Cantabile recording more channels than needed. Suggestion

[hombremosca]

I'm on a scenario in which I need to process one input and produce four outputs. So it's necessary to enable four channels on Cantabile.
The problem is that when I record, four channels are recorded (being the latter three silent as I only connect the first input) and this takes four times the space on disk (and at 96khz & 24bit this is huge).
My suggestion is please add a 'Record' field for the channels on the 'Configure Master Bus' dialog, so we can select which channels should be recorded and which not. This would be awesome.