Symmetrical harmony uses equal interval steps to build a repeating pitch or root cycle. Because each step is the same size, the cycle has little built-in sense of a single tonic and can sound open, tense, or deliberately ambiguous.
A minor-third cycle from C moves through E-flat, G-flat, and A before returning to C. A tritone cycle alternates between two roots, such as C and F-sharp.
Hear the equal steps
Continue the roots through G-flat and A to complete the four-part minor-third cycle.
Try it
- Choose one equal step size, such as three, four, or six semitones.
- Build a short root cycle using that same interval each time.
- Break the symmetry with a contrasting chord or bass note when you want a clear arrival.
Key takeaway
Equal interval cycles create balance but weaken a single tonal center. Use a contrasting move when the music needs a clear destination.