Scale Compendium by Bryan Appel, v1.5.1
This script will quantize incoming MIDI notes to a preset scale, of which over 30 are included along with their associated modes. Also included are an assortment of common triads and 7th chords.
Scales are organized in three banks. There are up to ten scales per bank, with each scale having a number of modes equal to the number of notes in the scale (except for the symetrical scales, which are a special case).
Press the SHIFT key to change banks. Use the SCALE knob to select the scale and the MODE knob to select the mode. The KEY knob changes the root note.
the STYLE knob determines what the script will do when it encounters a note outside the scale. STYLE 1 will filter out all out-of-scale notes; only notes in the scale will sound. STYLE 2 & 3 will move out-of-scale notes to the nearest scale note, but if there are two equally distant notes, STYLE 2 will move to the higher note while STYLE 3 will move to the lower note. STYLE 4 will always move up to the next scale step regardless of distance whereas STYLE 5 will always move down to the previous step. STYLE 6 will quantize toward the root, perfect fifth, or major or minor third whenever possible. STYLE 7 uses a random coin toss to determine whether to quantize up or down.