RYMCast is a VGM player for Sega Genesis/Megadrive videogame music files. Based on our work for the RYM2612 Iconic FM Synthesizer, RYMCast is a highly accurate and genuinely sounding cross platform VGM player. It’s our humble contribution to the Sega Genesis/Megadrive community.


  • Cycle-accurate YM2612 emulation and output modeling, including Ladder Effect and filtering (uses the same audio engine as the RYM2612)
  • Individual scopes for each channels
  • Per channel mute and solo
  • VGM stream speed adjust
  • Sequencer-like pause function
  • Audio export to WAV, AIFF & FLAC formats
  • Stereo or multi track audio export
  • Instrument patch extractor (supports RYM2612’s .repatch and Deflemask‘s .dmp formats)

RYMCast patch export to RYM2612



What’s new in version 1.0.6

Please have a look at the CHANGELOG.


RYMCast was inspired by the venerable 16-bit Audiophile Project which we want to thank a lot for the initiative and the quality of their recordings. We often used them as reference audio material to fine tune even the smallest parameters of our rendering engine.

And if you’re seeking for Genesis VGM files on the web, chances are you’ll land on Project2612 which we humbly think should be considered public utility! Thanks to them and the wonderful community of contributors.


How do I use the drag'n'drop patch export feature?
Exported patches from YM channel 6 are “empty”. Can't I export PCM samples as well?

Feedback, suggestions, bug reports