I am interested in performing and composing in non-twelve tone scales, such as 19-EDO (aka 19-TET) or 31-EDO (aka 31-TET). While there are virtual synthesizers that allow you to play microtonal scales, all virtual synthesizers I have seen have 12 notes as part of their user interface. It also seems like all MIDI sequencers have 12 notes in their interface.

For 19-EDO, I want to be able to play 19 keys per octave on a virtual piano as in the image below!

enter image description here

Is writing on a single piano roll with 19 notes per octave possible in any existing software? Are there virtual synthesizers with a controllable number of keys per octave?

The hacky solution I have working right now uses Propellerhead Reason with the Microtune plugin and the Distributor via this Youtube Tutorial. For 19-EDO (and any tuning with between 12 and 24 notes per octave) I use two differently tuned virtual instruments to play all the notes in one octave! For 19-EDO, I have one tuned for the 12 black keys and one instrument for the 7 white keys.

1 Answer 1


For sound sources you can find information here. In my opinion, u-he plugins are especially great.

As for visual feedback - you can change your pianoroll layout to different tunnings in Reaper.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.