This feels like a really ignorant/basic question, but something about the MIDIBox/sammichSID universe confounds me: why, in SIDPlay mode, are three voices of the SID (on just one SID chip, right?) able to be accessed to play original game tunes, but the same multitimbral function is not available when playing the MIDIBox/sammichSID as a synth/sequencer? I get the sensation that I'm misunderstanding something fundamental about the SID and it's MIDIBox implementation, but I haven't been able to parse out what that misunderstanding might be for myself.