  1:        : sequencer
  2: [ 0- 0]: digital audio playback
  3: [ 0- 1]: digital audio playback
  4: [ 0]   : control
  5: [ 1- 0]: digital audio playback
  6: [ 1- 0]: digital audio capture
  7: [ 1- 1]: digital audio playback
  8: [ 1]   : control
 33:        : timer
