FM Synthesizer For iPad YM2151, aka OPM is a single-chip FM synthesis implementation, an eight-channel four-operator sound chip.... Read more In Apps, Chiptune Apps, Drum Apps, Sequencing Apps, Synth Apps 80s synthesizer / FM Synthesizer / FM Synthesizer For iPad / ipad app / ipad synthesizer / iYM2151 0 likes0 views1 min