The best you can have is turning Qsynth > Setup > Audio > Multiple JACK Outputs on and up with Audio Channels and/or Audio Groups... but I really can't tell much a thing on that cause I've never use it myself... note all of that are in fact FluidSynth provided options, not quite a Qsynth specific feature at all.
The best you can have is turning Qsynth > Setup > Audio > Multiple JACK Outputs on and up with Audio Channels and/or Audio Groups... but I really can't tell much a thing on that cause I've never use it myself... note all of that are in fact FluidSynth provided options, not quite a Qsynth specific feature at all.
Cheers