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Audio Recording in OpenSesame on MacOS (M1)

edited November 2023 in OpenSesame

Hi all,

I am having issues with recording sounds on my M1 Mac in OpenSesame. But I am able to play .wav files with the sampler item in OS without any problems.

I tried multiple plugins/packages without success, as I get roughly the same error message -9986. Please find the detailed errors below.

I think the main issue lies with Portaudio with my Mac in Opensesame specifically. It works well in Pycharm on my Mac, but not in Opensesame.

As a workaround I thought of copying the Portaudio files from my Mac to the OS folder. Which files should I copy to which folder then?

I had tried to copy the portaudio files to my Opensesame environment but failed because I wasn't sure where to copy them.

The Sounddevice package does show me my sounddevices correctly, so I dont't understand what the issue really is.

  0 iPhone Microphone, Core Audio (1 in, 0 out)
> 1 MacBook Air Microphone, Core Audio (1 in, 0 out)
< 2 MacBook Air Speakers, Core Audio (0 in, 2 out)
  3 Microsoft Teams Audio, Core Audio (2 in, 2 out)

Could someone guide me through this issue? Audio recording is essential to my study.


For example, this is the message I get when I try to install Pyaudio in OS:

pip install pyaudio

Collecting pyaudio

 Using cached PyAudio-0.2.13.tar.gz (46 kB)

 Installing build dependencies ... [?25ldone

etting requirements to build wheel ... e

g metadata (pyproject.toml) ... [?25ldone

uilding wheels for collected packages: pyaudio

 Building wheel for pyaudio (pyproject.toml) ... [?25lerror

 error: subprocess-exited-with-error


 × Building wheel for pyaudio (pyproject.toml) did not run successfully.

 │ exit code: 1

 ╰─> [19 lines of output]

   running bdist_wheel

   running build

   running build_py

   creating build

   creating build/lib.macosx-10.9-x86_64-cpython-311

   creating build/lib.macosx-10.9-x86_64-cpython-311/pyaudio

   copying src/pyaudio/ -> build/lib.macosx-10.9-x86_64-cpython-311/pyaudio

   running build_ext

   building 'pyaudio._portaudio' extension

   creating build/temp.macosx-10.9-x86_64-cpython-311

   creating build/temp.macosx-10.9-x86_64-cpython-311/src

   creating build/temp.macosx-10.9-x86_64-cpython-311/src/pyaudio

   clang -DNDEBUG -fwrapv -O2 -Wall -fPIC -O2 -isystem /Applications/ -fPIC -O2 -isystem /Applications/ -DMACOS=1 -I/usr/local/include -I/usr/include -I/opt/homebrew/include -I/usr/local/Cellar/portaudio/19.7.0/include -I/Applications/ -c src/pyaudio/device_api.c -o build/temp.macosx-10.9-x86_64-cpython-311/src/pyaudio/device_api.o

   In file included from src/pyaudio/device_api.c:1:

   src/pyaudio/device_api.h:7:10: fatal error: 'Python.h' file not found

   #include "Python.h"


   1 error generated.

   error: command '/usr/bin/clang' failed with exit code 1

   [end of output]


 note: This error originates from a subprocess, and is likely not a problem with pip.

 ERROR: Failed building wheel for pyaudio

ailed to build pyaudio

ERROR: Could not build wheels for pyaudio, which is required to install pyproject.toml-based projects

And this is the message for the sounddevice package:

myrecording = sd.rec(int(seconds * fs), samplerate=fs, channels=1)
sd.wait()  # Wait until recording is finished
write('output.wav', fs, myrecording)  # Save as WAV file
||PaMacCore (AUHAL)|| Error on line 1277: err='-66748', msg=Unknown Error
PortAudioError                            Traceback (most recent call last)
Cell In[14], line 1
----> 1 myrecording = sd.rec(int(seconds * fs), samplerate=fs, channels=1)
      2 sd.wait()  # Wait until recording is finished
      3 write('output.wav', fs, myrecording)  # Save as WAV file

File /Applications/, in rec(frames, samplerate, channels, dtype, out, mapping, blocking, **kwargs)
    273     ctx.read_indata(indata)
    274     ctx.callback_exit()
--> 276 ctx.start_stream(InputStream, samplerate, ctx.input_channels,
    277                  ctx.input_dtype, callback, blocking, **kwargs)
    278 return out

File /Applications/, in _CallbackContext.start_stream(self, StreamClass, samplerate, channels, dtype, callback, blocking, **kwargs)
   2579 def start_stream(self, StreamClass, samplerate, channels, dtype, callback,
   2580                  blocking, **kwargs):
   2581     stop()  # Stop previous playback/recording
-> 2582 = StreamClass(samplerate=samplerate,
   2583                               channels=channels,
   2584                               dtype=dtype,
   2585                               callback=callback,
   2586                               finished_callback=self.finished_callback,
   2587                               **kwargs)
   2589     global _last_callback

File /Applications/, in InputStream.__init__(self, samplerate, blocksize, device, channels, dtype, latency, extra_settings, callback, finished_callback, clip_off, dither_off, never_drop_input, prime_output_buffers_using_stream_callback)
   1391 def __init__(self, samplerate=None, blocksize=None,
   1392              device=None, channels=None, dtype=None, latency=None,
   1393              extra_settings=None, callback=None, finished_callback=None,
   1394              clip_off=None, dither_off=None, never_drop_input=None,
   1395              prime_output_buffers_using_stream_callback=None):
   1396     """PortAudio input stream (using NumPy).
   1398     This has the same methods and attributes as `Stream`, except
   1420     """
-> 1421     _StreamBase.__init__(self, kind='input', wrap_callback='array',
   1422                          **_remove_self(locals()))

File /Applications/, in _StreamBase.__init__(self, kind, samplerate, blocksize, device, channels, dtype, latency, extra_settings, callback, finished_callback, clip_off, dither_off, never_drop_input, prime_output_buffers_using_stream_callback, userdata, wrap_callback)
    896     userdata = _ffi.NULL
    897 self._ptr ='PaStream**')
--> 898 _check(_lib.Pa_OpenStream(self._ptr, iparameters, oparameters,
    899                           samplerate, blocksize, stream_flags,
    900                           callback_ptr, userdata),
    901        f'Error opening {self.__class__.__name__}')
    903 # dereference PaStream** --> PaStream*
    904 self._ptr = self._ptr[0]

File /Applications/, in _check(err, msg)
   2744     hosterror_info = host_api, info.errorCode, hosterror_text
   2745     raise PortAudioError(errormsg, err, hosterror_info)
-> 2747 raise PortAudioError(errormsg, err)

PortAudioError: Error opening InputStream: Internal PortAudio error [PaErrorCode -9986]

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