A do-it-yourself GarageBand where every sound is code. Each page is a backing band synthesized in your browser from a chord chart, with no samples.
7 pages0 samplesWeb Audio
Dig inRecordsTapes
Arena rock
Drums, piano chords, bass and electric guitar fills that play a Nashville-number chart, with Energy and Fills dials.
84 bpm · Nashville chart · 5-song jukebox
J-pop · K-pop · C-pop
A piano-led band with strings, bells and zither in five styles, from piano ballad to city pop.
5 styles · 5-song mixtape
Bossa nova
A nylon-string guitar on the clave, with upright bass, brushes, and flute, piano and vibes trading answers.
5 styles · 5-song record
Marching band
A drumline of snares, tenors, five pitched basses and cymbals, with high and low brass and woodwinds, from a parade march to a stand tune.
5 styles · 5-song scoreboard
Fight song
The 1912 fight song, read note for note off the sheet music and played by a full marching band, with the words lit on a video board.
4 styles · B♭ · cut time
Instrument Lab
The shared instruments, measured against real recordings. Hear them side by side, take the blind test, or turn on the piano radio.
Library 0.9.0 · blind test · piano radio
Listen and measure
Play it a song, sing to it, or drop in a file. It finds the tempo, key, chords, pitch and loudness with signal processing, no AI, and nothing leaves the page.
Mic, tab or file · chart in numbers
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