PANDIATONICISM

Pandiatonicism is produced by strictly confining harmonic material to a given scale (i.e.,with no chromatic, or out-of-scale, intrusion). This concept can be applied to any scale,but it is most commonly used in tonal and modal contexts. The technique is similar toconstant structures, but the intervals of all voicings are adjusted so as to conform to thescale of the moment. The spacing may be uniform or variable.

In the 20th and 21st centuries, composers sometimes used the diatonic collection, but without making anyattempt to make a specific pitch sound like the the pitch center. Such examples are not tonal, nor are theymodal; instead, they are considered pandiatonic. Igor Stravinsky often wrote pandiatonic passages; manycan be heard throughout the opening of his ballet Petrushka