Stretta Scale Rotation

Scale rotation differs from scale quantization in that quantization tries to find the nearest note, where scale rotation preserves intervallic movement at the expense of relative register. The advantage to preserving intervallic movement allows for mappings from scales with a differing number of notes. For example, you can transpose from a diatonic seven note scale to a pentatonic five notes scale without any repeated notes due to quantization collapse. The overall range may be larger as a result, however.

Pitch function is more accurately preserved with quantization because rotation will expand or contract intervallic distances if you're translating between pitch spaces with differing numbers of members.