Free ROM Turns Your Vintage NES Into A MIDI Synthesizer

SynthNes is a free ROM that runs on an Everdrive N8 Pro flashcart, and a companion PC app that transforms your vintage NES into a MIDI-capable synthesizer.


  • Control all five NES audio channels via MIDI or included virtual keyboard
  • Expandable by connecting more NES’s
  • Easy to use PC interface
  • PDF manual
  • Modulation
  • Automation
  • Presets
  • Polyphonic operation
  • Unison mode
  • Animated graphics
  • Hidden surprises

Pricing and Availability

The ROM is available now as a free download. Donations to help support future development are welcome by the developer.

Note: If you need a hardware solution for the NES, you may want to check out Super MIDI Pak.