ALSA errors on Raspberry Pi 3 using image v1.5

[Sean Howland]

ALSA lib pcm.c:2239: (snd_pc_open_noupdate) Unknown PCM cards.pcm.rear

ALSA lib pcm.c:2239: (snd_pc_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2239: (snd_pc_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm.c:2239: (snd_pc_open_noupdate) Unknown PCM cards.pcm.hdmi
ALSA lib pcm.c:2239: (snd_pc_open_noupdate) Unknown PCM cards.pcm.hdmi
ALSA lib pcm.c:2239: (snd_pc_open_noupdate) Unknown PCM cards.pcm.modem
ALSA lib pcm.c:2239: (snd_pc_open_noupdate) Unknown PCM cards.pcm.modem
ALSA lib pcm.c:2239: (snd_pc_open_noupdate) Unknown PCM cards.pcm.phoneline
ALSA lib pcm.c:2239: (snd_pc_open_noupdate) Unknown PCM cards.pcm.phoneline
Expression 'paInvalidSampleRate' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2048
Expression 'PaAlsaStreamComponent_InitialConfigure( &self->capture, inParams, self->primeBuffers, hwParamsCapture, &realSr )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2719
Expression 'PaAlsaStream_Configure ( stream, inputParameters, outputParameters, sampleRate, framesPerBuffer, &inputLatency, &outputLatency, &hostBufferSizeMode )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2843
Traceback (most recent call last):
  File "/home/pi/jasper-client/jasper.py", line 151, in <module> app.run()
  File "/home/pi/jasper-client/jasper.py", line 121, in run conversation.handleForever()
  File "/home/pi/jasper-client/client/conversation.py", line 31, in handleForever threshold, transcribed = self.mic.passiveListen(self.persona)
  File "/home/pi/jasper-client/client/mic.py", line 110, in passiveListen frames_per_buffer=CHUNK
  File "/usr/local/lib/python2.7/dist-packages/pyaudio.py", line 750, in open stream = Stream(self, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pyaudio.py", line 441, in __init__ self._stream = pa.open(**arguments)
IOError: [Errno -9997] Invalid sample rate


I'm using a Raspberry Pi 3 with a CM-Headphones chipset USB sound card, a TRRS headset w/ microphone for audio input, and a separate TRS headset for audio output. It's connected over ethernet to the network. Image 1.5, using branch master.

How can I fix this problem?

[Lee Melbourne]

 What mic setup (hardware) are you using? It is possible it doesnt support the sample rate that is hard coded into Jasper.

[Sean Howland]

It's a CM-Headphone chipset using a TRRS earbud+microphone setup for audio input (using the mic on the earbuds) and a separate headset/speaker from the same audio card.

[Matthew Curry]

type "aplay -l" and see what number it shows up as, and then you need to update it in /usr/share/alsa/alsa.conf and reboot.  Then ensure its setup right in alsamixer.  Is it USB?