EBOX-IMX8MM-SPK-OUT
From ICOP tech wiki
Headphone SPK-OUT Test
Plug in the cable.
# gst-launch-1.0 playbin uri=file:///path audio-sink=alsasink
The path could be WAV, MP3 or FLAC, etc.
After input the file, you can hear the sound from Headphone or SPK-OUT.
If you need to set the PCM volume (Audio decoder’s main volume), the volume range is from 0 to 127.
# amixer set Headphone 80
Recording test
Plug the MIC to the MIC-IN connector, and input the command below, and it will start to record. After the recording is finished, it will generate an audio file named test.wav.
# arecord -D hw:0,0 -r 48000 -c 2 -f S16_LE test.wav
Play the test.wav by the command below.
# aplay test.wav
