Intervallic

Perle also points out that structural coherence is most often achieved through operations on intervallic cells.

Stretching a small piano's octaves to match its inherent inharmonicity level creates an imbalance among all the instrument's intervallic relationships, not just its octaves.

Such transposition raises or lowers the overall pitch range, but preserves the intervallic relationships of the original scale.

The number of possible modes for any intervallic set is dictated by the pattern of intervals in the scale.