Hi! I have just pushed atest (https://github.com/uli/atest). It's a tool to automatically verify operation of analog audio hardware remotely (i.e. without being able to listen to the output) using a loopback cable between the analog audio input and output. It works by sending a message encoded by a HAM radio codec (Q15X25) out on the output and decoding whatever arrives at the input. It sends a different message on every channel and can thus detect if channels are swapped around. Details on using it (especially on how to set up the mixers) can be found in the README file. Have fun! CU Uli
