Issue on sample rate in Ubuntu 20.04, no audio

Hello all. I am trying to listen to some numpy arrays generated from a neural net, and even following the steps of the recommended installation I always get the same error. Also, I noticed a problem when using the conda environment where I installed the libraries, is that I cannot see the “output” or “default” ALSA choice in soundcard.query_devices().

Currently it prints this error:

audio shape (31744,)
<  0 HDA NVidia: HDMI 0 (hw:0,3), ALSA (0 in, 8 out)
   1 HDA NVidia: HDMI 1 (hw:0,7), ALSA (0 in, 2 out)
   2 HDA NVidia: HDMI 2 (hw:0,8), ALSA (0 in, 8 out)
   3 HDA NVidia: HDMI 3 (hw:0,9), ALSA (0 in, 8 out)
   4 HDA NVidia: HDMI 4 (hw:0,10), ALSA (0 in, 8 out)
   5 HDA NVidia: HDMI 5 (hw:0,11), ALSA (0 in, 8 out)
   6 HDA NVidia: HDMI 6 (hw:0,12), ALSA (0 in, 8 out)
>  7 FCA1616: USB Audio (hw:1,0), ALSA (12 in, 0 out)
   8 HD-Audio Generic: ALC892 Analog (hw:2,0), ALSA (2 in, 2 out)
   9 HD-Audio Generic: ALC892 Alt Analog (hw:2,2), ALSA (2 in, 0 out)
  10 hdmi, ALSA (0 in, 8 out)
  11 input, ALSA (128 in, 0 out)
(1246976, 'PortAudio V19.7.0-devel, revision 147dd722548358763a8b649b3e4b41dfffbcfbb6')
Expression 'paInvalidSampleRate' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2050
Expression 'PaAlsaStreamComponent_InitialConfigure( &self->playback, outParams, self->primeBuffers, hwParamsPlayback, &realSr )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2724
Expression 'PaAlsaStream_Configure( stream, inputParameters, outputParameters, sampleRate, framesPerBuffer, &inputLatency, &outputLatency, &hostBufferSizeMode )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2845

<traceback>

File "/home/luis/anaconda3/envs/tensorflowpy37/lib/python3.7/site-packages/sounddevice.py", line 2738, in _check
    raise PortAudioError(errormsg, err)
sounddevice.PortAudioError: Error opening OutputStream: Invalid sample rate [PaErrorCode -9997]

I’ve tried everything, from changing the sample rate, to completely reinstall this. still I’m not sure what is happening here. The interesting thing is that when I deactivate the environment I get more options in the devices array:

  10 hdmi, ALSA (0 in, 8 out)
  11 pulse, ALSA (32 in, 32 out)
  12 input, ALSA (128 in, 0 out)
  13 default, ALSA (32 in, 32 out)

But I can’t actually test this since I’m not able to install the libraries I have in the conda env in the $user. Any idea on how to solve this? Thanks in advance.

[HaHeho]

@HaHeho thank you. I was able to solve this by just making a new environment and installing everything from scratch, which is strange. If you want I can share the environment.yml 👍

Great. Sometimes environments can get a bit scrambled up when changing a lot of packages, I suppose (using conda and pip inside is always a bit sketchy, since pip does not know what is going on outside). That’s why it’s good to setting up the environment with all packages simultaneously (like from a file), so conda can figure out all cross-dependencies.

BTW, a new problem appeared on my machine. I am just able to sd.play(np.array, sr) with blocking=True method. If I don’t have that, it just sends clicks (sort of granular) alongside the ALSA lib pcm.c:8526:(snd_pcm_recover) underrun occurred print in the terminal. Any idea of what this might be?

Take a look in this thread and see if it already helps to solve the issue with sd.play() .

[luisArandas]

Solved it! 👍 The sd.wait() function did it, now just need it not to stop the GUI forever, maybe go multithread. Thank you!