Audio Usage
Firefly-Q6490A uses an ES8390 as the sound card. Both the output channels and the input channels have two routes.
- INPUT1 <- Headphone jack recording
- INPUT2 <- Expansion Pin Header, for external line in
- OUTPUT1 -> Expansion Pin Header, for external line out
- OUTPUT2 -> Headphone jack playback
The sound service used by the system is ALSA + Pipewire
Playback
# You can set the volume first
# DACL and DACR are the volume of the left channel and the right channel respectively, the value range is 0~255
amixer -q -D hw:QCM6490IDP set DACL 200
amixer -q -D hw:QCM6490IDP set DACR 200
# Play
pw-play test.wav
pw-play test.mp3Recording
# Switch the input channel to channel 1
amixer -q -D hw:QCM6490IDP set "PGAL Select" "Line 1P"
amixer -q -D hw:QCM6490IDP set "PGAR Select" "Line 1N"
# Set the recording gain, the value range is 0~255
amixer -q -D hw:QCM6490IDP set ADCL 200
amixer -q -D hw:QCM6490IDP set ADCR 200
# Start recording
pw-record output.wav
# Play the recording
pw-play output.wav