what a DX7 voice says about its own build, read from the packed bytes (no synth needed)
the FM algorithm, 1 to 32: how the six operators are wired
operator 6's feedback, 0 to 7
the voice's transposition in semitones from middle C, -24 to 24
what a DX7 voice says about its own build, read from the packed bytes (no synth needed)