I am using a hifiberry DAC+ ADC pro with a raspberry pi 4 to record data from the Aux jack anaogue input (with both jumpers closed). I am using this shell command to record the data:
arecord -r 192000 --format S24_LE -D plughw:0,0 -d 2 ./data.wav && echo done &
When I first turn on the raspberry pi the data records perfectly, however every attempt to record after that results in only noise with no useful data being gathered. If I reboot the Pi I can get it to work again for the first try, but again all further attempts result only in noise.
Would really appreciate any help thanks!