Christoph Eckert wrote:
Each card is
different.
I'd like to mix my Terratec Aureon USB.
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.
BTW: I also googled to find a nice image showing the
signal
flow of AC97 cards, but I haven't been successful.
What all AC'97 codecs have in common is that they don't completely
conform to the standard. The datasheets (if they exist) usually
contain such a diagram.
HTH
Clemens