--show_audio_devices not showing all audio devices

[yezzer]

I am unable to get PvRecorder to use a different device index. I believe this is because it cannot access the correct audio device. Might this be a problem with miniaudio not returning all devices?

I can correctly record sample audio using:

arecord -D plughw:3,0 ~/test.wav -d 3

Using PvRecorder to record audio using device 3 fails with error:

File "/home/pi/.virtualenvs/cv/lib/python3.9/site-packages/pvrecorder/pvrecorder.py", line 78, in __init__
    raise self._PVRECORDER_STATUS_TO_EXCEPTION[status]("Failed to initialize pv_recorder.")
ValueError: Failed to initialize pv_recorder.

Output of arecord -l (this is expected behaviour)

**** List of CAPTURE Hardware Devices ****
card 3: seeed2micvoicec [seeed-2mic-voicecard], device 0: bcm2835-i2s-wm8960-hifi wm8960-hifi-0 [bcm2835-i2s-wm8960-hifi wm8960-hifi-0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

Output of --show_audio_devices (I believe i should be able to see the ReSpeaker capture device here)

index: 0, device name: Monitor of Built-in Audio Analog Stereo

Output of miniaudio get_captures()

[{'name': 'Monitor of Built-in Audio Analog Stereo', 'type': <DeviceType.CAPTURE: 2>, 'id': <cdata 'union ma_device_id *' owning 256 bytes>, 'formats': {2: '16-bit Signed Integer'}, 'minChannels': 2, 'maxChannels': 2, 'minSampleRate': 48000, 'maxSampleRate': 48000}]

Output of uname -r:

5.15.32-v7l+

Any ideas as to what I can try?

[ksyeo1010]

This is most likely the same issue as #28. We will be releasing a fix in the coming weeks.

[yezzer]

As some kind of update, I installed a forked driver of ReSpeaker, as Seeed Studio seem to have abandoned it. This fixed this issue.
respeaker/seeed-voicecard#325

[ksyeo1010]

I was trying to debug this issue. It turns out that the name of the card might be quite different from what you would expect. Can you run: pactl list sources and check the name of the device. See further down the output, and check in properties > alsa.card_name. You might find seeed-2mic-voicecard there. Can you confirm this? thanks.

[yezzerfv]

@ksyeo1010 not sure how much use it will be now, as in my previous comment I managed to get it working using an unofficial fork. But here's the output:

        State: SUSPENDED
        Name: alsa_output.platform-bcm2835_audio.analog-stereo.monitor
        Description: Monitor of Built-in Audio Analog Stereo
        Driver: module-alsa-card.c
        Sample Specification: s16le 2ch 48000Hz
        Channel Map: front-left,front-right
        Owner Module: 6
        Mute: no
        Volume: front-left: 32768 /  50% / -18.06 dB,   front-right: 32768 /  50% / -18.06 dB
                balance 0.00
        Base Volume: 65536 / 100% / 0.00 dB
        Monitor of Sink: alsa_output.platform-bcm2835_audio.analog-stereo
        Latency: 0 usec, configured 0 usec
        Flags: DECIBEL_VOLUME LATENCY 
        Properties:
                device.description = "Monitor of Built-in Audio Analog Stereo"
                device.class = "monitor"
                alsa.card = "0"
                alsa.card_name = "bcm2835 Headphones"
                alsa.long_card_name = "bcm2835 Headphones"
                alsa.driver_name = "snd_bcm2835"
                device.bus_path = "platform-bcm2835_audio"
                sysfs.path = "/devices/platform/soc/fe00b840.mailbox/bcm2835_audio/sound/card0"
                device.form_factor = "internal"
                device.string = "0"
                module-udev-detect.discovered = "1"
                device.icon_name = "audio-card"
        Formats:
                pcm

Source #1
        State: SUSPENDED
        Name: alsa_output.platform-soc_sound.stereo-fallback.monitor
        Description: Monitor of Built-in Audio Stereo
        Driver: module-alsa-card.c
        Sample Specification: s16le 2ch 44100Hz
        Channel Map: front-left,front-right
        Owner Module: 9
        Mute: no
        Volume: front-left: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB
                balance 0.00
        Base Volume: 65536 / 100% / 0.00 dB
        Monitor of Sink: alsa_output.platform-soc_sound.stereo-fallback
        Latency: 0 usec, configured 0 usec
        Flags: DECIBEL_VOLUME LATENCY 
        Properties:
                device.description = "Monitor of Built-in Audio Stereo"
                device.class = "monitor"
                alsa.card = "3"
                alsa.card_name = "seeed-2mic-voicecard"
                alsa.long_card_name = "seeed-2mic-voicecard"
                alsa.driver_name = "snd_soc_simple_card"
                device.bus_path = "platform-soc:sound"
                sysfs.path = "/devices/platform/soc/soc:sound/sound/card3"
                device.form_factor = "internal"
                device.string = "3"
                module-udev-detect.discovered = "1"
                device.icon_name = "audio-card"
        Formats:
                pcm

Source #2
        State: SUSPENDED
        Name: alsa_input.platform-soc_sound.stereo-fallback
        Description: Built-in Audio Stereo
        Driver: module-alsa-card.c
        Sample Specification: s16le 2ch 44100Hz
        Channel Map: front-left,front-right
        Owner Module: 9
        Mute: no
        Volume: front-left: 32845 /  50% / -18.00 dB,   front-right: 32845 /  50% / -18.00 dB
                balance 0.00
        Base Volume: 20724 /  32% / -30.00 dB
        Monitor of Sink: n/a
        Latency: 0 usec, configured 0 usec
        Flags: HARDWARE HW_MUTE_CTRL HW_VOLUME_CTRL DECIBEL_VOLUME LATENCY 
        Properties:
                alsa.resolution_bits = "16"
                device.api = "alsa"
                device.class = "sound"
                alsa.class = "generic"
                alsa.subclass = "generic-mix"
                alsa.name = "bcm2835-i2s-wm8960-hifi wm8960-hifi-0"
                alsa.id = "bcm2835-i2s-wm8960-hifi wm8960-hifi-0"
                alsa.subdevice = "0"
                alsa.subdevice_name = "subdevice #0"
                alsa.device = "0"
                alsa.card = "3"
                alsa.card_name = "seeed-2mic-voicecard"
                alsa.long_card_name = "seeed-2mic-voicecard"
                alsa.driver_name = "snd_soc_simple_card"
                device.bus_path = "platform-soc:sound"
                sysfs.path = "/devices/platform/soc/soc:sound/sound/card3"
                device.form_factor = "internal"
                device.string = "hw:3"
                device.buffering.buffer_size = "10576"
                device.buffering.fragment_size = "2644"
                device.access_mode = "mmap"
                device.profile.name = "stereo-fallback"
                device.profile.description = "Stereo"
                device.description = "Built-in Audio Stereo"
                module-udev-detect.discovered = "1"
                device.icon_name = "audio-card"
        Ports:
                analog-input: Analog Input (type: Analog, priority: 10000, availability unknown)
        Active Port: analog-input
        Formats:
                pcm```

[ksyeo1010]

so running the official driver, using --show_output_devices does not show Source 2 from above correct?

[ksyeo1010]

We have released a new version: #31. Can you try it out with latest changes?

[kenarsa]

closing due to inactivity. please re-open if needed.