I've been trying to use this USB Audio card: https://http2.mlstatic.com/tarjeta-de-sonido-usb-71-con-control-de-volumen-D_NQ_NP_904044-MCO31004989404_062019-F.webp as sound output and input.
I followed this tutorial: https://www.raspberrypi-spy.co.uk/2019/06/using-a-usb-audio-device-with-the-raspberry-pi/ and the output works as expected but when I try to record something using a 3.5mm microphone in the other socket, (https://www.importacioneswest.com/wp-content/uploads/2014/11/61jp2CwmoqL.SL1300-1024x1024.jpg) it only creates blank files.
Do I need to configure anything else?
I used the following command to record:
arecord --device=hw:1,0 --format S16_LE --rate 44100 -c1 -V mono test.wav
These are the cards the Pi recongnizes:
0 [ALSA ]: bcm2835_alsa - bcm2835 ALSA bcm2835 ALSA 1 [Device ]: USB-Audio - USB PnP Sound Device C-Media Electronics Inc. USB PnP Sound Device at usb-3f980000.usb-1.4, full spe
The capture devices:
**** List of CAPTURE Hardware Devices **** card 1: Device [USB PnP Sound Device], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0
And the mixer info:
Simple mixer control 'Speaker',0 Capabilities: pvolume pswitch pswitch-joined Playback channels: Front Left - Front Right Limits: Playback 0 - 151 Mono: Front Left: Playback 64 [42%] [-16.38dB] [on] Front Right: Playback 64 [42%] [-16.38dB] [on] Simple mixer control 'Mic',0 Capabilities: pvolume pvolume-joined cvolume cvolume-joined pswitch pswitch-joined cswitch cswitch-joined Playback channels: Mono Capture channels: Mono Limits: Playback 0 - 127 Capture 0 - 16 Mono: Playback 75 [59%] [14.06dB] [off] Capture 16 [100%] [23.81dB] [on] Simple mixer control 'Auto Gain Control',0 Capabilities: pswitch pswitch-joined Playback channels: Mono Mono: Playback [on]