Songwriting
Chord progression looper.
Click in a progression eighth note by eighth note, and loop it. Practice soloing over it, write lyrics against it, work out a melody, or hear whether a progression actually holds together before you commit to it.
Key legend
Not a restriction, just a shortcut. Pick a key and these chords are handed to you as a starting point. The full picker below still has every chord regardless.
Each square is one eighth note. Click a square to place the selected chord there, for that eighth note only. Click and drag across squares to hold one chord over several. Click a filled square again to clear it.
Selected chord: C
Click a chord below, then click squares in the grid to place it.
What this is for
- Practicing a solo. Build the progression from the actual song, loop it, and work out target notes and phrasing against the real changes instead of guessing at timing from memory. See soloing over chord progressions for what to actually do once it is looping.
- Writing lyrics or a melody. Set it going and leave it running while you work. A steady loop at the right tempo does more for finding a vocal melody than singing over silence.
- Testing a progression before you commit to it. Chords that look fine written down do not always sit well together in time. Hearing them looped, with real timing, catches that fast.
- Working out chord changes mid bar. Because the grid is in eighth notes, you can put two or more chords inside one bar, the way most real songs actually move.
Straight, swing, and shuffle
Straight divides each beat evenly. Light swing delays every off beat eighth note slightly, giving a loping, laid back feel without sounding like a different genre. Heavy swing, or shuffle, pushes that delay further, toward a triplet feel, and is closer to a blues or old school rock and roll pocket. Because chords can now land on individual eighth notes, the swing is audible in the chord changes themselves, not just the click.
Every chord, any root
The picker below has every root and every common chord quality, and there is no separate voicing setting, because the chord you click is exactly the chord that plays. Pick Cmaj7 and you get a Cmaj7. The key legend above is only a shortcut for finding sensible chords fast. It never restricts what you can place.
What this does not do
This is a practice and writing tool, not a finished backing-track studio. It keeps the harmony and timing clear so you can work on the musical idea.
Last reviewed: August 2026