I have one Synthesiser that I route all my midi to. I have several SynthesiserVoice but only one SynthesiserSound that I want played on all channels.
Since SynthesiserVoice doesn't keep track of what channel it's playing on, if I get a channel 1 note on and a channel 2 note off for the same note number, the same voice will start and stop.
I can make 16 copies of the same SynthesiserSound and set them all to a different channel, but that seems wasteful. Is that the expected way to do what I want?