diff --git a/src/daq/streamcmd.rs b/src/daq/streamcmd.rs
index b928de1..a6064b8 100644
--- a/src/daq/streamcmd.rs
+++ b/src/daq/streamcmd.rs
@@ -3,6 +3,7 @@ use super::streammgr::SharedInQueue;
 
 
 /// Commands that can be sent to a running stream
+#[derive(Debug)]
 pub enum StreamCommand {
     /// Add a new queue to a running INPUT stream
     AddInQueue(SharedInQueue),
diff --git a/src/daq/streammgr.rs b/src/daq/streammgr.rs
index b5f2324..0ca703d 100644
--- a/src/daq/streammgr.rs
+++ b/src/daq/streammgr.rs
@@ -2,7 +2,7 @@
 use super::*;
 use crate::{
     config::*,
-    siggen::{self, Siggen},
+    siggen::{self, Siggen, SiggenCommand},
 };
 use anyhow::{anyhow, bail, Error, Result};
 use api::StreamApiDescr;
@@ -122,7 +122,13 @@ impl StreamMgr {
         // value (not the Arc) has to be cloned.
         self.getStreamMetaData(st).map(|b| (*b).clone())
     }
+    #[pyo3(name = "siggenCommand")]
+    fn siggenCommand_py(&mut self, cmd: SiggenCommand) -> PyResult<()> {
+        self.siggenCommand(cmd)?;
+        Ok(())
+    }
 }
+
 impl Default for StreamMgr {
     fn default() -> Self {
         Self::new()
@@ -148,7 +154,7 @@ impl StreamMgr {
             devs: vec![],
             input_stream: None,
             output_stream: None,
-            siggen: None,
+            siggen: Some(Siggen::newSilence(1., 1)),
 
             #[cfg(feature = "cpal-api")]
             cpal_api: CpalApi::new(),
@@ -354,6 +360,7 @@ impl StreamMgr {
             .take()
             .unwrap_or_else(|| Siggen::newSilence(meta.samplerate, nchannels));
 
+        siggen.setAllMute(true);
         if siggen.nchannels() != nchannels {
             // Updating number of channels
             siggen.setNChannels(nchannels);
@@ -398,7 +405,7 @@ impl StreamMgr {
                         }
                     }
                 }
-                while tx.len() < 2 {
+                if tx.len() < 1 {
                     // Obtain signal from signal generator
                     siggen.genSignal(&mut floatbuf);
 
@@ -663,6 +670,40 @@ impl StreamMgr {
             StreamType::Output => self.stopOutputStream(),
         }
     }
+
+    /// Apply a signal generator command to control the output stream's signal
+    /// generator. see [SiggenCommand] for types of commands. Muting, setting
+    /// gain etc. A result code is given back and should be checked for errors.
+    pub fn siggenCommand(&mut self, cmd: SiggenCommand) -> Result<()> {
+        if let Some(stream) = self.output_stream.as_ref() {
+            stream
+                .commtx
+                .send(StreamCommand::SiggenCommand(cmd))
+                .unwrap();
+            return stream.commrx.recv().unwrap();
+        } else if let Some(stream) = self.input_stream.as_ref() {
+            // When its duplex, it should have a signal generator
+            if matches!(stream.streamtype, StreamType::Duplex) {
+                stream
+                    .commtx
+                    .send(StreamCommand::SiggenCommand(cmd))
+                    .unwrap();
+                stream.commrx.recv().unwrap()
+            } else {
+                return self
+                    .siggen
+                    .as_mut()
+                    .expect("siggen should be in rest pos")
+                    .applyCommand(cmd);
+            }
+        } else {
+            return self
+                .siggen
+                .as_mut()
+                .expect("siggen should be in rest pos")
+                .applyCommand(cmd);
+        }
+    }
 } // impl StreamMgr
 impl Drop for StreamMgr {
     fn drop(&mut self) {
diff --git a/src/filter/biquadbank.rs b/src/filter/biquadbank.rs
index c2fa116..6765f1b 100644
--- a/src/filter/biquadbank.rs
+++ b/src/filter/biquadbank.rs
@@ -2,7 +2,7 @@ use super::*;
 use super::seriesbiquad::*;
 use rayon::prelude::*;
 #[cfg_attr(feature = "python-bindings", pyclass)]
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 /// 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
 /// parallel filters, or it can directly be used to eq a signal. For the latter process, also a
diff --git a/src/filter/mod.rs b/src/filter/mod.rs
index 3903ca1..83807e3 100644
--- a/src/filter/mod.rs
+++ b/src/filter/mod.rs
@@ -4,6 +4,8 @@
 //! Contains [Biquad], [SeriesBiquad], and [BiquadBank]. These are all constructs that work on
 //! blocks of input data, and apply filters on it. TODO: implement FIR filter.
 #![allow(non_snake_case)]
+use std::fmt::Debug;
+
 use super::config::*;
 
 mod biquad;
@@ -23,7 +25,7 @@ pub use seriesbiquad::SeriesBiquad;
 pub use zpkmodel::{PoleOrZero, ZPKModel, FilterSpec};
 
 /// Implementations of this trait are able to DSP-filter input data.
-pub trait Filter: Send {
+pub trait Filter: Send + Debug {
     //! The filter trait is implemented by, for example, [Biquad], [SeriesBiquad], and [BiquadBank].
 
     /// Filter input to generate output. A vector of output floats is generated with the same
@@ -39,7 +41,6 @@ pub trait Filter: Send {
 }
 
 /// Implementations are able to generate transfer functions of itself
-
 pub trait TransferFunction<'a, T>: Send
 where
     T: AsArray<'a, Flt>,
diff --git a/src/lib.rs b/src/lib.rs
index dd05fcc..15ee0c7 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -63,6 +63,8 @@ fn lasprs(m: &Bound<'_, PyModule>) -> PyResult<()> {
     m.add_class::<siggen::Siggen>()?;
     m.add_class::<siggen::SiggenCommand>()?;
     m.add_class::<siggen::SweepType>()?;
+    m.add_class::<siggen::SiggenCommand>()?;
+    m.add_class::<siggen::Source>()?;
 
     // SLM
     m.add_class::<slm::TimeWeighting>()?;
diff --git a/src/siggen/siggen.rs b/src/siggen/siggen.rs
index f7fcee3..ee1e8d8 100644
--- a/src/siggen/siggen.rs
+++ b/src/siggen/siggen.rs
@@ -18,7 +18,7 @@ use std::slice::IterMut;
 /// * [Siggen::newSine]
 /// * [Siggen::newSilence]
 ///
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 #[cfg_attr(feature = "python-bindings", pyclass)]
 pub struct Siggen {
     // The source dynamic signal. Noise, a sine wave, sweep, etc
diff --git a/src/siggen/siggenchannel.rs b/src/siggen/siggenchannel.rs
index 64c03ef..bdca565 100644
--- a/src/siggen/siggenchannel.rs
+++ b/src/siggen/siggenchannel.rs
@@ -1,7 +1,7 @@
 use crate::config::*;
 use crate::filter::Filter;
 /// Signal generator config for a certain channel
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct SiggenChannelConfig {
     muted: bool,
     prefilter: Option<Box<dyn Filter>>,
diff --git a/src/siggen/siggencmd.rs b/src/siggen/siggencmd.rs
index 8d74287..9c55d9b 100644
--- a/src/siggen/siggencmd.rs
+++ b/src/siggen/siggencmd.rs
@@ -4,6 +4,7 @@ use crate::config::*;
 /// Messages that can be send to a given signal generator [Siggen], to change its behaviour
 
 #[cfg_attr(feature = "python-bindings", pyclass)]
+#[derive(Clone, Debug)]
 pub enum SiggenCommand {
     /// Change the source to a sine wave with given frequency.
     ChangeSource{
@@ -13,13 +14,13 @@ pub enum SiggenCommand {
 
     /// Reset the signal generator state
     ResetSiggen {
-        /// New sampling frequency \[Hz\]
+        /// Sampling frequency \[Hz\]
         fs: Flt,
     },
 
     /// Set all gains to value g
     SetAllGains {
-        /// Linear gain level to apply
+        /// Linear gain level to apply to all channels
         g: Flt,
     },
 
diff --git a/src/siggen/source.rs b/src/siggen/source.rs
index 3917e62..6101250 100644
--- a/src/siggen/source.rs
+++ b/src/siggen/source.rs
@@ -1,6 +1,7 @@
 //! All sources for a signal generator. Sine waves, sweeps, noise, etc.
 use super::sweep::{SweepParams, SweepType};
 use crate::config::*;
+use std::fmt::Debug;
 use std::ops::{Deref, DerefMut};
 
 /// Ratio between circumference and radius of a circle
@@ -14,7 +15,7 @@ use rand_distr::StandardNormal;
 /// Signal source for a signal generator. A signal source is capable of creating
 /// new signal data.
 #[cfg_attr(feature = "python-bindings", pyclass)]
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 pub struct Source {
     src: Box<dyn SourceImpl>,
 }
@@ -69,7 +70,41 @@ impl Source {
     }
 }
 
-#[derive(Clone)]
+#[cfg(feature = "python-bindings")]
+#[cfg_attr(feature = "python-bindings", pymethods)]
+impl Source {
+    #[staticmethod]
+    #[pyo3(name = "newSine")]
+    fn newSine_py(fs: Flt, freq: Flt) -> PyResult<Source> {
+        Ok(Self::newSine(fs, freq)?)
+    }
+    #[pyo3(name = "newSilence")]
+    #[staticmethod]
+    fn newSilence_py() -> Source {
+        Self::newSilence()
+    }
+    #[staticmethod]
+    #[pyo3(name = "newWhiteNoise")]
+    fn newWhiteNoise_py() -> Source {
+        Self::newWhiteNoise()
+    }
+    #[staticmethod]
+    #[pyo3(name = "newSweep")]
+    fn newSweep_py(
+        fs: Flt,
+        fl: Flt,
+        fu: Flt,
+        sweep_time: Flt,
+        quiet_time: Flt,
+        sweep_type: SweepType,
+    ) -> PyResult<Source> {
+        Ok(Self::newSweep(
+            fs, fl, fu, sweep_time, quiet_time, sweep_type,
+        )?)
+    }
+}
+
+#[derive(Clone, Debug)]
 /// Silence source. Most simple one does only send out a 0.
 struct Silence {}
 
@@ -85,7 +120,7 @@ impl SourceImpl for Silence {
     }
 }
 /// White noise source. Can be colored by applying a color filter to the source
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 struct WhiteNoise {}
 impl SourceImpl for WhiteNoise {
     fn genSignal_unscaled(&mut self, sig: &mut dyn ExactSizeIterator<Item = &mut Flt>) {
@@ -100,7 +135,7 @@ impl SourceImpl for WhiteNoise {
 }
 
 /// Sine wave, with configurable frequency
-#[derive(Clone)]
+#[derive(Clone, Debug)]
 struct Sine {
     // Sampling freq \[Hz\]
     fs: Flt,
@@ -212,7 +247,7 @@ impl DerefMut for Source {
 }
 
 /// Source for the signal generator. Implementations are sine waves, sweeps, noise.
-pub trait SourceImpl: Send {
+pub trait SourceImpl: Send + Debug {
     /// Generate the 'pure' source signal. Output is placed inside the `sig` argument.
     fn genSignal_unscaled(&mut self, sig: &mut dyn ExactSizeIterator<Item = &mut Flt>);
     /// Reset the source state, i.e. set phase to 0, etc
diff --git a/src/siggen/sweep.rs b/src/siggen/sweep.rs
index ef8e310..b7fa9c3 100644
--- a/src/siggen/sweep.rs
+++ b/src/siggen/sweep.rs
@@ -1,4 +1,6 @@
 //! Sweep signal generation code
+use strum_macros::{Display, EnumMessage};
+use strum::EnumMessage;
 use {
     crate::config::*,
     anyhow::{bail, Result},
@@ -9,23 +11,49 @@ const twopi: Flt = 2. * pi;
 /// Enumerator representing the type of sweep source to create. Used as
 /// parameter in [Siggen::newSweep].
 #[cfg_attr(feature = "python-bindings", pyclass)]
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Display, EnumMessage)]
 pub enum SweepType {
     /// Forward only logarithmic sweep, repeats itself
+    #[strum(message = "Forward logarithmic")]
     ForwardLog,
     /// Reverse only logarithmic sweep, repeats itself
+    #[strum(message = "Backward logarithmic")]
     BackwardLog,
     /// Continuous logarithmic sweep, repeats itself
+    #[strum(message = "Continuous logarithmic")]
     ContinuousLog,
 
     /// Forward only linear sweep, repeats itself
+    #[strum(message = "Forward linear")]
     ForwardLin,
     /// Reverse only linear sweep, repeats itself
+    #[strum(message = "Backward linear")]
     BackwardLin,
     /// Continuous linear sweep, repeats itself
+    #[strum(message = "Continuous linear")]
     ContinuousLin,
 }
 
+#[cfg(feature = "python-bindings")]
+#[cfg_attr(feature = "python-bindings", pymethods)]
+impl SweepType {
+    #[staticmethod]
+    fn all() -> Vec<SweepType> {
+        use SweepType::*;
+        vec![
+            ForwardLin,
+            ForwardLog,
+            BackwardLin,
+            BackwardLog,
+            ContinuousLin,
+            ContinuousLog,
+        ]
+    }
+    fn __str__(&self) -> String {
+        self.get_message().unwrap().into()
+    }
+}
+
 #[derive(Debug, Clone)]
 pub struct SweepParams {
     // These parameters are described at [Source::newSweep]