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RASPI 4B - cannot get audio-out to work #170

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wita-sec opened this issue Feb 14, 2023 · 1 comment
Open

RASPI 4B - cannot get audio-out to work #170

wita-sec opened this issue Feb 14, 2023 · 1 comment
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@wita-sec
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Describe the bug
I have setup a Raspberry Pi 4B Desktop edition.
uname -a tells me:
Linux berry 5.15.84-v8+ #1613 SMP PREEMPT Thu Jan 5 12:03:08 GMT 2023 aarch64 GNU/Linux
I have followed the step-by-step instructions of the Mycroft documents to install MycroftAI.
I can start Mycroft services and the mycroft-cli-client.
Client can process my (over the MIC) spoken uterances.

Problem: I cannot get audio out to work.
The mycroft-cli-client debug window however gives me a valid written answer on my uterance.

I tested MIC and audio out on the system, e.g. with arecord and aplay, this works well.

Log files
Here is an extract from the voice.log which probably shows what happens.
It would be great to get a hint from you whats going wrong in my environment.

2023-02-13 22:07:38.189 | INFO | 3923 | main:handle_wakeword:71 | Wakeword Detected: hey mycroft
Wiedergabe: WAVE '/home/pi/mycroft-core/mycroft/res/snd/start_listening.wav' : Signed 16 bit Little Endian, Rate: 48000 Hz, stereo
2023-02-13 22:07:38.622 | INFO | 3923 | main:handle_record_begin:41 | Begin Recording...
2023-02-13 22:07:42.533 | INFO | 3923 | main:handle_record_end:49 | End Recording...
2023-02-13 22:07:43.878 | INFO | 3923 | main:handle_utterance:76 | Utterance: ['how about the weather']
ALSA lib pcm.c:8545:(snd_pcm_recover) overrun occurred
ALSA lib pcm.c:8548:(snd_pcm_recover) cannot recovery from overrun, prepare failed: Input/output error
Expression 'alsa_snd_pcm_prepare( stream->capture.pcm )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 2932
Expression 'AlsaStart( stream, 0 )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 3246
Expression 'AlsaRestart( self )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 3313
Expression 'PaAlsaStream_HandleXrun( stream )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 4531

@wita-sec wita-sec added the bug label Feb 14, 2023
@wita-sec
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Solved: thanks to mycroft audio troubleshooting at https://mycroft-ai.gitbook.io/docs/using-mycroft-ai/troubleshooting/audio-troubleshooting.
Steps:
mycroft-config edit system
updated the aplay command to: "play_wav_cmdline": "aplay -D plughw:2,0 %1",
plughw:2,0 is audio-out of my USB audio card according to "aplay -l"

This is a bit wired, because plughw:2,0 is the pluseaudio default of my system, whereas Picroft uses hw:0,0 as its default.

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