I just got a Stereo card today for my 3B+ but it makes no sound despite many attempts. I was hoping to get this working with a Patchbox OS/MODEP setup but first I want to make sure the card is working. What’s the absolute basic OS setup for me to try it? Is this still valid: http://forum.audioinjector.net/viewtopic.php@t=3&start=130.html#p8688