In order to facilitate composition in tuning systems with more (or less) than twelve tones to the octave, I used Max/MSP to create an environment in which the composer or performer can easily change the tuning such that the the octave is divided into d even tones.
The retuning is easy to understand: if d is set to, say, 14, any two notes 14 physical keys apart from each other will sound a perfect octave, and the notes in between will be even steps each one fourteenth of an octave.
You can also set a "pole," which will be the one note that sounds the same as it normally would - all the other keys will be retuned around it. Audio can be recorded, and an external MIDI controller can be set to contol d in real time.
