TUNING SYSTEMS
Pythagorean Intonation
-- it should be noted that this tuning system is a linear system, meaning that the intervals do not point back to themselves. The systems just continues up or down. If you start on a given note and travel in the same direction with the same interval you won't return to the starting note.
INTERVAL SIZE
minor 2
major 2/diminshed 3
minor 3/augmented 2
major 3/diminished 4
perfect 4/augmented 3
augmented 4/dim 5
perfect 5
minor 6/ augmented 5
major 6/diminished 7
minor 7/augmented 6
major 7
TWELVE TONE
INTERVAL SIZE
minor 2
major 2
minor 3
major 3
perfect 4
augmented 4
diminished 5
perfect 5
minor 6
major 6
minor 7
major 7
-- unlike the Pythagorean system, Equal Temperment is cyclic, meaning the the intervals will return to where it started, just in a different register. If you start on a note and continue in the same direction with the same interval you will end up on the same note, just in a different location.
Other Commonly Used Tuning Systems
The Cycle of 53
Mean Tone Temperament (Various Forms)
The Skhismic Temperament
Helmholtzian