Realtime convolution and modulation implemented in the Yamaha SY99 in 1990
FM synthesis with samples frequency modulate one sample with another and in an algorithm with 8 operators this is real synthesis
(the DX7 used only sine waves and created a whole world of colors)
because you create new harmonics and overtones not present in the source hence a new sound and with the Halion capabilities !!!
this is real exploration farway better than granular synthesis.