On the DS-8, that was a very basic FM synth. Not too bad, but it took so much of the engine, so many parameters out of your hands, and I believe reduced it all to a pair of sliders and some basic algorithms. I believe it was also the DX9 engine of four operators. With those 32 algorithms on board the OPSIX, it's clearly something like the MOD7 engine which Yamaha seems happy to let other companies play with, while it uses its more advanced FM-X engine. I'll be curious to see if it uses the entire MOD7 synth with its filters, waveforms and modularish patchability. If it's essentially the MOD7 engine intact, you'll have a KORG version of the SY77 but with some real time control, which will be a good FM synth.