diff --git a/lasp/device/lasp_cppdaq.cpp b/lasp/device/lasp_cppdaq.cpp
index b37a1f4..b0a21b6 100644
--- a/lasp/device/lasp_cppdaq.cpp
+++ b/lasp/device/lasp_cppdaq.cpp
@@ -154,14 +154,6 @@ Daq::Daq(const DeviceInfo &devinfo, const DaqConfiguration &config)
       throw runtime_error(
           "Output monitoring only possible when output is enabled");
     }
-    // Some sanity checks
-    if (eninchannels.size() != 4) {
-      throw runtime_error("Invalid length of enabled inChannels vector");
-    }
-
-    if (enoutchannels.size() != 1) {
-      throw runtime_error("Invalid length of enabled outChannels vector");
-    }
   }
 
 
diff --git a/lasp/device/lasp_cpprtaudio.cpp b/lasp/device/lasp_cpprtaudio.cpp
index cacad49..6168659 100644
--- a/lasp/device/lasp_cpprtaudio.cpp
+++ b/lasp/device/lasp_cpprtaudio.cpp
@@ -193,6 +193,13 @@ class AudioDaq: public Daq {
 
 
   void start(SafeQueue<void*> *inqueue, SafeQueue<void*> *outqueue) {
+    this->inqueue = inqueue;
+    this->outqueue = outqueue;
+    if(monitorOutput) {
+      this->outDelayqueue = new SafeQueue<void*>();
+
+    }
+
     if(isRunning()){
       throw runtime_error("Stream already running");
     }
@@ -209,6 +216,7 @@ class AudioDaq: public Daq {
   }
 
   void stop() {
+
     if(!isRunning()) {
       cerr << "Stream is already stopped" << endl;
     }
@@ -216,6 +224,9 @@ class AudioDaq: public Daq {
       assert(rtaudio);
       rtaudio->stopStream();
     }
+    if(inqueue) delete inqueue;
+    if(outqueue) delete outqueue;
+    if(outDelayqueue) delete outDelayqueue;
 
   }
   bool isRunning() const {return (rtaudio && rtaudio->isStreamRunning());}
diff --git a/lasp/device/lasp_daq.pyx b/lasp/device/lasp_daq.pyx
index ac59afd..99f0418 100644
--- a/lasp/device/lasp_daq.pyx
+++ b/lasp/device/lasp_daq.pyx
@@ -3,6 +3,7 @@ from .lasp_deviceinfo cimport DeviceInfo
 from .lasp_daqconfig cimport DaqConfiguration
 
 from cpython.ref cimport PyObject,Py_INCREF, Py_DECREF
+import numpy as np
 from .lasp_device_common import AvType
 
 __all__ = ['Daq']
diff --git a/lasp/lasp_avstream.py b/lasp/lasp_avstream.py
index 46156cc..14a7b16 100644
--- a/lasp/lasp_avstream.py
+++ b/lasp/lasp_avstream.py
@@ -59,9 +59,6 @@ class AvStream:
 
         self.input_sensitivity = np.asarray(self.input_sensitivity)
 
-        # Fill in numpy data type, and sample width
-        datatype = daqconfig.dataTypeIndex
-
         # Counters for the number of frames that have been coming in
         self._aframectr = Atomic(0)
         self._vframectr = Atomic(0)
@@ -88,6 +85,7 @@ class AvStream:
         self._daq  = Daq(device, daqconfig)
         self.blocksize = self._daq.nFramesPerBlock
         self.samplerate = self._daq.samplerate
+        self.dtype = self._daq.getNumpyDataType()
 
     def nCallbacks(self):
         """Returns the current number of installed callbacks."""
@@ -164,27 +162,23 @@ class AvStream:
             # the output buffer to zero
             noutput_cb = len(self._callbacks[AvType.audio_output])
 
-            shouldhaveoutput = (self.avtype == AvType.audio_output or
-                                self.daqconfig.duplex_mode)
-
-            if noutput_cb == 0 and shouldhaveoutput and outdata is not None:
-                outdata[:, :] = 0
-
             # Loop over callbacks
             if outdata is not None:
-                for cb in self._callbacks[AvType.audio_output]:
-                    try:
-                        cb(indata, outdata, self._aframectr())
-                    except Exception as e:
-                        print(e)
-                        return 2
+                try:
+                    if len(self._callbacks[AvType.audio_output]) == 0:
+                        outdata[:, :] = 0
+                    for cb in self._callbacks[AvType.audio_output]:
+                            cb(indata, outdata, self._aframectr())
+                except Exception as e:
+                    print(e)
+                    return 2
             if indata is not None:
-                for cb in self._callbacks[AvType.audio_input]:
-                    try:
-                        cb(indata, outdata, self._aframectr())
-                    except Exception as e:
-                        print(e)
-                        return 1
+                try:
+                    for cb in self._callbacks[AvType.audio_input]:
+                            cb(indata, outdata, self._aframectr())
+                except Exception as e:
+                    print(e)
+                    return 1
 
         return 0 if self._running else 1
 
@@ -199,8 +193,8 @@ class AvStream:
         self._vframectr <<= 0
         self._video_started <<= False
 
-        self._audiobackend.stop()
-        self._audiobackend = None
+        self._daq.stop()
+        self._daq = None
 
     def isRunning(self):
         return self._running()
diff --git a/lasp/lasp_record.py b/lasp/lasp_record.py
index 82f98f6..bcf9461 100644
--- a/lasp/lasp_record.py
+++ b/lasp/lasp_record.py
@@ -37,7 +37,7 @@ class Recording:
         if stream.avtype != AvType.audio_input:
             raise RuntimeError('Stream does not have any input channels')
         self.blocksize = stream.blocksize
-        self.samplerate = stream.input_samplerate
+        self.samplerate = stream.samplerate
         self._running = Atomic(False)
         self._running_cond = Condition()
         self.rectime = rectime
@@ -81,7 +81,7 @@ class Recording:
 
         self._ad = f.create_dataset('audio',
                                     (1, stream.blocksize, nchannels),
-                                    dtype=stream.input_numpy_dtype,
+                                    dtype=stream.dtype,
                                     maxshape=(None, stream.blocksize,
                                               nchannels),
                                     compression='gzip'
@@ -96,7 +96,7 @@ class Recording:
                                         compression='gzip'
                                         )
 
-        f.attrs['samplerate'] = stream.input_samplerate
+        f.attrs['samplerate'] = stream.samplerate
         f.attrs['nchannels'] = nchannels
         f.attrs['blocksize'] = stream.blocksize
         f.attrs['sensitivity'] = stream.input_sensitivity