AutoTonic is a seriously comprehensive tool for getting your input notes to conform to your choice of nearly 25,000 scales. It runs as a standalone application rather than a MIDI plugin in your DAW, the idea being to transform the notes input by your MIDI controller so that you’re always playing in the selected key. When using AutoTonic, your actual playing is done on only the white notes of the keyboard, with the black notes acting only to change the scale that you’re playing through. This approach has actually been patented by AutoTonic, so you shouldn’t find it anywhere else.
AutoTonic may appeal more to the hardcore scale-heads out there, and must be used as a standalone application for live play via a controller, but if you fit into that particular Venn diagram, AutoTonic opens up new worlds of possibility with very little effort. We’d love to see a MIDI plugin version, with fewer scales, to match the way that most producers use software. autotonic.net