Christoph Eckert wrote: > > USB devices have descriptors that describe all mixer > > controls and their routing. ?You can find this information > > in the output of "lsusb -v" if you know what to look for. > > Phew, thanks a lot for this hint. Lots of output to read, but > otherwise it seems to offer all info I'd like to know. Quick guide: The bXxxxxID and bSourceID fields specify how the units/terminals are connected together. In the bmaControls field, index 0 has controls acting on all channels, while index 1 and greater specify controls acting on that specific channel only. HTH Clemens
