Coltrane Changes
Coltrane changes move the tonal centre by major thirds, cycling through three key areas with a ii–V into each. This is advanced territory — the trainer arrives once the core progressions feel easy.
All twelve keys
In C: C△7 · E♭7 · A♭△7 · B7 · E△7 · G7. Each page loops the form with a vamp, shows the chord-scale for every chord on piano and guitar, and lets you tap any note.