gridsleep wrote:But what was indicated in the VZ article is that the Yamaha synths DON'T use FM, but Phase Modulation. And you seem to be saying that the DS-8 is closer to the Phase Distortion of the CZ synths? So, does the DS-8 actually use Phase Distortion, then, or is it true FM as in the VZ-1? The whole confusion is three different kinds of synth engine that do sort of the same thing but in different ways, and people indiscriminately calling them by whatever name comes to mind, rather than what the engine actually is doing.
Technically speaking, yes, Yamaha FM actually uses phase modulation - this is because it gives effectively the same results as true FM but is computationally simpler. So yes, the DS-8 is only FM to the extent that any of Yamaha's DX line is FM - but it isn't Casio's PD. Casio PD (used in the CZ series, not
used in the VZ-1) eschews Yamaha's flexible arrangement of independent operators modulating each other for a simpler approach of selecting between different skew patterns for its sine-table lookup, so no matter how similar they may be at the lowest level, there's still distinct differences in how PD and FM work.
The DS-8 looks kind of like a CZ-series synth at the user level because it locks the FM voice architecture into algorithm 4 to give two two-operator stacks that it presents as sort of like an analog subtractive synthesizer, like the CZ-series does, but it's still purely Yamaha underneath.