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written by Holger Wirtz and Thierry Pottier
Version 1.1 (July 2020)
# What is MicroDexed?
MicroDexed is a FM-Software-Synthesizer with six operators and much additional features.
It is written in C/C++ for the microcontroller Teensy-3.6/4.x. The sound generation (msfa)
from the free VST-plugin Dexed was used and a user interface was created using two encoders
and an LCD display.
For the original Dexed/msfa software take a look at [Dexed on Github](https://github.com/asb2m10/dexed) and
[Music Synthesizer for Android on Github](https://github.com/google/music-synthesizer-for-android).
## Features
* Compatible to a legendary FM synth with six operators from a famous Japanese manufacturer
* MIDI interface:
* DIN IN/OUT with software THRU (can be disabled, optional hardware THRU possible)
* USB-Slave (for connecting to a PC)
* USB-Master (for connecting keyboards)
* Audio interface:
* RCA stereo IN/OUT with audio THRU (daisy-chain your sound generators(adds a little bit of noise))
* Onboard effects:
* Chorus (mono)
* Delay (mono, up to 500ms, with feedback)
* Low-pass filter with resonance
* Reverb (stereo)
* Resonant low-pass filter
* Mono sound engine with panorama controller before reverb
* Up to 20 voices of polyphony
* Up to 100 banks of 32 voices can be stored on an SD card
* MIDI SYSEX compatible
* Sounds can be edited with external editors like...
* [EdiSyn](https://github.com/eclab/edisyn)
* [Dexed-VST](https://asb2m10.github.io/dexed/)
* [DX7 by Vstforx](https://dx7.vstforx.de/)
* [Synthmata](https://synthmata.com/volca-fm/)
* [KI generated DX banks](https://www.thisdx7cartdoesnotexist.com/)
* Sending of Voice/Bank MIDI-SYSEX dumps
* Receiving of Voice/Bank MIDI-SYSEX dumps
* Voice-Parameter change via MIDI-SYSEX
* Flexible MIDI controller settings with additional features
* Modwheel, Pitchbend, Portamento, Breath-Controller, Aftertouch, Foot-Controller
* Additional modes for most controllers (linear, inverse, direct)
* Controller parameter change via MIDI-SYSEX
* Additional MIDI-CCs
* Bank select
* Preset select
* Volume
* Panorama
* Filter resonance
* Filter cutoff
* Delay time
* Delay feedback
* Delay volume
* Storage of voice presets, effect presets and combinations of both as "performance" on SD card
* Transpose, fine-tune, mono-mode
* Note refresh options: normal or retriggered
* Velocity level adaption
* Three sound engines:
* Modern : this is the original 24-bit music-synthesizer-for-android implementation.
* Mark I : Based on the OPL Series but at a higher resolution (LUT are 10-bits). The target of this engine is to be closest to the real DX7.
* OPL Series : this is an experimental implementation of the reverse-engineered OPL family chips, 8-bit. Keep in mind that the envelopes still need tuning.
* Open-Source (https://codeberg.org/dcoredump/MicroDexed)
## Manuals
A manual how you can build your own MicroDexed can be found here: [https://codeberg.org/dcoredump/MicroDexed/src/branch/master/doc/manuals/Build-Manual.pdf](https://codeberg.org/dcoredump/MicroDexed/src/branch/master/doc/manuals/Build-Manual.pdf)
A user manual can be found at: [https://codeberg.org/dcoredump/MicroDexed/src/branch/master/doc/manuals/MicroDexed-User_Manual/MicroDexed-User_Manual.pdf](https://codeberg.org/dcoredump/MicroDexed/src/branch/master/doc/manuals/MicroDexed-User_Manual/MicroDexed-User_Manual.pdf)
## License
MicroDexed is licensed under the GPL v3. The msfa component (acronym for music synthesizer for android, see https://github.com/google/music-synthesizer-for-android) stays under the Apache 2.0 license to be able to collaborate between projects.
## Credits & thanks
* Dexed engine by Pascal Gauthier (asb2m10)
* DX Synth engine (as part of Dexed): Raph Levien and the msfa team
* PPPlay : Great OPL3 implementation, with documented code :D
* Thierry Pottier: for extreme testing, discussing about different options, images and many good suggestions for UI handling
* Lars Pelz: Testing and documentation
