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© 2026 Luxury American Brands LLC
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A labs.llc instrument
Twenty-four bars,
written while you wait.
Pick a composer and this page writes a sheet: a subject and its answer, a period that asks and answers, a cell that gets developed until it has nowhere left to go. It engraves the result on a grand staff, plays it with instruments you choose, and prints it black on white.
The music is generated by LABS. It is pastiche — not a single bar of it is by Bach or by anybody else, and none of it is a database of quotations. Each of the five is a formal plan written out in code, and the manual at the bottom of this page says exactly what each plan does.
5Composers
11Instruments
12Keys
24Bars a sheet
The desk
Choose a hand.
Compose
24 bars
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Composer
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G compose · Space play or pause · ←→ a bar · F fit
Take it away
The seed is the whole sheet. The same composer, key and seed give the same twenty-four bars on any machine, for ever — so a link is a score.
Composed here
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Transport
bar 1
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Rewind and fast forward seek — they move the playhead and the music carries on from there rather than starting again. Speed can be changed while it is playing. Alt-click anywhere on the staff to jump to that beat.
Write on it
Duration
Pitch
Mark the selected note
Typing lands on
Click a note to select it. Shift-click or double-click a staff to put a note where you clicked; Backspace removes the selected one. 1–6 pick a duration, [ ] move the octave, and the row zsxdcv is a keyboard that writes into the last bar. An over-long bar is allowed and announced — it engraves crammed and exports exactly as written.
The instruments
One of eleven per staff — each a signal chain, not a sample
Play along
Take a staff
On what
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The staff you take is silenced, not removed: it stays engraved, the playhead still runs through it, and the other staff plays underneath you. Leave the count-in on and you get four beats of wood block before the first bar.
Take it away
Ten ways off this page.
Export
This sheet
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Open one
A placard carries its serial twice — printed on the card and written inside the file — so dropping the card here reopens the sheet, and so does typing the code off a photograph of it.
Print and PDF come out black on white in both editions. The dark edition is a way of reading the page, not a property of the music, and a sheet printed white-on-black costs a cartridge. The PDF is paginated onto US Letter with a half-inch margin.
The audio exports are rendered offline through the same eleven instruments and the same mix the Play button uses, so the file sounds like the page. Every staff sounds in an export, including one you have taken for playing along. The film records in real time — leave this tab in front while it does.
How it works
What is actually being done.
The five plans
Each composer is a formal plan, twenty-four bars long, with the harmony and the rhythm written into the code. A seeded generator picks the contours, the accompaniment cells and the sequence directions; the shape does not move.
The eleven instruments
All eleven are built with Web Audio when the note sounds. There are no samples on this page and nothing is downloaded to make a sound.
The seed
A sheet is a composer, a key and a 32-bit number. The number goes through a MurmurHash finaliser and then a linear congruential generator, and every decision the composer makes comes off that one stream — so the same three values give the same sheet on any machine. Copy a link and you have sent a score, not a recording.
What this page will not claim
The music is pastiche written by LABS. It is not by the composers it is named after, it does not quote them, and it is not trained on them. Bach's plan has a real stretto in it — the lower voice enters two beats behind the upper — and Vivaldi's cadence really does group eight quavers as three, three and two against four beats, because both were built. Nothing here claims invertible counterpoint, and nothing claims a tie, because neither was built.
Everything happens in this tab. Nothing is uploaded, no sheet is stored on a server, and the only thing kept between visits is your instrument choice and a sheet you have edited by hand, both in this browser's own storage.
The time signature
Four-four, in all five plans. The beaming groups by the crotchet, which is right in four-four and would be wrong in six-eight, so six-eight is not offered rather than offered badly.