VOPM soft synth is an emulation of the Yamaha YM2151 (OPM) four-operator FM sound chip. OPM chip was popular in the 1980s and early 1990s. Videogame fans will most likely be familiar with the Sega Genesis (Megadrive), whose sound chip is a slight variation on the OPM – the OPN. The chip has also been used in countless arcade games including Paperboy, Outrun, Metal Slugs 1-5, and Street Fighter II.
Originally VOPM offers few soundbanks nicely grouped. There are basses, bells, pianos etc. There are more than 300 presets but it’s just the beginning 🙂 One of the KvrAudio forum members converted tons of Sega Genesis/Mega Drive VGM soundtracks into OPM format which can be imported into VOPM synth 🙂 Since the zip file contains around 10 000 soundtracks, and each track uses few sounds, it translates into thousands of new chip 16-bit / 8-bit sounds 🙂
VOPM doesn’t offer any effects like reverb or delay – just use external plugins 🙂
VOPM Audio Demo: