SY77 is a 61-note velocity sensitive keyboard with aftertouch featuring 32 voices of polyphony – 16 for AFM voices and 16 for AWM2 sampled voices.
The structure of the synthesizer is based on 6 operators representing AFM synth part which features 45 algorithms, 3 feedback loops and 16 waveforms. The sound generation is also represented with 16-bit AWM2 sample ROM waveforms.
The multi-stage Time Variant Filters with resonance were integrated. There is a 16-track sequencer with a 16 000 note capacity onboard as well as 4 independent digital effects processors. Memory offers 128 preset and 64 user patches, 16 preset and 16 user multi-patches.
The 6-operator AFM synth engine is similar to the one from DX instruments. AWM2 sounds can be combined with AFM sounds which allows for amazing creativity. 16 AFM and 16 AWM2 voices of polyphony give 32 voices.
The instrument was used by 808 State, Skinny Puppy, Brian Eno, Europe, Toto, Vangelis, Chick Corea, and Front 242.