I think this would be a great feature request. We should be able to select more that just the analog input channels to be recorded on the SD card. As far as I know, there is no way to do it in the current firmware. But you could use an Aux and send the Channels you want to it, then patch the Mix out on the back of the mixer back into an Input Channel on the mixer then select that Channel to be recorded in the Capture screen. Whew, that sounds complicated. LOL I hope this helps.