Music theory is the method of analyzing our musical system & describing relationships between tones. The true outcome of this theoretical system is the naming of everything (tones, relationships, chords, etc.), & relational description (how each thing relates to another).
The accepted traditional music theory of today is but one of many approaches to explain, describe, & name our musical system.
Derivative & Parallel ◊ The tale of two systems. Go
Lines of 7 ◊ Alternative the the Circle of 5ths for learning Major key signatures. Go
Circle of 5ths ◊ Traditional Major and minor key system learning tool. Go
Inversions ◊ Classical chord numbering system. This is a reference page. Go