nicholas slonimsky used this operation, non-generalized, to form 1300 scales by multiplying the symmetric tritones, augmented chords, diminished seventh chords, and wholetone scales by the sum of 3 factors which he called interpolation, infrapolation, and ultrapolation . the combination of interpolation, infrapolation, and ultrapolation, forming obliquely infra-interpolation, infra-ultrapolation, and infra-inter-ultrapolation, additively sums to what is effectively a second sonority. this second sonority, multiplied by the first, gives his formula for generating scales and their harmonizations.