When I use the CQ12T for a live performance, I record a bit of the band during soundcheck with the multitrack recording feature (using the “post gain“ source point).
When I do some final adjustments when playing back the recording, I have to disable the polarity inversions of some of the channels, as the recording is done “post polarity”, so the polarity inversion is “baked” into the recorded signal.
I sometimes forget this, or forget which channels were inverted, so I’d like to have a source point “pre polarity” so the recorded tracks are the same as the “live sound” versions.