SciFi Synth is a Midi Visualisation Tool integrated with Unreal Engine Modular Synth.

Use your Midi Device like Midi Keyboard or Synth with Midi Connection to play with SciFi Synth or use your mouse.

To play with MIDI you need to have Midi Device (Midi Keyboard or Midi Drums and etc.) This product especially works fine with Midi Keyboards or Synthesizers because it represents the synth keyboard in UE4.

For sound generation used Modular Synth.

For use in other projects make sure the required plugins are enabled:

Plugins > Audio > Synthesis And DSP Effects

Plugins > Input Devices > MIDI Device Support

Video - https://youtu.be/PsndK_TB6Fk