Have been using a DAC+ Pro for a while and have been extremely happy with it. Recently, I purchased a DAC+ ADC Pro to test recording some audio and had some trouble getting audio into it.
I followed all of the instructions regarding overlays etc. I have been using arecord to test the capture, but was getting no input. I got it to work once, and couldn't figure out what it was.
It turns out, I need to run aplay first. Not sure if that activates the driver or something, but after I've run aplay after a reboot, arecord will work properly.
Do you happen to know why this is? Is there a way to get around it?
OS: Raspbian Buster Light
Linux kernel 4.19.97