Plastik is an FM synth or more accurately phase modulation synth inspired by the Yamaha OPL chips found in Ad Lib and Sound Blaster soundcards in the 80’s and 90’s, renowned for its plastic sound. It should be noted, however, that even though Plastik was made to produce the same overall qualities as the OPL chips, and even has some of its unique features the waveforms, the fixed vibrato and tremolo frequencies it makes no claim whatsoever to be a complete or accurate OPL emulator.
via Gameboy Genius