Tsunami board audio input

There is a stereo input pads on the Tsunami board, but I see nothing in the documentation on how this may be used. Can someone enlighten me? TIA

It’s barely covered in the INI section further down here Tsunami Super WAV Trigger Hookup Guide - SparkFun Learn


There isn’t a lot to it - you can mix the analog stereo inputs to combine with any other outputs (see photo, area = “Audio IN mixed to OUT:” with a selector)