Microtonal chord explorer 2026
Nineteen
A 19-tone equal temperament chord explorer that ships as both an app and an Audio Unit.
Nineteen divides the octave into nineteen equal steps instead of twelve, which gives you distinct major and minor thirds that twelve-tone tuning has to compromise between. The app lets you walk the resulting chord space by ear.
It ships three ways: a standalone Mac app, an AUv3 instrument, and an MPE MIDI effect that retunes whatever synth you point it at. All three pass auval.