Classic FM synthesis combined with ROM-based sounds make this vintage digital synthesizer a true classic (albeit challenging to master). TG77 patches should also work with SY77.
Very raw aggressive mono bass. Sharp attack, quick release. Almost square wave sounding. Bright resonant filter mapped to CC74.
Evolving voice. Harsh. Descending digital airplane. More than a minute long. Panning warbling sub frequencies. Shocking bright release.