Question about Pyaudio and Linux

[Andrew Francis]

Hi Montreal Pythonistas:

I am trying to get a Python program to run. I am getting the following error. I

haven't found a good explanation. Does anyone have insights?

Thanks!,

Andrew

ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock

[je...@schurger.org]

Hi Andrew,

By any chance, do you have a customized alsa setup (maybe ~/.asoundrc) ?

Do you know what your program is trying to do ?

It looks like it try different way to find a sound card.

Jean

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[Andrew Frances]

Hi Jean:

Thanks for the reply! I didn't write the programme. However the code is reading from a Microphone and sending the

information to Google's speech service Dialogflow. I am running the example because I have developing my own and

having problems. My example uses sounddevice.

I don't have ~./asoundrc file on my machine.

Cheers,

Andrew

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[je...@schurger.org]

Hi Andrew, can you share your example ?

Jean

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[Andrew Frances]

Hi Jean:

Yes. The example causing the ALSA problem is at:

https://gist.github.com/dalequark/aa0385de55b97fe1e2950b6e1ead063c

I don't think it is the code but my Linux settings.

Cheers,

Andrew

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[je...@schurger.org]

Hi Andrew,

I guess that the pyaudio.PyAudio().open() call is failing (or complaining and blocking).

I suggest to list your also devices (aplay -L), and maybe see if some process are already using the input device (maybe jack, jack2, pulseaudio,…) fuser on /dev/snd/ devices can help.

Jean

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[Andrew Frances]

Hi Jean:

Thanks for the advice. I was using that program to figure out a mistake in my own code. Fortunately, I found my problem!

If I get enough work done, it will become the topic for a future Montreal Python talk!

Again, thanks for your help!

Cheers,

Andrew

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