Turn your device into an OPL3 MIDI Synthesizer.
Plug your device to your computer, or hook a MIDI USB master keyboard via an OTG cable to play with this low-latency OPL3 FM Synthesizer.
Built-in General MIDI 1.0 Bank
Record your tunes directly.
TODO
* Instruments editor
Thanks to Alexey Khokholov for its great OPL3 emulator