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Dexed is a multi platform, multi format plugin synth that is closely modeled on the Yamaha DX7. Under the hood it uses music-synthesizer-for-android for the synth engine.

The goal of this project is to be a tool/companion for the original DX7. Sound engine with ‘float’ value parameters, different waveform à la TX81z would be great but anything that goes beyond the DX7 should and will be a fork of this project. This is to keep the compatibility with the original machine.

Dexed is licensed on the GPL v3.


  • Multi platform (OS X, Windows or Linux) and multi format (VST, AU, LV2).
  • The sound engine music-synthesizer-for-android is closely modeled on the original DX7 characteristics.
  • 144 DAW automatable DX7 parameters available from one single panel.
  • Fully supports DX7 input and output Sysex messages; including controller change. This means that you can use this with a native DX7/TX7 as a patch editor and SysEx manager.
  • Each operator have a realtime VU meter to know which one is active.
  • Can load/save any DX7/TX7 SysEx programs. It is also possible to save a single program into a different SysEx file.

Version 0.9.5:

  • Added support for SCL/KBM microtuning.
  • Added initial support for MPE performance.
  • Upgraded build system to use JUCE 6.0 and build from locally acquired JUCE.
  • A Collection of small UI changes, including higher contrast GUI assets, better sub-window management, and mouse wheel support.
  • Added VST3 support.

Version 0.9.4:

  • Standalone application version of Dexed.
  • Midi learn support for MIDI CC messages.
  • More accurate detune for operators.
  • More accurate EG envelopes. thanks @jeremybernstein
  • Pitchbend now listen to any channels.
  • Fixed ‘clicking’ in mono mode.
  • Fixed implementation for MIDI CC 0x78 and 0x7B (All Sound Off / All Notes Off).
  • Windows/macOS installers.

Version 0.9.3:

  • Preliminary live operator level update.
  • Support for incoming parameter change messages.
  • More permissive on cartridge sysex type; the validation is now done on size (4104/4096 bytes).
  • Midi ‘All Note Off; 0x7B’ support.
  • Breakpoint values are now shown as notes. thanks @tico-tico.

Version 0.9.2:

  • Mark I engine is now the default engine.
  • Added operator mute switch.
  • Added Tune (MASTER TUNE ADJ) knob.
  • Correct feedback implementation for Algo 4 and 6.
  • Single click program select.
  • Fix SysEx issue with wrong machine ID.
  • Fix for parameter hosts values.

Version 0.9.1:

  • Mark I engine now uses 10-bit sine/exp tables. Still a work in progress but we are getting there.
  • More accurate FM feedback on the Mark I and OPL Series engine.
  • Wheel, Foot, Breath, Aftertouch modulation support.
  • Fixed the display of some more ‘complex’ algorithms.
  • Drop of .syx files in the cartridge manager.
  • Dexed data directory can now optionally reside in the same location where the binary is installed.
  • ‘Send current program to DX7’ in Cartridge Manager works as designed.
  • Support for SysEx streams (multiple SysEx messages in one .syx file).

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