The Pitch Palette software from Justonic, Inc. includes a dynamic intonation MIDI keyboard retuning program. The program tunes chords according to their root and the key they belong to. Root and key can be guessed by the software, or they can be specified via another MIDI device (an organ pedalboard, for instance). The Pitch Palette also includes a sequencer in which MIDI files can be annotated with root and key information and played back using their tuning algorithms. It is not clear whether the root and key guessing is done only on the basis of currently depressed keys, as in Waage's proposal [27][29], or uses information about recently-depressed keys as well.
A feature of this system that certainly goes beyond Waage's proposal is that the user can redesign the tuning of a chord so that when the system recognizes that it is being played, the user's tuning, not the default tuning, is used. Combined with the fact that each chord can be assigned a separate tuning depending on what the current root is, a wide variety of versions of the same chord can be played if another MIDI device is used to do root selection. This approaches the flexibility of the dynamic intonation software presented in this thesis, at the cost of added complexity for the performer. The advantage of such a system is that the score is not needed beforehand, so improvisation is possible, as well as freedom from the inevitable shortcomings of a score follower.