With my SoundBlaster Live! 5.1 digital model SB0220 EMU10K1 sound card,
it is difficult to remember the significance of all all the controls and
it would also be good to be able to attach notes to the controls
documenting their significance and appropriate settings.

On a more general note, a sound card calibration test suite would be
good for determining appropriate settings to avoid distortion and
unintended feedback.

A possible starting point may be the tool available from:

http://www.theory.physics.ubc.ca/soundcard/soundcard.html

Regards...