The SaffireControl PRO allows the setup of one monitor mix which will feed all analogue outputs.
The input mixer can set the volume and pan position of all 26 inputs.
This mixer does not effect the audio going to the recording software. it effects the audio going to the outputs for direct monitoring.
The "Input Mix", "S/W" (software) slider for each of the analogue outputs pairs allows for an individual mix between input and output to be heard on the respective output pair.