About Jazz Circle
What is Jazz Circle?
Jazz Circle is a free, interactive jazz theory tool built for musicians who want to understand harmony from the ground up. At its core is the Circle of Fifths — the fundamental map that connects all keys, chords, and scales in Western music.
Who is it for?
Whether you are a pianist exploring jazz for the first time, a guitarist learning chord voicings, or an experienced player drilling progressions in new keys, Jazz Circle gives you the theory tools you need in one place.
Features
- Interactive Circle of Fifths with all 24 major and minor keys
- Diatonic 7th chords with scale suggestions for each chord
- Piano keyboard visualization for chord voicings
- Common jazz progressions (ii-V-I, turnarounds, blues, and more)
- Audio playback with adjustable tempo
- Jazz standard analysis with chord charts and section breakdowns