ChordMesh · The musicians' band app

Learn an instrument. Then learn to play it with someone.

Twenty-two instruments, every common type of each. Pick one and learn where its notes live. Add a second player and get a plan for how you sound together. Stay in tune while you're at it.

The mesh isn't a picture — it's the sound. Click to strum a chord, synthesized live in your browser.

The library22 instruments · 8 families · every common type
Everything playableTap the diagrams — notes are synthesized in your browser
Free to useNo account, no install, self-hostable
Classical guitar
Classical guitar · Guitars
Chromatic harmonica
Chromatic harmonica · Slider · 12 keys on one harp
Violin
Violin · Orchestral strings
Piano keyboard
Piano · Keys · 88 of them

Four things, done well

ChordMesh doesn't try to be a full course. It does the four things every first band actually needs — and it makes all of them hands-on.

From first note to first jam

01

Pick your instrument

Not just the instrument — the type. A first-harp player and a blues player carry different harmonicas; the library knows that.

02

Learn the layout

Tap the harmonica holes, guitar strings, piano keys and drum zones to hear where every note lives before you can play it.

03

Add a second player

The Duet Lab maps your two ranges, splits the register, and suggests the roles, keys and first exercise to try.

04

Tune up and play

Each tutorial teaches its instrument's tuning. Tune by ear or by microphone, hear the pairing in a four-bar demo, and make the first jam sound like a band.

Start anywhere

Eight families, one tutorial for every type inside them. These open their tutorials directly.

Browse all 22 instruments →

Ready for the first jam?

Pick an instrument, learn its notes, add a friend's, tune up — all on these pages, all in an afternoon.