MIDI channel (or address) is a static property of a MIDI track, which hold its own preset (bank/program) and that's all quite engraved in stone, sorry!
However you may insert the calf-fluidsynth on a MIDI output bus, so that all tracks/channels will converge throught it, and thus take advantage of it's allegedly multi-tmbrality as featured in SF2 spec.
i'm afraid to say... nop.
MIDI channel (or address) is a static property of a MIDI track, which hold its own preset (bank/program) and that's all quite engraved in stone, sorry!
However you may insert the calf-fluidsynth on a MIDI output bus, so that all tracks/channels will converge throught it, and thus take advantage of it's allegedly multi-tmbrality as featured in SF2 spec.
is that any clear?