search

radxa-build / radxa-cm3-io

Radxa ROCK 3 Compute Module IO Board
https://wiki.radxa.com/Rock3/CM3/radxacm3io
4 stars 0 forks source link

Mic audio recording do not work over 3.5mm CM3 I/O jack #6

Open Sfinx opened 4 months ago

Sfinx commented 4 months ago

The recording contains noise + cracks. cmd used:

arecord -D plughw:CARD=rockchiprk817,DEV=0 -V mono 1.wav
Sfinx commented 4 months ago

Image used: debian b27 xfce

usui95 commented 4 months ago

may be try this command arecord -D plughw:CARD=rockchiprk817,DEV=0 -V mono -f S16_LE -r 16000 -d 20 1.wav

Sfinx commented 4 months ago

It doesn't matter what bitrate or format is used with plughw - the MICBIAS voltage is absent at rk817 MIC input. It is definitely driver issue.