- Scales are the groups of notes used as "context" in most music.
- Tertian scales include the standard major and minor, many useful variations, and some oddities like the whole-tone scale.
- Tertian scale modulation describes the structure of 7-note tertian scales in terms of which can modulate to others by changing a single note.
- Tertian-complement scales include some nice pentatonic scales, and share lots of theory with tertians.
- Symmetric scales, a note about scales that repeat periodically.
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