Abstract

The article studies the problem of generalizing the concept of 'diatonic scale' for a given ambient chromatic of N tones: 'Which subset A⊂N shall be considered as a generalized diatonic scale?' Each generic type of well-formed scale has exactly two specific manifestations in chromatic universes, which are large ME*-scales, i.e. which are maximally even non-degenerate well-formed scales, whose cardinality exceeds half of the chromatic cardinality. A qualitative distinction between these two large ME*-scales of the same type can be comfortably made on the basis of the shuffled Stern-Brocot tree, which is introduced in Section 2. The shuffled Stern-Brocot tree represents the same abstract binary tree as the traditional Stern-Brocot tree, but has a different planar arrangement. Candidates and final choices for generalized diatonic scales are studied in Section 3. Candidates are those large ME*-scales A⊂N which are tightly generated by a prime residue class m mod N. According to this pro

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