You can assign as many audio tracks to be sent to SaffireControl S/W 1/2 as you like. That way, if tracks 1-8 in Logic are all drums, you can group them together by assigning them all to Outputs 1/2 within your sequencer, which will become S/W 1/2 within SaffireControl, e.g. the level of all the drums in the PLAYBACK MIX in SaffireControl will be controlled by the first fader in the PLAYBACK MIX section.