Progression Lab
The Progression Lab is a workbench for chord movement: assemble progressions, hear them in time, and study the function of each change.
How to use it
- Pick a key, then build your sequence chord by chord.
- Play it back and listen for where the motion pulls and where it rests.
- Swap individual chords to test substitutions — hear the difference immediately instead of guessing.
Pro tips
- Rebuild a song you’re learning in here first — once you can see the progression, your hands learn it twice as fast.
- Take a finished progression to the Reharmonization Engine and let it suggest richer substitutions.