pulseaudio not working - linux raspberry pi

[steeley]

in you documentation it refers to pulseaudio: pa_get_default_devices_from_host(host)

where host can be also,oss,jack,or pulse

my system has pulseaudio woking fine with other apps. it also has jack working with other apps.

PYO can only see Alsa, and oss.

Does pulseaudio work?

[belangeo]

It works for me on Debian (although the doc is wrong in listing pulse in possible hosts). First, you need to find the 'pulse' device:

>>> from pyo import *
>>> pa_list_devices()
AUDIO devices:
0: IN, name: HDA Intel PCH: ALC298 Analog (hw:0,0), host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
0: OUT, name: HDA Intel PCH: ALC298 Analog (hw:0,0), host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
1: OUT, name: HDA Intel PCH: HDMI 0 (hw:0,3), host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
2: OUT, name: HDA Intel PCH: HDMI 1 (hw:0,7), host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
3: OUT, name: HDA Intel PCH: HDMI 2 (hw:0,8), host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
4: OUT, name: HDA Intel PCH: HDMI 3 (hw:0,9), host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
5: OUT, name: HDA Intel PCH: HDMI 4 (hw:0,10), host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
6: IN, name: sysdefault, host api index: 0, default sr: 48000 Hz, latency: 0.021333 s
6: OUT, name: sysdefault, host api index: 0, default sr: 48000 Hz, latency: 0.021333 s
7: OUT, name: front, host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
8: OUT, name: surround40, host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
9: OUT, name: surround51, host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
10: OUT, name: surround71, host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
11: OUT, name: hdmi, host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
12: IN, name: lavrate, host api index: 0, default sr: 44100 Hz, latency: 0.007755 s
12: OUT, name: lavrate, host api index: 0, default sr: 44100 Hz, latency: 0.007755 s
13: IN, name: samplerate, host api index: 0, default sr: 44100 Hz, latency: 0.007755 s
13: OUT, name: samplerate, host api index: 0, default sr: 44100 Hz, latency: 0.007755 s
14: IN, name: speexrate, host api index: 0, default sr: 44100 Hz, latency: 0.007755 s
14: OUT, name: speexrate, host api index: 0, default sr: 44100 Hz, latency: 0.007755 s
15: IN, name: pulse, host api index: 0, default sr: 44100 Hz, latency: 0.008685 s
15: OUT, name: pulse, host api index: 0, default sr: 44100 Hz, latency: 0.008685 s
16: IN, name: upmix, host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
16: OUT, name: upmix, host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
17: IN, name: vdownmix, host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
17: OUT, name: vdownmix, host api index: 0, default sr: 44100 Hz, latency: 0.005805 s
18: OUT, name: dmix, host api index: 0, default sr: 48000 Hz, latency: 0.021333 s
19: IN, name: default, host api index: 0, default sr: 44100 Hz, latency: 0.008685 s
19: OUT, name: default, host api index: 0, default sr: 44100 Hz, latency: 0.008685 s

It's 15 in the current state of my system. Then, you set the Server's in/out device:

>>> s = Server()
>>> s.setInOutDevice(15)
>>> s.boot()
>>> s.start()

The python process now appears in pulseaudio audio mixer:

[steeley]

Thanks for the information. Unfortunately this does not work for me. the device appears in pulseaudio mixer correctly- but with no sound. The Python script quits with an error. details below.

The systems is Raspberry pi Buster 64 bit, onboard sound disabled, Behringer USB222 audio interface. This all works perfectly with pulseaudio, Audacity, sox etc.

output from list_devices, I assume pulse is device (0):

Audio host APIS: ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM sysdefault ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM sysdefault ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM front ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround21 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround21 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround40 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround41 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround50 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround51 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround71 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM iec958 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM spdif ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM spdif ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value 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 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_a52.c:823:(_snd_pcm_a52_open) a52 is only for playback ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM iec958:{AES0 0x6 AES1 0x82 AES2 0x0 AES3 0x2 CARD 0} ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card 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 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM dmix 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 AUDIO devices: 0: IN, name: pulse, host api index: 0, default sr: 44100 Hz, latency: 0.008707 s 0: OUT, name: pulse, host api index: 0, default sr: 44100 Hz, latency: 0.008707 s 1: IN, name: default, host api index: 0, default sr: 44100 Hz, latency: 0.008707 s 1: OUT, name: default, host api index: 0, default sr: 44100 Hz, latency: 0.008707 s

python test tone script:

`from pyo import * import time

s = Server() s.setInOutDevice(0) s.boot() s.start()

a = Sine(mul=0.5).out() time.sleep(5) s.stop() s.shutdown()`

Error produce by this code:

ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM sysdefault ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM sysdefault ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM front ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround21 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround21 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround40 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround41 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround50 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround51 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround71 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM iec958 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM spdif ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM spdif ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value 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 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_a52.c:823:(_snd_pcm_a52_open) a52 is only for playback ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM iec958:{AES0 0x6 AES1 0x82 AES2 0x0 AES3 0x2 CARD 0} ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card ALSA lib pcm_hw.c:1822:(_snd_pcm_hw_open) Invalid value for card 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 ALSA lib confmisc.c:767:(parse_card) cannot find card '0' ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM dmix 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.c:8424:(snd_pcm_recover) underrun occurred Expression 'err' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 3355 Expression 'ContinuePoll( self, StreamDirection_In, &pollTimeout, &pollCapture )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 3907 Expression 'PaAlsaStream_WaitForFrames( stream, &framesAvail, &xrun )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 4285

[belangeo]

What is the version of your pulseaudio? Mine is 12.2, I had to upgrade to get rid of these errors.

See https://github.com/JuliaAudio/PortAudio.jl/issues/19

[steeley]

my version is already 12.2 (12.2-4+deb10u1+rpi3)

Also, I have built version 15.0.83 from source, and get the same problem.

pulseaudio and all other audio apps work perfectly.

Do II need a specific version? how to make this work?

[belangeo]

Is there an audio input configured in the system? Can you try pyo in output-only mode:

s = Server(duplex=0)

[steeley]

Ahh yes, that was the issue. Thanks.