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97 lines
4.3 KiB
97 lines
4.3 KiB
---
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fontfamily: dejavu
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fontsize: 16pt
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geometry: a4paper,margin=2cm
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---
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written by Holger Wirtz and Thierry Pottier
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Version 1.1 (July 2020)
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# What is MicroDexed?
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MicroDexed is a FM-Software-Synthesizer with six operators and much additional features.
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It is written in C/C++ for the microcontroller Teensy-3.6/4.x. The sound generation (msfa)
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from the free VST-plugin Dexed was used and a user interface was created using two encoders
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and an LCD display.
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For the original Dexed/msfa software take a look at [Dexed on Github](https://github.com/asb2m10/dexed) and
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[Music Synthesizer for Android on Github](https://github.com/google/music-synthesizer-for-android).
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<center><img src="images/MicroDexed1.jpg" width="250"/><img src="images/MicroDexed2.jpg" width="250"/></center>
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## Features
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* Compatible to a legendary FM synth with six operators from a famous Japanese manufacturer
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* MIDI interface:
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* DIN IN/OUT with software THRU (can be disabled, optional hardware THRU possible)
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* USB-Slave (for connecting to a PC)
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* USB-Master (for connecting keyboards)
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* Audio interface:
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* RCA stereo IN/OUT with audio THRU (daisy-chain your sound generators(adds a little bit of noise))
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* Onboard effects:
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* Chorus (mono)
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* Delay (mono, up to 500ms, with feedback)
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* Low-pass filter with resonance
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* Reverb (stereo)
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* Resonant low-pass filter
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* Mono sound engine with panorama controller before reverb
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* Up to 20 voices of polyphony
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* Up to 100 banks of 32 voices can be stored on an SD card
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* MIDI SYSEX compatible
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* Sounds can be edited with external editors like...
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* [EdiSyn](https://github.com/eclab/edisyn)
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* [Dexed-VST](https://asb2m10.github.io/dexed/)
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* [DX7 by Vstforx](https://dx7.vstforx.de/)
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* [Synthmata](https://synthmata.com/volca-fm/)
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* [KI generated DX banks](https://www.thisdx7cartdoesnotexist.com/)
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* Sending of Voice/Bank MIDI-SYSEX dumps
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* Receiving of Voice/Bank MIDI-SYSEX dumps
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* Voice-Parameter change via MIDI-SYSEX
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* Flexible MIDI controller settings with additional features
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* Modwheel, Pitchbend, Portamento, Breath-Controller, Aftertouch, Foot-Controller
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* Additional modes for most controllers (linear, inverse, direct)
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* Controller parameter change via MIDI-SYSEX
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* Additional MIDI-CCs
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* Bank select
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* Preset select
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* Volume
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* Panorama
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* Filter resonance
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* Filter cutoff
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* Delay time
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* Delay feedback
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* Delay volume
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* Storage of voice presets, effect presets and combinations of both as "performance" on SD card
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* Transpose, fine-tune, mono-mode
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* Note refresh options: normal or retriggered
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* Velocity level adaption
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* Three sound engines:
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* Modern : this is the original 24-bit music-synthesizer-for-android implementation.
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* 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.
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* 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.
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* Open-Source (https://codeberg.org/dcoredump/MicroDexed)
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<div style="page-break-after: always"></div>
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## Manuals
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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)
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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)
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## License
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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.
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## Credits & thanks
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* Dexed engine by Pascal Gauthier (asb2m10)
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* DX Synth engine (as part of Dexed): Raph Levien and the msfa team
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* PPPlay : Great OPL3 implementation, with documented code :D
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* Thierry Pottier: for extreme testing, discussing about different options, images and many good suggestions for UI handling
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* Lars Pelz: Testing and documentation
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