If the on-board s/c filter is not buffered from the side chain insert (TRS) filters one might apply, I wondered if that meant it would result in a single, sharper filter, or if that nascent network is buffered from the TRS ports and, as Viitalahde wrote, therefore the resultant s/c filtering would be in two, different, but concurrent slopes (of non compression)....
Thanks,
Andrew
P.S., this is the "net" action I was wondering about possibly going on...
Also, if you have a step on your s/c switch that is open, rather than through a cap or jumper, then the audio will only be passed through the compressor with make-up gain, but no compression... could be a convenient step for comparisons...