diff --git a/Cargo.toml b/Cargo.toml
index 5642d06..141dd15 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,10 +8,7 @@ readme = "README.md"
 repository = "https://code.ascee.nl/ascee/lasprs"
 license = "MIT OR Apache-2.0"
 keywords = ["dsp", "audio", "measurement", "acoustics", "filter"]
-categories = [
-    "multimedia::audio",
-    "science",
-    "mathematics"]
+categories = ["multimedia::audio", "science", "mathematics"]
 [lib]
 name = "lasprs"
 crate-type = ["cdylib", "rlib"]
@@ -31,15 +28,15 @@ num = "0.4.1"
 rayon = "1.8.0"
 
 # Python bindings
-pyo3 = { version = "0.20", features=["anyhow", "extension-module"], optional=true }
-numpy = { version = "0.20" }
+pyo3 = { version = "0.20", optional = true, features = ["extension-module", "anyhow"]}
+numpy = { version = "0.20", optional = true}
 
 # White noise etc
 rand = "0.8.5"
 rand_distr = "0.4.3"
 
 # Cross-platform audio lib
-cpal = { version = "0.15.2", optional=true }
+cpal = { version = "0.15.2", optional = true }
 
 # Nice enumerations
 strum = "0.25.0"
@@ -62,12 +59,28 @@ toml = "0.8.8"
 # Initialize array for non-copy type
 array-init = "2.1.0"
 
+# Types of a sample
+dasp_sample = "0.11.0"
+
+# Required for recording and looking into measurements
+hdf5-sys = { version = "0.8.1", features = ["static"], optional = true }
+hdf5 = { version = "0.8.1", optional = true }
+
+# Useful iterator stuff
+itertools = "0.12.0"
+
+# For getting timestamps. Only useful when recording.
+chrono = {version = "0.4.31", optional = true}
+# For getting UUIDs in recording
+uuid = { version = "1.6.1", features = ["v4"] , optional = true}
+
 [features]
-default = ["f64", "cpal_api"]
-# Use this for debugging extension
-# default = ["f64", "extension-module", "pyo3/extension-module"]
+default = ["f64", "cpal_api", "record"]
+# Use this for debugging extensions
+# default = ["f64", "python-bindings", "record", "cpal-api"]
+
 cpal_api = ["dep:cpal"]
-# default = ["f64", "cpal_api"]
+record = ["dep:hdf5-sys", "dep:hdf5", "dep:chrono", "dep:uuid"]
 f64 = []
 f32 = []
-extension-module = ["dep:pyo3", "pyo3/extension-module"]
+python-bindings = ["dep:pyo3", "dep:numpy"]
diff --git a/src/bin/lasp_devinfo.rs b/src/bin/lasp_devinfo.rs
new file mode 100644
index 0000000..3f5f4ab
--- /dev/null
+++ b/src/bin/lasp_devinfo.rs
@@ -0,0 +1,15 @@
+use anyhow::Result;
+use lasprs::daq::StreamMgr;
+
+fn main() -> Result<()> {
+    let mut smgr = StreamMgr::new();
+
+    let devs = smgr.getDeviceInfo();
+    for dev in devs {
+        println!("=========");
+        println!("{:?}", dev);
+        println!("-------------");
+    }
+
+    Ok(())
+}
diff --git a/src/bin/lasp_inputdefault.rs b/src/bin/lasp_inputdefault.rs
new file mode 100644
index 0000000..ff1dcba
--- /dev/null
+++ b/src/bin/lasp_inputdefault.rs
@@ -0,0 +1,56 @@
+use anyhow::Result;
+use crossbeam::channel::{unbounded, Receiver, Sender, TryRecvError};
+use lasprs::daq::{StreamHandler, StreamMgr, InStreamMsg};
+use std::io;
+use std::{thread, time};
+// use
+
+fn spawn_stdin_channel() -> Receiver<String> {
+    let (tx, rx) = unbounded();
+    thread::spawn(move || loop {
+        let mut buffer = String::new();
+        io::stdin().read_line(&mut buffer).unwrap();
+        tx.send(buffer).unwrap();
+    });
+    rx
+}
+fn sleep(millis: u64) {
+    let duration = time::Duration::from_millis(millis);
+    thread::sleep(duration);
+}
+fn main() -> Result<()> {
+    let mut smgr = StreamMgr::new();
+
+    smgr.startDefaultInputStream()?;
+    let stdin_channel = spawn_stdin_channel();
+
+    let sh = StreamHandler::new(&mut smgr);
+
+    'infy: loop {
+        match stdin_channel.try_recv() {
+            Ok(_key) => break 'infy,
+            Err(TryRecvError::Empty) => {}
+            Err(TryRecvError::Disconnected) => panic!("Channel disconnected"),
+        }
+        sleep(100);
+        match sh.rx.try_recv() {
+            Ok(msg) => {
+                // eprint!("Obtained message: {:?}", msg);
+                match msg {
+                    InStreamMsg::StreamStarted(meta) => {
+                        println!("Stream started: {:?}", meta);
+                    },
+                    _ => { println!("Other msg...");}
+                }
+            }
+            Err(e) => match e {
+                TryRecvError::Disconnected => {
+                    break 'infy;
+                }
+                TryRecvError::Empty => {}
+            },
+        }
+    }
+
+    Ok(())
+}
diff --git a/src/bin/lasp_recorddefault.rs b/src/bin/lasp_recorddefault.rs
new file mode 100644
index 0000000..531f31a
--- /dev/null
+++ b/src/bin/lasp_recorddefault.rs
@@ -0,0 +1,45 @@
+use anyhow::Result;
+#[cfg(feature="record")]
+use lasprs::daq::{RecordSettings, RecordStatus, Recording, StreamMgr};
+use std::{thread, time::{self, Duration}};
+// use
+
+#[cfg(feature="record")]
+fn main() -> Result<()> {
+    let mut smgr = StreamMgr::new();
+
+    let settings = RecordSettings {
+        filename: "test.h5".into(),
+        duration: Duration::from_secs(2),
+    };
+
+    smgr.startDefaultInputStream()?;
+    let mut r = Recording::new(settings, &mut smgr)?;
+    
+    println!("Starting to record...");
+    loop {
+        match r.status() {
+            RecordStatus::Idle => println!("Idle"),
+            RecordStatus::Error(e) => {
+                println!("Record error: {}", e);
+                break;
+
+            }
+            RecordStatus::Finished => {
+                println!("\nRecording finished.");
+                break;
+            }
+            RecordStatus::Recording(duration) => {
+                print!("\rRecording...   {} ms", duration.as_millis());
+            }
+        };
+        sleep(10);
+    }
+
+    Ok(())
+}
+
+fn sleep(millis: u64) {
+    let duration = time::Duration::from_millis(millis);
+    thread::sleep(duration);
+}
diff --git a/src/bin/test_input.rs b/src/bin/test_input.rs
deleted file mode 100644
index be7d5bc..0000000
--- a/src/bin/test_input.rs
+++ /dev/null
@@ -1,14 +0,0 @@
-use lasprs::daq::StreamMgr;
-use anyhow::Result;
-use std::io;
-
-fn main() -> Result<()> {
-
-    let mut smgr = StreamMgr::new();
-
-    smgr.startDefaultInputStream()?;
-
-    let _ = io::stdin().read_line(&mut (String::new()));
-
-    Ok(())
-}
diff --git a/src/config.rs b/src/config.rs
index 533e19b..46f5960 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -1,22 +1,26 @@
-// #![
-#[cfg(feature = "f32")]
-pub type Flt = f32;
-#[cfg(feature = "f32")]
-pub const pi: Flt = std::f32::consts::PI;
+//! Configuration of module. Here, we can choose to compile for 32-bits or 64-bit floating point values
+//! as basic data storage and computation size. Default is f64.
+//!
 
-#[cfg(feature = "f64")]
-pub type Flt = f64;
-#[cfg(feature = "f64")]
-pub const pi: Flt = std::f64::consts::PI;
-
-/// The maximum number of input channels allowed. Compile time constant to make some structs Copy.
-pub const MAX_INPUT_CHANNELS: usize = 128;
+cfg_if::cfg_if! {
+    if #[cfg(feature="f64")] {
+        pub type Flt = f64;
+        pub const pi: Flt = std::f64::consts::PI;
+    }
+    else if #[cfg(feature="f32")] {
+        pub type Flt = f32;
+        pub const pi: Flt = std::f32::consts::PI;
+    }
+    else {
+        std::compile_error!("feature should be f32 or f64");
+    }
+}
 
 use num::complex::*;
 /// Complex number floating point
 pub type Cflt = Complex<Flt>;
 
-use numpy::ndarray::{Array1, Array2};
+use ndarray::{Array1, Array2};
 pub type Vd = Vec<Flt>;
 pub type Vc = Vec<Cflt>;
 
@@ -25,4 +29,3 @@ pub type Ccol = Array1<Cflt>;
 
 pub type Dmat = Array2<Flt>;
 pub type Cmat = Array2<Cflt>;
-
diff --git a/src/daq/api/api_cpal.rs b/src/daq/api/api_cpal.rs
index 7099423..e21fae2 100644
--- a/src/daq/api/api_cpal.rs
+++ b/src/daq/api/api_cpal.rs
@@ -1,58 +1,211 @@
+#![allow(dead_code)]
 use super::Stream;
+use crate::config::{self, *};
+use crate::daq::daqconfig::{DaqChannel, DaqConfig};
 use crate::daq::deviceinfo::DeviceInfo;
-use crate::daq::streammsg::*;
+use crate::daq::{self, streammsg::*, DataType};
+use crate::siggen::Siggen;
 use anyhow::{bail, Result};
 use cpal::traits::{DeviceTrait, HostTrait, StreamTrait};
-use cpal::{Device, Host, Sample, SampleFormat};
-use crossbeam::channel::Sender;
+use cpal::{Device, Host, Sample, SampleFormat, SupportedBufferSize};
+use crossbeam::channel::{Receiver, Sender};
+use itertools::Itertools;
 use std::sync::Arc;
 
+/// Convert datatype in CPAL sampleformat
+impl From<DataType> for cpal::SampleFormat {
+    fn from(dt: DataType) -> cpal::SampleFormat {
+        let sf = match dt {
+            DataType::F64 => SampleFormat::F64,
+            DataType::F32 => SampleFormat::F32,
+            DataType::I8 => SampleFormat::I8,
+            DataType::I16 => SampleFormat::I16,
+            DataType::I32 => SampleFormat::I32,
+            DataType::I64 => SampleFormat::I64,
+        };
+        sf
+    }
+}
+impl From<cpal::SampleFormat> for DataType {
+    fn from(sf: cpal::SampleFormat) -> DataType {
+        let dt = match sf {
+            SampleFormat::F64 => DataType::F64,
+            SampleFormat::F32 => DataType::F32,
+            SampleFormat::I8 => DataType::I8,
+            SampleFormat::I16 => DataType::I16,
+            SampleFormat::I32 => DataType::I32,
+            SampleFormat::I64 => DataType::I64,
+            _ => panic!("Not implemented sample format: {}", sf),
+        };
+        dt
+    }
+}
+
 /// Cpal api
 pub struct CpalApi {
     host: cpal::Host,
 }
-impl Stream for cpal::Stream {}
+pub struct CpalStream {
+    stream: cpal::Stream,
+    md: Option<StreamMetaData>,
+    noutchannels: usize,
+}
+impl Stream for CpalStream {
+    fn metadata(&self) -> Option<StreamMetaData> {
+        self.md.clone()
+    }
+    fn ninchannels(&self) -> usize {
+        if let Some(md) = &self.md {
+            return md.nchannels();
+        }
+        0
+    }
+    fn noutchannels(&self) -> usize {
+        self.noutchannels
+    }
+}
 
 impl CpalApi {
     pub fn new() -> CpalApi {
+        // for h in cpal::platform::available_hosts() {
+        //     println!("h: {:?}", h);
+        // }
         CpalApi {
             host: cpal::default_host(),
         }
     }
     pub fn getDeviceInfo(&self) -> Result<Vec<DeviceInfo>> {
-        let devs = vec![];
-        for dev in self.host.devices()? {
+        let srs_1 = [
+            1000, 2000, 4000, 8000, 12000, 16000, 24000, 48000, 96000, 192000, 384000,
+        ];
+        let srs_2 = [11025, 22050, 44100, 88200];
 
+        let mut srs_tot = Vec::from_iter(srs_1.iter().chain(srs_2.iter()));
+        srs_tot.sort();
+        let srs_tot = Vec::from_iter(srs_tot.iter().copied().map(|i| *i as Flt));
+
+        // srs_tot.sort();
+
+        let mut devs = vec![];
+        for dev in self.host.devices()? {
+            // println!("{:?}", dev.name());
+            let mut iChannelCount = 0;
+            let mut oChannelCount = 0;
+
+            let mut sample_rates = srs_tot.clone();
+            let mut avFramesPerBlock = vec![256, 512, 1024, 2048, 8192];
+
+            let mut sample_formats = vec![];
+            // Search for sample formats
+            if let Ok(icfg) = dev.supported_input_configs() {
+                for icfg in icfg {
+                    let thissf = icfg.sample_format();
+                    if thissf.is_uint() {
+                        continue;
+                    }
+                    sample_formats.push(icfg.sample_format());
+                    sample_rates.retain(|sr| *sr >= icfg.min_sample_rate().0 as Flt);
+                    sample_rates.retain(|sr| *sr <= icfg.max_sample_rate().0 as Flt);
+                    if let SupportedBufferSize::Range { min, max } = icfg.buffer_size() {
+                        avFramesPerBlock.retain(|i| i >= min);
+                        avFramesPerBlock.retain(|i| i <= max);
+                    }
+                    iChannelCount = icfg.channels() as u8;
+                    // avFramesPerBlock.retain(|i| i >= icfg.buffer_size().)
+                }
+            }
+            if let Ok(ocfg) = dev.supported_input_configs() {
+                for ocfg in ocfg {
+                    let thissf = ocfg.sample_format();
+                    if thissf.is_uint() {
+                        continue;
+                    }
+                    sample_formats.push(thissf);
+                    sample_rates.retain(|sr| *sr >= ocfg.min_sample_rate().0 as Flt);
+                    sample_rates.retain(|sr| *sr <= ocfg.max_sample_rate().0 as Flt);
+                    if let SupportedBufferSize::Range { min, max } = ocfg.buffer_size() {
+                        avFramesPerBlock.retain(|i| i >= min);
+                        avFramesPerBlock.retain(|i| i <= max);
+                    }
+                    oChannelCount = ocfg.channels() as u8;
+                }
+            }
+            sample_formats.dedup();
+            if sample_formats.len() == 0 {
+                continue;
+            }
+
+            let dtypes: Vec<DataType> =
+                sample_formats.iter().dedup().map(|i| (*i).into()).collect();
+
+            let prefDataType = match dtypes.iter().position(|d| d == &DataType::F32) {
+                Some(idx) => dtypes[idx],
+                None => dtypes[dtypes.len() - 1],
+            };
+            let prefSampleRate = *sample_rates.last().unwrap_or(&48000.);
+            devs.push(DeviceInfo {
+                api: super::StreamApiDescr::Cpal,
+                name: dev.name()?,
+                avDataTypes: dtypes,
+                prefDataType,
+
+                avSampleRates: sample_rates,
+                prefSampleRate: prefSampleRate,
+                avFramesPerBlock,
+                prefFramesPerBlock: 2048,
+
+                iChannelCount,
+                oChannelCount,
+
+                hasInputIEPE: false,
+                hasInputACCouplingSwitch: false,
+                hasInputTrigger: false,
+                hasInternalOutputMonitor: false,
+                duplexModeForced: false,
+                physicalIOQty: daq::Qty::Number,
+            })
         }
+
         Ok(devs)
     }
 
-    fn build_input_stream(
-        sf: cpal::SampleFormat,
-        config: cpal::StreamConfig,
-        device: &cpal::Device,
-        sender: Sender<RawStreamData>,
-    ) -> Result<cpal::Stream> {
-
-        let sender_errcallback = sender.clone();
-
+    // Create the error function closure, that capture the send channel on which error messages from the stream are sent
+    fn create_errfcn(send_ch: Sender<RawStreamData>) -> impl FnMut(cpal::StreamError) {
         let errfn = move |err: cpal::StreamError| match err {
-            cpal::StreamError::DeviceNotAvailable => sender_errcallback
+            cpal::StreamError::DeviceNotAvailable => send_ch
                 .send(RawStreamData::StreamError(StreamError::DeviceNotAvailable))
                 .unwrap(),
-            cpal::StreamError::BackendSpecific { err: _ } => sender_errcallback
+            cpal::StreamError::BackendSpecific { err: _ } => send_ch
                 .send(RawStreamData::StreamError(StreamError::DriverError))
                 .unwrap(),
         };
+        errfn
+    }
 
+    /// Create an input stream for a CPAL device.
+    ///
+    /// # Arguments
+    ///
+    /// * sf: Sample format
+    fn build_input_stream(
+        sf: cpal::SampleFormat,
+        config: &cpal::StreamConfig,
+        device: &cpal::Device,
+        sender: Sender<RawStreamData>,
+        en_inchannels: Vec<usize>,
+        framesPerBlock: u32,
+    ) -> Result<cpal::Stream> {
+        let tot_inch = config.channels;
+
+        let sender_err = sender.clone();
         macro_rules! build_stream{
             ($($cpaltype:pat, $rtype:ty);*) => {
                 match sf {
                     $(
                         $cpaltype => device.build_input_stream(
                             &config,
-                            move |data, _: &_| InStreamCallback::<$rtype>(data, &sender),
-                            errfn,
+                            move |data, _: &_| InStreamCallback::<$rtype>(data, &sender, tot_inch, &en_inchannels, framesPerBlock),
+                            CpalApi::create_errfcn(sender_err),
                             None)?
                         ),*,
                         _ => bail!("Unsupported sample format '{}'", sf)
@@ -67,7 +220,127 @@ impl CpalApi {
         );
         Ok(stream)
     }
-    /// Start a default input stream
+
+    /// Create CPAL specific configuration, from our specified daq config and device info
+    fn create_cpal_config<T>(
+        st: StreamType,
+        devinfo: &DeviceInfo,
+        conf: &DaqConfig,
+        dev: &cpal::Device,
+        conf_iterator: T,
+    ) -> Result<cpal::SupportedStreamConfig>
+    where
+        T: Iterator<Item = cpal::SupportedStreamConfigRange>,
+    {
+        let nchannels = match st {
+            StreamType::Input => devinfo.iChannelCount,
+            StreamType::Output => devinfo.oChannelCount,
+            _ => unreachable!(),
+        };
+        for cpalconf in conf_iterator {
+            if cpalconf.sample_format() == conf.dtype.into() {
+                // Specified sample format is available
+                if cpalconf.channels() == nchannels as u16 {
+                    let requested_sr = conf.sampleRate(devinfo);
+                    if cpalconf.min_sample_rate().0 as Flt <= requested_sr
+                        && cpalconf.max_sample_rate().0 as Flt >= requested_sr
+                    {
+                        // Sample rate falls within range.
+                        let requested_fpb = conf.framesPerBlock(devinfo);
+                        // Last check: check if buffer size is allowed
+                        match cpalconf.buffer_size() {
+                            SupportedBufferSize::Range { min, max } => {
+                                if min >= &requested_fpb || max <= &requested_fpb {
+                                    bail!(
+                                        "Frames per block should be >= {} and <= {}. Requested {}.",
+                                        min,
+                                        max,
+                                        requested_fpb
+                                    )
+                                }
+                            }
+                            _ => {}
+                        }
+                        return Ok(cpalconf.with_sample_rate(cpal::SampleRate(requested_sr as u32)));
+                    }
+                }
+            }
+        }
+        bail!("API error: specified DAQ configuration is not available for device")
+    }
+
+    /// Start a stream for a device with a given configuration.
+    pub fn startStream(
+        &self,
+        stype: StreamType,
+        devinfo: &DeviceInfo,
+        conf: &DaqConfig,
+        sender: Sender<RawStreamData>,
+    ) -> Result<Box<dyn Stream>> {
+        for cpaldev in self.host.devices()? {
+            // See if we can create a supported stream config.
+            let supported_config = match stype {
+                StreamType::Duplex => bail!("Duplex stream not supported for CPAL"),
+                StreamType::Input => CpalApi::create_cpal_config(
+                    stype.clone(),
+                    devinfo,
+                    conf,
+                    &cpaldev,
+                    cpaldev.supported_input_configs()?,
+                ),
+                StreamType::Output => CpalApi::create_cpal_config(
+                    stype.clone(),
+                    devinfo,
+                    conf,
+                    &cpaldev,
+                    cpaldev.supported_output_configs()?,
+                ),
+            }?;
+            let framesPerBlock = conf.framesPerBlock(devinfo);
+
+            let sf = supported_config.sample_format();
+            let config: cpal::StreamConfig = supported_config.config();
+
+            let (stream, metadata) = match stype {
+                StreamType::Input => {
+                    let meta = StreamMetaData::new(
+                        &conf.enabledInchannelConfig(),
+                        conf.dtype,
+                        supported_config.sample_rate().0 as Flt,
+                        framesPerBlock,
+                    )?;
+
+                    let stream = CpalApi::build_input_stream(
+                        sf,
+                        &config,
+                        &cpaldev,
+                        sender,
+                        conf.enabledInchannelsList(),
+                        framesPerBlock,
+                    )?;
+                    (stream, Some(meta))
+                }
+
+                StreamType::Output => bail!("Not implemented output stream"),
+                _ => unreachable!(""),
+            };
+
+            stream.play()?;
+
+            let noutchannels = conf.numberEnabledOutChannels();
+            return Ok(Box::new(CpalStream {
+                stream,
+                md: metadata,
+                noutchannels,
+            }));
+        }
+        bail!(format!(
+            "Error: requested device {} not found. Please make sure the device is available.",
+            devinfo.name
+        ))
+    }
+
+    /// Start a default input stream for a device
     ///
     ///
     pub fn startDefaultInputStream(
@@ -76,18 +349,45 @@ impl CpalApi {
     ) -> Result<Box<dyn Stream>> {
         if let Some(device) = self.host.default_input_device() {
             if let Ok(config) = device.default_input_config() {
+                let framesPerBlock = 4096;
                 let final_config = cpal::StreamConfig {
                     channels: config.channels(),
                     sample_rate: config.sample_rate(),
-                    buffer_size: cpal::BufferSize::Fixed(4096),
+                    buffer_size: cpal::BufferSize::Fixed(framesPerBlock),
                 };
+                let en_inchannels = Vec::from_iter((0..config.channels()).map(|i| i as usize));
 
                 let sf = config.sample_format();
-                let stream = CpalApi::build_input_stream(sf, final_config, &device, sender)?;
+                let stream = CpalApi::build_input_stream(
+                    sf,
+                    &final_config,
+                    &device,
+                    sender,
+                    en_inchannels,
+                    framesPerBlock,
+                )?;
                 stream.play()?;
-                println!("Stream started with sample format {:?}", sf);
 
-                Ok(Box::new(stream))
+                // Daq: default channel config
+                let daqchannels = Vec::from_iter((0..final_config.channels).map(|i| {
+                    DaqChannel::defaultAudioInput(format!("Unnamed input channel {}", i))
+                }));
+
+                // Specify data tape
+                let dtype = DataType::from(sf);
+
+                // Create stream metadata
+                let md = StreamMetaData::new(
+                    &daqchannels,
+                    dtype,
+                    config.sample_rate().0 as Flt,
+                    framesPerBlock,
+                )?;
+                Ok(Box::new(CpalStream {
+                    stream,
+                    md: Some(md),
+                    noutchannels: 0,
+                }))
             } else {
                 bail!("Could not obtain default input configuration")
             }
@@ -95,15 +395,62 @@ impl CpalApi {
             bail!("Could not open default input device")
         }
     }
-    // pub fn getDeviceInfo(&self) -> Result<Vec<DeviceInfo>> {
-
+    // Create an output stream, using given signal generators for each channel.
+    // fn build_output_stream(
+    //     sf: cpal::SampleFormat,
+    //     config: cpal::StreamConfig,
+    //     device: &cpal::Device,
+    //     siggens: Vec<Siggen>,
+    // ) -> Result<cpal::Stream> {
+    //     macro_rules! build_stream{
+    //         ($($cpaltype:pat, $rtype:ty);*) => {
+    //             match sf {
+    //                 $(
+    //                     $cpaltype => device.build_input_stream(
+    //                         &config,
+    //                         move |data, _: &_| InStreamCallback::<$rtype>(data, &sender),
+    //                         CpalApi::create_errfcn(sender.clone()),
+    //                         None)?
+    //                     ),*,
+    //                     _ => bail!("Unsupported sample format '{}'", sf)
+    //             }
+    //         }
+    //     }
+    //     let stream: cpal::Stream = build_stream!(
+    //     SampleFormat::I8, i8;
+    //     SampleFormat::I16, i16;
+    //     SampleFormat::I32, i32;
+    //     SampleFormat::F32, f32
+    //     );
+    //     Ok(stream)
     // }
 }
 
-fn InStreamCallback<T>(input: &[T], sender: &Sender<RawStreamData>)
-where
+fn InStreamCallback<T>(
+    input: &[T],
+    sender: &Sender<RawStreamData>,
+    tot_inch: u16,
+    en_inchannels: &[usize],
+    framesPerBlock: u32,
+) where
     T: Copy + num::ToPrimitive + 'static,
 {
     let msg = RawStreamData::from(input);
+    let nen_ch = en_inchannels.len();
+    let nframes = input.len() / tot_inch as usize;
+    let mut enabled_ch_data = Vec::with_capacity(nen_ch * nframes);
+    unsafe {
+        enabled_ch_data.set_len(enabled_ch_data.capacity());
+    }
+    // Chops of the disabled channels and forwards the data, DEINTERLEAVED
+    for (chout_idx, chout) in en_inchannels.iter().enumerate() {
+        let in_iterator = input.iter().skip(*chout).step_by(tot_inch as usize);
+        let out_iterator = enabled_ch_data.iter_mut().skip(chout_idx * nframes);
+        for (out, in_) in out_iterator.zip(in_iterator) {
+            *out = *in_;
+        }
+    }
+
+    let msg = RawStreamData::from(enabled_ch_data);
     sender.send(msg).unwrap()
 }
diff --git a/src/daq/api/api_pulse.rs b/src/daq/api/api_pulse.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/daq/api/mod.rs b/src/daq/api/mod.rs
index d2cddd5..a1dbc28 100644
--- a/src/daq/api/mod.rs
+++ b/src/daq/api/mod.rs
@@ -1,19 +1,29 @@
+use serde::{Deserialize, Serialize};
 /// Daq apis that are optionally compiled in. Examples:
 ///
 /// - CPAL (Cross-Platform Audio Library)
 /// - ...
 use strum::EnumMessage;
 use strum_macros;
-use serde::{Serialize, Deserialize};
 
-cfg_if::cfg_if! {
-    if #[cfg(feature="cpal_api")] {
-        pub mod api_cpal;
-    } else { }
-}
+use super::StreamMetaData;
 
+#[cfg(feature = "cpal_api")]
+pub mod api_cpal;
+
+#[cfg(feature = "pulse_api")]
+pub mod api_pulse;
 /// A currently running stream
-pub trait Stream { }
+pub trait Stream {
+    /// Stream metadata. Only available for input streams
+    fn metadata(&self) -> Option<StreamMetaData>;
+
+    /// Number of input channels in stream
+    fn ninchannels(&self) -> usize;
+
+    /// Number of output channels in stream
+    fn noutchannels(&self) -> usize;
+}
 
 #[derive(strum_macros::EnumMessage, Debug, Clone, PartialEq, Serialize, Deserialize)]
 #[allow(dead_code)]
diff --git a/src/daq/daqconfig.rs b/src/daq/daqconfig.rs
index 3f4e948..bcc274f 100644
--- a/src/daq/daqconfig.rs
+++ b/src/daq/daqconfig.rs
@@ -1,5 +1,6 @@
 use super::api::StreamApiDescr;
 use super::datatype::DataType;
+use super::deviceinfo::DeviceInfo;
 use super::qty::Qty;
 use crate::config::*;
 use serde::{Deserialize, Serialize};
@@ -35,18 +36,96 @@ impl Default for DaqChannel {
         }
     }
 }
+impl DaqChannel {
+    /// Default channel configuration for audio input from a certain channel
+    pub fn defaultAudioInput(name: String) -> Self {
+        DaqChannel {
+            enabled: true,
+            name: name,
+            sensitivity: 1.0,
+            IEPEEnabled: false,
+            ACCouplingMode: false,
+            rangeIndex: 0,
+            qty: Qty::Number,
+        }
+    }
+}
 
 /// Configuration of a device.
 #[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
 pub struct DaqConfig {
+    /// The API
     pub api: StreamApiDescr,
+    /// Device name. Should match when starting a stream
     pub device_name: String,
 
+    /// Configuration of the input channels
     pub inchannel_config: Vec<DaqChannel>,
+    /// Configuration of the output channels
     pub outchannel_config: Vec<DaqChannel>,
+    /// The data type to use
     pub dtype: DataType,
+    /// Whether to apply a digital high pass on the input. <=0 means disabled. > 0 means, the value specifies the cut-on frequency for the first order high pass filter.
     pub digitalHighPassCutOn: Flt,
+    /// The index to use in the list of possible sample rates
     sampleRateIndex: usize,
-    framesPerBlocIndex: usize,
+    /// The index to use in the list of possible frames per block
+    framesPerBlockIndex: usize,
+    /// Used when output channels should be monitored, i.e. reverse-looped back as input channels.
     monitorOutput: bool,
 }
+
+impl DaqConfig {
+    /// Returns a list of enabled input channel numbers as indices
+    /// in the list of all input channels (enabled and not)
+    pub fn enabledInchannelsList(&self) -> Vec<usize> {
+        self.inchannel_config
+            .iter()
+            .enumerate()
+            .filter(|(_, ch)| ch.enabled)
+            .map(|(i, _)| i)
+            .collect()
+    }
+
+    /// Returns the total number of channels that appear in a running input stream.
+    pub fn numberEnabledInChannels(&self) -> usize {
+        self.inchannel_config
+            .iter()
+            .filter(|ch| ch.enabled)
+            .count()
+    }
+    /// Returns the total number of channels that appear in a running output stream.
+    pub fn numberEnabledOutChannels(&self) -> usize {
+        self.outchannel_config
+            .iter()
+            .filter(|ch| ch.enabled)
+            .count()
+    }
+
+    /// Provide samplerate, based on device and specified sample rate index
+    pub fn sampleRate(&self, dev: &DeviceInfo) -> Flt {
+        dev.avSampleRates[self.sampleRateIndex]
+    }
+
+    /// Provide samplerate, based on device and specified sample rate index
+    pub fn framesPerBlock(&self, dev: &DeviceInfo) -> u32 {
+        dev.avFramesPerBlock[self.framesPerBlockIndex]
+    }
+
+    /// Returns vec of channel configuration for enabled input channels only
+    pub fn enabledInchannelConfig(&self) -> Vec<DaqChannel> {
+        self.inchannel_config
+            .iter()
+            .filter(|ch| ch.enabled)
+            .cloned()
+            .collect()
+    }
+    /// Returns vec of channel configuration for enabled output channels only
+    pub fn enabledOutchannelConfig(&self) -> Vec<DaqChannel> {
+        self.outchannel_config
+            .iter()
+            .filter(|ch| ch.enabled)
+            .cloned()
+            .collect()
+    }
+}
diff --git a/src/daq/datatype.rs b/src/daq/datatype.rs
index bd8fe7a..9fc3804 100644
--- a/src/daq/datatype.rs
+++ b/src/daq/datatype.rs
@@ -15,12 +15,16 @@ pub enum DataType {
     #[strum(message = "F64", detailed_message = "64-bits floating points")]
     F64 = 1,
     /// 8-bit integers
-    #[strum(message = "F8", detailed_message = "8-bits integers")]
+    #[strum(message = "I8", detailed_message = "8-bits integers")]
     I8 = 2,
     /// 16-bit integers
-    #[strum(message = "F16", detailed_message = "16-bits integers")]
+    #[strum(message = "I16", detailed_message = "16-bits integers")]
     I16 = 3,
     /// 32-bit integers
-    #[strum(message = "F32", detailed_message = "32-bits integers")]
+    #[strum(message = "I32", detailed_message = "32-bits integers")]
     I32 = 4,
+    
+    /// 64-bit integers
+    #[strum(message = "I64", detailed_message = "64-bits integers")]
+    I64 = 5,
 }
diff --git a/src/daq/deviceinfo.rs b/src/daq/deviceinfo.rs
index a8e86e1..22af511 100644
--- a/src/daq/deviceinfo.rs
+++ b/src/daq/deviceinfo.rs
@@ -1,8 +1,7 @@
 //! Data acquisition model. Provides abstract layers around DAQ devices.
 #![allow(non_snake_case)]
 
-use super::datatype::DataType;
-use super::qty::Qty;
+use super::*;
 use super::api::StreamApiDescr;
 
 /// Device info structure. Gives all information regarding a device, i.e. the number of input and
@@ -23,14 +22,14 @@ pub struct DeviceInfo {
     pub prefDataType: DataType,
 
     /// Available frames per block
-    pub avFramesPerBlock: Vec<u16>,
+    pub avFramesPerBlock: Vec<u32>,
     /// Preferred frames per block for device
-    pub prefFramesPerBlock: u16,
+    pub prefFramesPerBlock: usize,
 
     /// Available sample rates
-    pub avSampleRates: Vec<u16>,
+    pub avSampleRates: Vec<Flt>,
     /// Preferred sample rate for device
-    pub prefSampleRate: u16,
+    pub prefSampleRate: Flt,
 
     /// Number of input channels available for this device
     pub iChannelCount: u8,
diff --git a/src/daq/mod.rs b/src/daq/mod.rs
index fbcdaf3..7c23697 100644
--- a/src/daq/mod.rs
+++ b/src/daq/mod.rs
@@ -5,22 +5,33 @@ mod daqconfig;
 mod datatype;
 mod deviceinfo;
 mod qty;
+#[cfg(feature = "record")]
+mod record;
+mod streamhandler;
 mod streammsg;
 
+pub use daqconfig::*;
 pub use datatype::*;
 pub use deviceinfo::*;
 pub use qty::*;
+pub use streamhandler::*;
 pub use streammsg::*;
 
+#[cfg(feature = "record")]
+pub use record::*;
+
 #[cfg(feature = "cpal_api")]
 use api::api_cpal::CpalApi;
 
-use crate::config::*;
+use crate::{
+    config::*,
+    siggen::{self, Siggen},
+};
 use anyhow::{bail, Error, Result};
 use api::Stream;
 use core::time;
 use crossbeam::{
-    channel::{unbounded, Receiver, Sender},
+    channel::{unbounded, Receiver, Sender, TrySendError},
     thread,
 };
 use deviceinfo::DeviceInfo;
@@ -31,10 +42,10 @@ use streammsg::*;
 /// Keep track of whether the stream has been created. To ensure singleton behaviour.
 static smgr_created: AtomicBool = AtomicBool::new(false);
 
-struct InputStream {
+struct StreamData<T> {
     streamtype: StreamType,
     stream: Box<dyn Stream>,
-    threadhandle: JoinHandle<InQueues>,
+    threadhandle: JoinHandle<T>,
     comm: Sender<StreamCommand>,
 }
 
@@ -42,13 +53,10 @@ struct InputStream {
 ///
 pub struct StreamMgr {
     // Input stream can be both input and duplex
-    input_stream: Option<InputStream>,
+    input_stream: Option<StreamData<InQueues>>,
 
     // Output only stream
-    output_stream: Option<Box<dyn Stream>>,
-
-    // Signal generator
-    siggen: Option<crate::siggen::Siggen>,
+    output_stream: Option<StreamData<Siggen>>,
 
     #[cfg(feature = "cpal_api")]
     cpal_api: CpalApi,
@@ -57,6 +65,12 @@ pub struct StreamMgr {
     /// are here. When stream is running, they will become available
     /// in the JoinHandle of the thread.
     instreamqueues: Option<InQueues>,
+
+    // Signal generator. Stored here on the bench in case no stream is running.
+    // It is picked when it is configured correctly for the starting output stream
+    // If it is not configured correctly, when a stream that outputs data is started
+    // ,it is removed here.
+    siggen: Option<crate::siggen::Siggen>,
 }
 
 impl StreamMgr {
@@ -82,41 +96,67 @@ impl StreamMgr {
             instreamqueues: Some(vec![]),
         }
     }
-    /// Obtain a list of devices that are available for each available API
-    fn getDeviceInfo(&mut self) -> Vec<DeviceInfo> {
-        let mut devinfo = vec![];
-        #[cfg(feature="cpal_api")]
-        devinfo.extend(self.cpal_api.getDeviceInfo());
-        devinfo
+    /// Set a new signal generator. Returns an error if it is unapplicable.
+    /// It is unapplicable if the number of channels of output does not match the
+    /// number of output channels in a running stream.
+    pub fn setSiggen(&mut self, siggen: Siggen) -> Result<()> {
+        // Current signal generator. Where to place it?
+        if let Some(is) = &self.input_stream {
+            if let StreamType::Duplex = is.streamtype {
+                if siggen.nchannels() != is.stream.noutchannels() {
+                    bail!("Invalid number of channels configured in signal generator")
+                }
+                assert!(self.siggen.is_none());
+                is.comm.send(StreamCommand::NewSiggen(siggen)).unwrap();
+                return Ok(());
+            }
+        } else if let Some(os) = &self.output_stream {
+            assert!(self.siggen.is_none());
+            if siggen.nchannels() != os.stream.noutchannels() {
+                bail!("Invalid number of channels configured in signal generator")
+            }
+            os.comm.send(StreamCommand::NewSiggen(siggen)).unwrap();
+            return Ok(());
+        } else {
+            self.siggen = Some(siggen);
+            return Ok(());
+        }
+        unreachable!()
     }
 
-    /// Start a default input stream, using default settings on everything. This is only possible
-    /// when
-    pub fn startDefaultInputStream(&mut self) -> Result<()> {
-        #![allow(unreachable_code)]
-        if !self.input_stream.is_none() {
-            bail!("Input stream is already running. Please first stop existing input stream.")
-        }
-
-        let (tx, rx): (Sender<RawStreamData>, Receiver<RawStreamData>) = unbounded();
-
-        cfg_if::cfg_if! {
-            if #[cfg(feature="cpal_api")] {
-                let stream = self.cpal_api.startDefaultInputStream(tx)?;
-            }
-            else {
-                bail!("Unable to start default input stream: no CPAL api available")
+    /// Obtain a list of devices that are available for each available API
+    pub fn getDeviceInfo(&mut self) -> Vec<DeviceInfo> {
+        let mut devinfo = vec![];
+        #[cfg(feature = "cpal_api")]
+        {
+            let cpal_devs = self.cpal_api.getDeviceInfo();
+            if let Ok(devs) = cpal_devs {
+                devinfo.extend(devs);
             }
         }
+        devinfo
+    }
+    /// Add a new queue to the lists of queues
+    pub fn addInQueue(&mut self, tx: Sender<InStreamMsg>) {
+        if let Some(is) = &self.input_stream {
+            is.comm.send(StreamCommand::AddInQueue(tx)).unwrap()
+        } else {
+            self.instreamqueues.as_mut().unwrap().push(tx);
+        }
+    }
+
+    fn startInputStreamThread(
+        &mut self,
+        stream: &Box<dyn Stream>,
+        rx: Receiver<RawStreamData>,
+    ) -> (JoinHandle<InQueues>, Sender<StreamCommand>) {
+        let (commtx, commrx) = unbounded();
 
         // Unwrap here, as the queues should be free to grab
         let mut iqueues = self.instreamqueues.take().unwrap();
 
-        let (commtx, commrx) = unbounded();
+        let meta = stream.metadata().unwrap();
 
-        // let metadata = StreamMetaData::new(
-        //     nchannels:
-        // ).unwrap();
         let threadhandle = std::thread::spawn(move || {
             let mut ctr: usize = 0;
             'infy: loop {
@@ -124,20 +164,24 @@ impl StreamMgr {
                     match comm_msg {
                         // New queue added
                         StreamCommand::AddInQueue(queue) => {
-                            iqueues.push(queue);
-                            // queue.send(streammsg::StreamMetaData(md))
+                            match queue.send(InStreamMsg::StreamStarted(Arc::new(meta.clone()))) {
+                                Ok(()) => iqueues.push(queue),
+                                Err(_) => {}
+                            }
                         }
 
                         // Remove queue from list
                         StreamCommand::RemoveInQueue(queue) => {
-                            iqueues.retain(|q| !Arc::ptr_eq(q, &queue))
+                            iqueues.retain(|q| !q.same_channel(&queue))
                         }
 
                         // Stop this thread. Returns the queue
                         StreamCommand::StopThread => {
-                            for q in iqueues.iter() {
-                                q.send(InStreamMsg::StreamStopped).unwrap();
-                            }
+                            sendMsgToAllQueues(&mut iqueues, InStreamMsg::StreamStopped);
+                            break 'infy;
+                        }
+                        StreamCommand::NewSiggen(_) => {
+                            panic!("Error: signal generator send to input-only stream.");
                             break 'infy;
                         }
                     }
@@ -145,33 +189,55 @@ impl StreamMgr {
                 if let Ok(msg) = rx.recv_timeout(time::Duration::from_millis(10)) {
                     // println!("Obtained raw stream data!");
                     let msg = Arc::new(msg);
-                    for q in iqueues.iter() {
-                        q.send(InStreamMsg::RawStreamData(ctr, msg.clone()))
-                            .unwrap();
-                    }
+                    let msg = InStreamMsg::RawStreamData(ctr, msg);
+                    sendMsgToAllQueues(&mut iqueues, msg);
                 }
                 ctr += 1;
             }
             iqueues
         });
+        (threadhandle, commtx)
+    }
 
-        cfg_if::cfg_if! {
-            if #[cfg(feature="cpal_api")] {
-                self.input_stream = Some(InputStream {
-                    streamtype: StreamType::Input,
-                    stream,
-                    threadhandle,
-                    comm: commtx,
-                });
-            } else {}
+    /// Start a default input stream, using default settings on everything. This is only possible
+    /// when
+    pub fn startDefaultInputStream(&mut self) -> Result<()> {
+        if self.input_stream.is_some() {
+            bail!("Input stream is already running. Please first stop existing input stream.")
         }
 
+        let (tx, rx): (Sender<RawStreamData>, Receiver<RawStreamData>) = unbounded();
+
+        // Only a default input stream when CPAL feature is enabled
+        cfg_if::cfg_if! {
+        if #[cfg(feature="cpal_api")] {
+        let stream = self.cpal_api.startDefaultInputStream(tx)?;
+                // Inform all listeners of new stream data
+
+        let iqueues = self.instreamqueues.as_mut().unwrap();
+        let meta = stream.metadata().unwrap();
+        sendMsgToAllQueues(iqueues, InStreamMsg::StreamStarted(Arc::new(meta)));
+
+        let (threadhandle, commtx) = self.startInputStreamThread(&stream, rx);
+
+        self.input_stream = Some(StreamData {
+            streamtype: StreamType::Input,
+            stream,
+            threadhandle,
+            comm: commtx,
+        });
         Ok(())
+
+        }
+        else {
+        bail!("Unable to start default input stream: no CPAL api available")
+        }
+        }
     }
 
     /// Stop existing input stream.
     pub fn stopInputStream(&mut self) -> Result<()> {
-        if let Some(InputStream {
+        if let Some(StreamData {
             streamtype: _, // Ignored here
             stream: _,
             threadhandle,
@@ -200,7 +266,6 @@ impl StreamMgr {
             _ => bail!("Not implemented output stream"),
         }
     }
-
 } // impl StreamMgr
 impl Drop for StreamMgr {
     fn drop(&mut self) {
@@ -217,6 +282,16 @@ impl Drop for StreamMgr {
     }
 }
 
+// Send to all queues, remove queues that are disconnected when found out
+// on the way.
+fn sendMsgToAllQueues(iqueues: &mut InQueues, msg: InStreamMsg) {
+    // Loop over queues. Remove queues that error when we try to send
+    // to them
+    iqueues.retain(|q| match q.try_send(msg.clone()) {
+        Ok(_) => true,
+        Err(_e) => false,
+    });
+}
 /// Daq devices
 trait Daq {}
 
diff --git a/src/daq/record.rs b/src/daq/record.rs
new file mode 100644
index 0000000..d035597
--- /dev/null
+++ b/src/daq/record.rs
@@ -0,0 +1,252 @@
+use super::*;
+use anyhow::{bail, Error, Result};
+use hdf5::types::{VarLenArray, VarLenUnicode};
+use hdf5::{dataset, datatype, Dataset, File, H5Type};
+use num::traits::ops::mul_add;
+use serde::de::IntoDeserializer;
+use std::path::{Path, PathBuf};
+use std::str::FromStr;
+use std::sync::Mutex;
+use std::thread::{spawn, JoinHandle};
+use std::time::Duration;
+use strum::EnumMessage;
+
+#[derive(Clone)]
+pub enum RecordStatus {
+    Idle,
+    Recording(Duration),
+    Finished,
+    Error(String),
+}
+
+/// Settings used to start a recording.
+pub struct RecordSettings {
+    /// File name to record to.
+    pub filename: PathBuf,
+
+    /// The recording time. Set to 0 to perform indefinite recording
+    pub duration: Duration,
+}
+
+/// Create a recording
+pub struct Recording {
+    handle: Option<JoinHandle<Result<()>>>,
+    tx: Sender<InStreamMsg>,
+    status: Arc<Mutex<RecordStatus>>,
+}
+
+impl Recording {
+    fn create_dataset_type<T>(file: &File, meta: &StreamMetaData) -> Result<Dataset>
+    where
+        T: H5Type,
+    {
+        let bs = meta.framesPerBlock as usize;
+        let nch = meta.nchannels();
+        match file
+            .new_dataset::<T>()
+            .chunk((1, bs, nch))
+            .shape((1.., bs, nch))
+            // .deflate(3)
+            .create("audio")
+        {
+            Ok(f) => Ok(f),
+            Err(e) => bail!("{}", e),
+        }
+    }
+
+    fn create_dataset(file: &File, meta: &StreamMetaData) -> Result<Dataset> {
+        match meta.rawDatatype {
+            DataType::I8 => Recording::create_dataset_type::<i8>(file, meta),
+            DataType::I16 => Recording::create_dataset_type::<i16>(file, meta),
+            DataType::I32 => Recording::create_dataset_type::<i32>(file, meta),
+            DataType::I64 => Recording::create_dataset_type::<i64>(file, meta),
+            DataType::F32 => Recording::create_dataset_type::<f32>(file, meta),
+            DataType::F64 => Recording::create_dataset_type::<f64>(file, meta),
+        }
+    }
+
+    fn write_hdf5_attr_scalar<T>(file: &File, name: &str, val: T) -> Result<()>
+    where
+        T: H5Type,
+    {
+        let attr = file.new_attr::<T>().create(name)?;
+        attr.write_scalar(&val)?;
+        Ok(())
+    }
+    fn write_hdf5_attr_list<T>(file: &File, name: &str, val: &[T]) -> Result<()>
+    where
+        T: H5Type,
+    {
+        let attr = file.new_attr::<T>().shape([val.len()]).create(name)?;
+        attr.write(&val)?;
+        Ok(())
+    }
+
+    /// Start a new recording
+    ///
+    /// # Arguments
+    ///
+    /// * setttings: The settings to use for the recording
+    /// * smgr: Stream manager to use to start the recording
+    ///
+    pub fn new(settings: RecordSettings, mgr: &mut StreamMgr) -> Result<Recording> {
+        let status = Arc::new(Mutex::new(RecordStatus::Idle));
+        let status2 = status.clone();
+
+        let (tx, rx) = crossbeam::channel::unbounded();
+        mgr.addInQueue(tx.clone());
+
+        // The thread doing the actual work
+        let handle = spawn(move || {
+            let file = File::create(settings.filename)?;
+
+            let firstmsg = match rx.recv() {
+                Ok(msg) => msg,
+                Err(e) => bail!("Queue handle error"),
+            };
+
+            let meta = match firstmsg {
+                InStreamMsg::StreamStarted(meta) => meta,
+                _ => bail!("Recording failed. Missed stream metadata message."),
+            };
+
+            // Samplerate, block size, number of channels
+            Recording::write_hdf5_attr_scalar(&file, "samplerate", meta.samplerate)?;
+            Recording::write_hdf5_attr_scalar(&file, "nchannels", meta.nchannels())?;
+            Recording::write_hdf5_attr_scalar(&file, "blocksize", meta.framesPerBlock)?;
+
+            // Store sensitivity
+            let sens: Vec<Flt> = meta.channelInfo.iter().map(|ch| ch.sensitivity).collect();
+            Recording::write_hdf5_attr_list(&file, "sensitivity", &sens)?;
+
+            // Timestamp
+            use chrono::DateTime;
+            let now_utc = chrono::Utc::now();
+            let timestamp = now_utc.timestamp();
+            Recording::write_hdf5_attr_scalar(&file, "time", timestamp)?;
+
+
+            // Create UUID for measurement
+            use hdf5::types::VarLenUnicode;
+            let uuid = uuid::Uuid::new_v4();
+            let uuid_unicode: VarLenUnicode = VarLenUnicode::from_str(&uuid.to_string()).unwrap();
+            Recording::write_hdf5_attr_scalar(&file, "UUID", uuid_unicode)?;
+
+            // Channel names
+            let chnames: Vec<VarLenUnicode> = meta
+                .channelInfo
+                .iter()
+                .map(|ch| VarLenUnicode::from_str(&ch.name).unwrap())
+                .collect();
+            let chname_attr = file
+                .new_attr::<VarLenUnicode>()
+                .shape([chnames.len()])
+                .create("channelNames")?;
+            chname_attr.write(&chnames)?;
+
+            // Create the dataset
+            let ds = Recording::create_dataset(&file, &meta)?;
+
+            // Indicate we are ready to rec!
+            *status.lock().unwrap() = RecordStatus::Recording(Duration::ZERO);
+
+            let mut ctr = 0;
+            let framesPerBlock = meta.framesPerBlock as usize;
+            let nchannels = meta.nchannels() as usize;
+            'recloop: loop {
+                match rx.recv().unwrap() {
+                    InStreamMsg::StreamError(e) => {
+                        bail!("Recording failed due to stream error.")
+                    }
+                    InStreamMsg::ConvertedStreamData(..) => {}
+                    InStreamMsg::StreamStarted(_) => {
+                        bail!("Stream started again?")
+                    }
+                    InStreamMsg::StreamStopped => {
+                        // Early stop. User stopped it.
+                        break 'recloop;
+                    }
+                    InStreamMsg::RawStreamData(incoming_ctr, dat) => {
+                        // if incoming_ctr != ctr {
+                        //     bail!("Packages missed. Recording invalid.")
+                        // }
+
+                        let tst = ndarray::Array2::<f32>::ones((framesPerBlock, nchannels));
+
+                        ds.resize((ctr + 1, framesPerBlock, nchannels))?;
+                        ds.write_slice(&tst, (ctr, .., ..))?;
+
+                        // match dat {
+                        //     RawStreamData::Datai8(d) => ds.
+
+                        // }
+                        let recorded_time = Duration::from_millis(
+                            ((1000 * (ctr + 1) * framesPerBlock) as Flt / meta.samplerate) as u64,
+                        );
+                        if !settings.duration.is_zero() {
+                            if recorded_time >= settings.duration {
+                                break 'recloop;
+                            }
+                        }
+                        // println!("... {}", recorded_time.as_millis());
+                        ctr += 1;
+                        *status.lock().unwrap() = RecordStatus::Recording(recorded_time);
+                    }
+                }
+            } // end of loop
+
+            *status.lock().unwrap() = RecordStatus::Finished;
+            Ok(())
+            // End of thread
+        });
+
+        Ok(Recording {
+            handle: Some(handle),
+            status: status2,
+            tx,
+        })
+    }
+
+    fn cleanupThreadIfPossible(&mut self) {
+        // println!("CleanupIfPossible()");
+        if let Some(h) = &self.handle {
+            if h.is_finished() {
+                // println!("Thread finished");
+                let h = self.handle.take().unwrap();
+                let res = h.join().unwrap();
+                if let Err(e) = res {
+                    *self.status.lock().unwrap() = RecordStatus::Error(format!("{}", e));
+                }
+            }
+        }
+    }
+
+    pub fn status(&mut self) -> RecordStatus {
+        self.cleanupThreadIfPossible();
+        self.status.lock().unwrap().clone()
+    }
+
+    /// Stop existing recording early. At the current time, or st
+    pub fn stop(&mut self) -> Result<()> {
+        if self.handle.is_none() {
+            bail!("Recording is already stopped.")
+        }
+
+        // Stope stream, if running
+        self.tx.send(InStreamMsg::StreamStopped)?;
+
+        let h = self.handle.take().unwrap();
+        let res = h.join().unwrap();
+        if let Err(e) = res {
+            *self.status.lock().unwrap() = RecordStatus::Error(format!("{}", e));
+        }
+
+        Ok(())
+    }
+}
+
+impl Drop for Recording {
+    fn drop(&mut self) {
+        let _ = self.stop();
+    }
+}
diff --git a/src/daq/streamhandler.rs b/src/daq/streamhandler.rs
new file mode 100644
index 0000000..98a3c68
--- /dev/null
+++ b/src/daq/streamhandler.rs
@@ -0,0 +1,18 @@
+
+use crossbeam::channel::unbounded;
+use super::*;
+
+/// A stream handler registers a queue in the stream manager, and keeps the other end to 
+/// get InStreamData from a running input stream.
+pub struct StreamHandler {
+    /// The receiving part of the channel on which (InStreamData) is received..
+    pub rx: Receiver<InStreamMsg>
+}
+impl StreamHandler {
+    /// Create new stream handler.
+    pub fn new(smgr: &mut StreamMgr) -> StreamHandler{
+        let (tx, rx) = unbounded();
+        smgr.addInQueue(tx);
+        StreamHandler{rx}
+    }
+}
\ No newline at end of file
diff --git a/src/daq/streammsg.rs b/src/daq/streammsg.rs
index b6c0ae1..416a4fe 100644
--- a/src/daq/streammsg.rs
+++ b/src/daq/streammsg.rs
@@ -1,18 +1,18 @@
 //! Provides stream messages that come from a running stream
 use crate::config::*;
-use crate::daq::DataType;
 use crate::daq::Qty;
+use crate::siggen::Siggen;
 use anyhow::{bail, Result};
 use crossbeam::channel::Sender;
-use reinterpret::reinterpret_slice;
+use reinterpret::{reinterpret_slice, reinterpret_vec};
 use std::any::TypeId;
 use std::sync::Arc;
 use std::u128::MAX;
 
-use super::daqconfig::DaqChannel;
+use super::*;
 
 /// Raw stream data coming from a stream.
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub enum RawStreamData {
     /// 8-bits integer
     Datai8(Arc<Vec<i8>>),
@@ -70,53 +70,79 @@ where
     }
 }
 
+// Create InStreamData object from
+impl<T> From<Vec<T>> for RawStreamData
+where
+    T: num::ToPrimitive + Clone + 'static,
+{
+    fn from(input: Vec<T>) -> RawStreamData {
+        // Apparently, this code does not work with a match. I have searched around and have not found the
+        // reason for this. So this is a bit of stupid boilerplate.
+        let i8type: TypeId = TypeId::of::<i8>();
+        let i16type: TypeId = TypeId::of::<i16>();
+        let i32type: TypeId = TypeId::of::<i32>();
+        let f32type: TypeId = TypeId::of::<f32>();
+        let f64type: TypeId = TypeId::of::<f64>();
+        let thetype: TypeId = TypeId::of::<T>();
+        if i8type == thetype {
+            let v: Vec<i8> = unsafe { reinterpret_vec(input) };
+            RawStreamData::Datai8(Arc::new(v))
+        } else if i16type == thetype {
+            let v: Vec<i16> = unsafe { reinterpret_vec(input) };
+            RawStreamData::Datai16(Arc::new(v))
+        } else if i16type == thetype {
+            let v: Vec<i16> = unsafe { reinterpret_vec(input) };
+            RawStreamData::Datai16(Arc::new(v))
+        } else if i32type == thetype {
+            let v: Vec<i32> = unsafe { reinterpret_vec(input) };
+            RawStreamData::Datai32(Arc::new(v))
+        } else if f32type == thetype {
+            let v: Vec<f32> = unsafe { reinterpret_vec(input) };
+            RawStreamData::Dataf32(Arc::new(v))
+        } else if f64type == thetype {
+            let v: Vec<f64> = unsafe { reinterpret_vec(input) };
+            RawStreamData::Dataf64(Arc::new(v))
+        } else {
+            panic!("Not implemented sample type!")
+        }
+    }
+}
+
 /// Stream metadata. All information required for
+#[derive(Clone, Debug)]
 pub struct StreamMetaData {
-    /// The number of channels. Should be <= MAX_INPUT_CHANNELS
-    pub nchannels: usize,
 
     /// Information for each channel in the stream
-    pub channelInfo: [DaqChannel; MAX_INPUT_CHANNELS],
+    pub channelInfo: Vec<DaqChannel>,
 
     /// The data type of the device [Number / voltage]
     pub rawDatatype: DataType,
 
     /// Sample rate in [Hz]
     pub samplerate: Flt,
+
+    /// The number of frames per block send over
+    pub framesPerBlock: u32,
 }
 impl StreamMetaData {
-    /// Create new metadata object. Throws an error if the number of channels for the sensitivity and quantities does
-    /// not match.
-    ///
+    /// Create new metadata object.
+    ///     ///
     /// # Args
     ///
-    /// * nchannels: The number of channels that are send
-    /// * sens: Sensitivity values for each channel
-    /// * rawdtype: The data type of the raw stream data. For sound cards this is Number, for DAQ's, this might be a voltage.
-    /// * qtys_: The physical quantities for each channel
-    /// * sr: The sample rate in \[Hz\]
-    ///
-    /// # Panics
-    ///
-    /// If the number of channels > MAX_INPUT_CHANNELS
-    pub fn new(channel_data: &[DaqChannel], rawdtype: DataType, sr: Flt) -> Result<StreamMetaData> {
-        if channel_data.len() > MAX_INPUT_CHANNELS {
-            bail!("Too many channels provided.")
-        }
-        let nchannels = channel_data.len();
-        let channelInfo: [DaqChannel; MAX_INPUT_CHANNELS] =
-            array_init::array_init(|_i: usize| DaqChannel::default());
-
+    pub fn new(channelInfo: &[DaqChannel], rawdtype: DataType, sr: Flt, framesPerBlock: u32) -> Result<StreamMetaData> {
         Ok(StreamMetaData {
-            nchannels,
-            channelInfo,
+            channelInfo: channelInfo.to_vec(),
             rawDatatype: rawdtype,
             samplerate: sr,
+            framesPerBlock,
         })
     }
+
+    /// Returns the number of channels in the stream metadata.
+    pub fn nchannels(&self) -> usize {self.channelInfo.len()}
 }
 /// Input stream messages, to be send to handlers.
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub enum InStreamMsg {
     /// Raw stream data that is coming from a device. This is interleaved data. The number of channels is correct and
     /// specified in the stream metadata.
@@ -138,7 +164,7 @@ pub enum InStreamMsg {
 
 /// Store a queue in a shared pointer, to share sending
 /// and receiving part of the queue.
-pub type SharedInQueue = Arc<Sender<InStreamMsg>>;
+pub type SharedInQueue = Sender<InStreamMsg>;
 /// Vector of queues for stream messages
 pub type InQueues = Vec<SharedInQueue>;
 
@@ -149,12 +175,16 @@ pub enum StreamCommand {
     /// Remove a queue to a running stream
     RemoveInQueue(SharedInQueue),
 
+    /// New signal generator config to be used
+    NewSiggen(Siggen),
+
     /// Stop the thread, do not listen for data anymore.
     StopThread,
 }
 
 /// Stream types that can be started
 /// 
+#[derive(PartialEq, Clone)]
 pub enum StreamType {
     /// Input-only stream
     Input,
@@ -179,5 +209,9 @@ pub enum StreamError {
 
     /// Device
     #[strum(detailed_message = "Device not available")]
-    DeviceNotAvailable
+    DeviceNotAvailable,
+
+    /// Logic error (something weird happened)
+    #[strum(detailed_message = "Logic error")]
+    LogicError
 }
diff --git a/src/filter.rs b/src/filter.rs
index 3380cc9..226b193 100644
--- a/src/filter.rs
+++ b/src/filter.rs
@@ -6,15 +6,16 @@
 use super::config::*;
 use anyhow::{bail, Result};
 use cfg_if::cfg_if;
-use numpy::ndarray::{ArrayD, ArrayViewD, ArrayViewMutD};
-use numpy::{IntoPyArray, PyArray1, PyArrayDyn, PyArrayLike1, PyReadonlyArrayDyn};
+
 use rayon::prelude::*;
 
 cfg_if! {
-if #[cfg(feature = "extension-module")] {
-use pyo3::exceptions::PyValueError;
-use pyo3::prelude::*;
-use pyo3::{pymodule, types::PyModule, PyResult};
+if #[cfg(feature = "python-bindings")] {
+    use numpy::ndarray::{ArrayD, ArrayViewD, ArrayViewMutD};
+    use numpy::{IntoPyArray, PyArray1, PyArrayDyn, PyArrayLike1, PyReadonlyArrayDyn};
+    use pyo3::exceptions::PyValueError;
+    use pyo3::prelude::*;
+    use pyo3::{pymodule, types::PyModule, PyResult};
 } else {} }
 
 pub trait Filter: Send {
@@ -38,7 +39,7 @@ impl Clone for Box<dyn Filter> {
 }
 
 /// # A biquad is a second order recursive filter structure.
-#[cfg_attr(feature = "extension-module", pyclass)]
+#[cfg_attr(feature = "python-bindings", pyclass)]
 #[derive(Clone, Copy, Debug)]
 pub struct Biquad {
     // State parameters
@@ -53,8 +54,8 @@ pub struct Biquad {
     a1: Flt,
     a2: Flt,
 }
-#[cfg(feature = "extension-module")]
-#[cfg_attr(feature = "extension-module", pymethods)]
+#[cfg(feature = "python-bindings")]
+#[cfg_attr(feature = "python-bindings", pymethods)]
 impl Biquad {
     #[new]
     /// Create new biquad filter. See [Biquad::new()]
@@ -178,13 +179,13 @@ impl Filter for Biquad {
 /// See (tests)
 /// ```
 #[derive(Clone, Debug)]
-#[cfg_attr(feature = "extension-module", pyclass)]
+#[cfg_attr(feature = "python-bindings", pyclass)]
 pub struct SeriesBiquad {
     biqs: Vec<Biquad>,
 }
 
-#[cfg(feature = "extension-module")]
-#[cfg_attr(feature = "extension-module", pymethods)]
+#[cfg(feature = "python-bindings")]
+#[cfg_attr(feature = "python-bindings", pymethods)]
 impl SeriesBiquad {
     #[new]
     /// Create new series filter set. See [SeriesBiquad::new()]
@@ -273,7 +274,7 @@ impl Filter for SeriesBiquad {
     }
 }
 
-#[cfg_attr(feature = "extension-module", pyclass)]
+#[cfg_attr(feature = "python-bindings", pyclass)]
 #[derive(Clone)]
 /// Multiple biquad filter that operate in parallel on a signal, and can apply a gain value to each
 /// of the returned values. The BiquadBank can be used to decompose a signal by running it through
@@ -310,8 +311,8 @@ pub struct BiquadBank {
     gains: Vec<Flt>,
 }
 
-#[cfg(feature = "extension-module")]
-#[cfg_attr(feature = "extension-module", pymethods)]
+#[cfg(feature = "python-bindings")]
+#[cfg_attr(feature = "python-bindings", pymethods)]
 /// Methods to wrap it in Python
 impl BiquadBank {
     #[new]
diff --git a/src/lib.rs b/src/lib.rs
index dea7cff..1f2c92c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -17,11 +17,11 @@ pub mod filter;
 pub mod daq;
 pub mod siggen;
 
-#[cfg(feature = "extension-module")]
+#[cfg(feature = "python-bindings")]
 use pyo3::prelude::*;
 
 /// A Python module implemented in Rust.
-#[cfg(feature = "extension-module")]
+#[cfg(feature = "python-bindings")]
 #[pymodule]
 #[pyo3(name="_lasprs")]
 fn lasprs(py: Python, m: &PyModule) -> PyResult<()> {
@@ -31,7 +31,7 @@ fn lasprs(py: Python, m: &PyModule) -> PyResult<()> {
 }
 
 /// Add filter submodule to extension
-#[cfg(feature = "extension-module")]
+#[cfg(feature = "python-bindings")]
 fn pyo3_add_submodule_filter(py: Python, m: &PyModule) -> PyResult<()> {
     // Add filter submodule
     let filter_module = PyModule::new(py, "filter")?;
diff --git a/src/siggen.rs b/src/siggen.rs
index d0bbf85..57c270a 100644
--- a/src/siggen.rs
+++ b/src/siggen.rs
@@ -1,4 +1,4 @@
-//! This module provide signal generators. 
+//! This module provide signal generators.
 //!
 //! # Examples
 //!
@@ -6,9 +6,10 @@
 //!
 //! ```
 //! use lasprs::siggen::Siggen;
-//! let mut wn = Siggen::newWhiteNoise();
-//! wn.setGain(0.1);
-//! wn.setMute(false);
+//! let mut wn = Siggen::newWhiteNoise(1);
+//! // Set gains for all channels
+//! wn.setAllGains(0.1);
+//! wn.setAllMute(false);
 //! let mut sig = [0. ; 1024];
 //! wn.genSignal(&mut sig);
 //! println!("{:?}", &sig);
@@ -16,8 +17,11 @@
 //! ```
 use super::config::*;
 use super::filter::Filter;
-#[cfg(feature="extension-module")]
+use dasp_sample::{FromSample, Sample};
+
+#[cfg(feature = "python-bindings")]
 use pyo3::prelude::*;
+
 use rand::prelude::*;
 use rand::rngs::ThreadRng;
 use rand_distr::StandardNormal;
@@ -107,91 +111,93 @@ impl Source for Sine {
     }
 }
 
-
-#[derive(Clone)]
 /// Signal generator. Able to create acoustic output signals. See above example on how to use.
 /// Typical signal that can be created are:
 ///
 /// * (Siggen::newWhiteNoise)
 /// * (Siggen::newSine)
 ///
+#[derive(Clone)]
 pub struct Siggen {
     // The source dynamic signal. Noise, a sine wave, sweep, etc
     source: Box<dyn Source>,
     // Filter applied to the source signal
-    prefilter: Option<Box<dyn Filter>>,
-    // If set, no dynamic signal source output is given
-    muted: bool,
-    gain: Flt,
-    DCOffset: Flt,
+    channels: Vec<SiggenChannelConfig>,
 }
+/// Multiple channel signal generator. Can use a single source (coherent) to provide multiple signals
+/// that can be sent out through different EQ's
 
 /// A struct that implements the Siggen trait is able to generate a signal.
 impl Siggen {
-    /// Set new pre-filter that filters the source signal
-    pub fn setPreFilter(&mut self, pref: Option<Box<dyn Filter>>) {
-        self.prefilter = pref.clone();
-    }
-    /// Set the gain applied to the source signal
-    ///
-    /// * g: Gain value. Can be any float. If set to 0.0, the source is effectively muted. Only
-    /// using (setMute) is a more efficient way to do this.
-    pub fn setGain(&mut self, g: Flt) {
-        self.gain = g;
+    /// Returns the number of channels this signal generator is generating for.
+    pub fn nchannels(&self) -> usize {
+        self.channels.len()
     }
+
     /// Create a white noise signal generator.
-    pub fn newWhiteNoise() -> Siggen {
-        Siggen::new(Box::new(WhiteNoise::new()))
+    pub fn newWhiteNoise(nchannels: usize) -> Siggen {
+        Siggen::new(nchannels, Box::new(WhiteNoise::new()))
     }
+
+    /// Set gains of all channels in signal generator to the same value
+    /// 
+    /// # Args
+    /// 
+    /// * g: New gain value
+    pub fn setAllGains(&mut self, g: Flt) {
+        self.channels.iter_mut().for_each(|set| set.setGain(g))
+    }
+
     /// Create a sine wave signal generator
     ///
     /// * freq: Frequency of the sine wave in \[Hz\]
-    pub fn newSineWave(freq: Flt) -> Siggen {
-        Siggen::new(Box::new(Sine::new(freq)))
+    pub fn newSineWave(nchannels: usize, freq: Flt) -> Siggen {
+        Siggen::new(nchannels, Box::new(Sine::new(freq)))
     }
 
     /// Create a new signal generator wiht an arbitrary source.
-    pub fn new(source: Box<dyn Source>) -> Siggen {
+    pub fn new(nchannels: usize, source: Box<dyn Source>) -> Siggen {
         Siggen {
             source,
-            prefilter: None,
-            muted: false,
-            gain: 1.0,
-            DCOffset: 0.0,
+            channels: vec![SiggenChannelConfig::new(); nchannels],
         }
     }
 
-    /// Generate new signal data.
-    ///
-    /// # Args
-    ///
-    /// sig: Reference of array of float values to be filled with signal data.
-    ///
-    /// # Details
-    ///
-    /// - When muted, the DC offset is still applied
-    /// - The order of the generation is:
-    ///     - First, the source is generated.
-    ///     - If a prefilter is installed, this pre-filter is applied to the source signal.
-    ///     - Gain is applied.
-    ///     - Offset is applied (thus, no gain is applied to the DC offset).
-    ///
-    pub fn genSignal(&mut self, sig: &mut [Flt]) {
-        if self.muted {
-            sig.iter_mut().for_each(|x| {
-                *x = 0.0;
-            });
-        } else {
-            self.source.genSignal_unscaled(sig);
-            if let Some(f) = &mut self.prefilter {
-                f.filter(sig);
+    /// Creates *interleaved* output signal
+    pub fn genSignal<T>(&mut self, out: &mut [T])
+    where
+        T: Sample + FromSample<Flt>,
+        Flt: Sample
+    {
+        let nch = self.nchannels();
+        let nsamples: usize = out.len() / nch;
+        assert!(out.len() % self.nchannels() == 0);
+
+        // No initialization required here, as the data is filled in in genSignal_unscaled
+        // Create source signal
+        let mut src = Vec::with_capacity(nsamples);
+        unsafe {
+            src.set_len(nsamples);
+        }
+        self.source.genSignal_unscaled(&mut src);
+
+        // Create output temporary vector
+        let mut chout = Vec::with_capacity(nsamples);
+        unsafe {
+            chout.set_len(nsamples);
+        }
+
+        // Write output while casted to the correct type
+        // Iterate over each channel, and counter
+        for (ch, channel) in self.channels.iter_mut().enumerate() {
+            // Create output signal, overwrite chout, as it 
+            channel.genSignal(&src, &mut chout);
+
+            let out_iterator = out.iter_mut().skip(ch).step_by(nch);
+            for (sampleout, samplein) in out_iterator.zip(&chout) {
+                *sampleout = samplein.to_sample();
             }
         }
-        sig.iter_mut().for_each(|x| {
-            // First apply gain, then offset
-            *x *= self.gain;
-            *x += self.DCOffset;
-        });
     }
 
     /// Reset signal generator. Applies any kind of cleanup necessary.
@@ -202,15 +208,88 @@ impl Siggen {
     ///
     pub fn reset(&mut self, fs: Flt) {
         self.source.reset(fs);
+        self.channels.iter_mut().for_each(|x| x.reset(fs))
+    }
+    /// Mute / unmute all channels at once
+    pub fn setAllMute(&mut self, mute: bool) {
+        self.channels.iter_mut().for_each(|s| {s.muted = mute;});
+    }
+}
+
+/// Signal generator config for a certain channel
+#[derive(Clone)]
+pub struct SiggenChannelConfig {
+    muted: bool,
+    prefilter: Option<Box<dyn Filter>>,
+    gain: Flt,
+    DCOffset: Flt,
+}
+impl SiggenChannelConfig {
+    /// Set new pre-filter that filters the source signal
+    pub fn setPreFilter(&mut self, pref: Option<Box<dyn Filter>>) {
+        self.prefilter = pref;
+    }
+    /// Set the gain applied to the source signal
+    ///
+    /// * g: Gain value. Can be any float. If set to 0.0, the source is effectively muted. Only
+    /// using (setMute) is a more efficient way to do this.
+    pub fn setGain(&mut self, g: Flt) {
+        self.gain = g;
+    }
+
+    /// Reset signal channel config. Only resets the prefilter state
+    pub fn reset(&mut self, _fs: Flt) {
         if let Some(f) = &mut self.prefilter {
-            f.reset();
+            f.reset()
+        }
+    }
+    /// Generate new channel configuration using 'arbitrary' initial config: muted false, gain 1.0, DC offset 0.
+    /// and no prefilter
+    pub fn new() -> SiggenChannelConfig {
+        SiggenChannelConfig {
+            muted: false,
+            prefilter: None,
+            gain: 1.0,
+            DCOffset: 0.,
         }
     }
 
-    /// Set mut on signal generator. If true, only DC signal offset is outputed from (Sigen::genSignal).
+    /// Set mute on channel. If true, only DC signal offset is outputed from (SiggenChannelConfig::transform).
     pub fn setMute(&mut self, mute: bool) {
         self.muted = mute
     }
+    /// Generate new signal data, given input source data.
+    ///
+    /// # Args
+    ///
+    /// source: Input source signal.
+    /// result: Reference of array of float values to be filled with signal data.
+    ///
+    /// # Details
+    ///
+    /// - When muted, the DC offset is still applied
+    /// - The order of the generation is:
+    ///     - If a prefilter is installed, this pre-filter is applied to the source signal.
+    ///     - Gain is applied.
+    ///     - Offset is applied (thus, no gain is applied to the DC offset).
+    ///
+    pub fn genSignal(&mut self, source: &[Flt], result: &mut [Flt]) {
+        if self.muted {
+            result.iter_mut().for_each(|x| {
+                *x = 0.0;
+            });
+        } else {
+            result.copy_from_slice(source);
+            if let Some(f) = &mut self.prefilter {
+                f.filter(&result);
+            }
+        }
+        result.iter_mut().for_each(|x| {
+            // First apply gain, then offset
+            *x *= self.gain;
+            *x += self.DCOffset;
+        });
+    }
 }
 
 #[cfg(test)]
@@ -221,7 +300,7 @@ mod test {
     fn test_whitenoise() {
         // This code is just to check syntax. We should really be listening to these outputs.
         let mut t = [0.; 10];
-        Siggen::newWhiteNoise().genSignal(&mut t);
+        Siggen::newWhiteNoise(1).genSignal(&mut t);
         println!("{:?}", &t);
     }
 
@@ -229,9 +308,20 @@ mod test {
     fn test_sine() {
         // This code is just to check syntax. We should really be listening to these outputs.
         let mut s = [0.; 9];
-        let mut siggen = Siggen::newSineWave(1.);
+        let mut siggen = Siggen::newSineWave(1, 1.);
         siggen.reset(1.);
         siggen.genSignal(&mut s);
         println!("{:?}", &s);
     }
+
+    // A small test to learn a bit about sample types and conversion. This
+    // is the thing we want.
+    #[test]
+    fn test_sample() {
+        assert_eq!(0.5f32.to_sample::<i8>(), 64);
+        assert_eq!(1.0f32.to_sample::<i8>(), 127);
+        assert_eq!(-1.0f32.to_sample::<i8>(), -127);
+        assert_eq!(1.0f32.to_sample::<i16>(), i16::MAX);
+
+    }
 }