Aux Cord

Generative synth studio

Pass the aux.

Type any phrase. Get a looping melody. Same words, same tune, every single time. Aux Cord hashes your text into sixteen steps and plays them through a small synth that lives in your browser tab.

Open the studio Hear a mixtape
16 steps 11 scales 4 waveforms 0 downloads
Neon mixing console with an aux cable plugged in A five-channel mixer with knobs, faders, level meters and a four by four pad grid. A magenta aux cable is plugged into the jack on the left. PASS THE AUX REC CH 1 CH 2 CH 3 CH 4 CH 5
Quick drop

Drop a phrase in the booth

Nothing plays on this page. Hit the button and the studio opens with your phrase loaded. You press play when you are ready, and it starts quiet.

Signal path

Four channels. Words in, tune out.

Every Aux Cord melody follows the same road. Nothing is random in the way that matters: change one letter and you get a new tune, keep the letters and you get the same one back.

Phrase
Letters and a text cursor

"pass the aux"

Lower-cased, trimmed, extra spaces squashed. "Pass The AUX" and "pass the aux" are the same song.

Text
Hash
Hexadecimal hash cellsFNV1a32b

seed 0x82A7314D

FNV-1a squeezes the text into one 32-bit number. That number is the seed for everything after it.

Seed
Scale

12 of 16 steps sounding

The seed rolls sixteen gates and sixteen small pitch moves. A scale keeps every note friendly with its neighbours.

Notes
Voice

Oscillator, envelope, a touch of echo. Pick sine, triangle, saw or square and press play.

Sound
Pad bank

Hit a pad

Off the shelf

Three tapes to start with

Each mixtape is just a phrase, a scale, a tempo and a waveform. Open one in the studio and every pad is yours to flip.

Night Bus Home

Slow, low and a little sleepy. D minor, soft triangle, long echoes.

Open in studio
Corner Store Neon

Buzzy square wave over a pentatonic scale. Sounds like an OPEN sign.

Open in studio
Orbit Lab

Whole-tone drift with no home note to land on. Floaty by design.

Open in studio

See all eight

House rules

DJ swagger, teacher's heart

The booth is loud in spirit and gentle in practice. Aux Cord exists to make the idea of turning data into sound feel like play, and then to show you exactly how the trick works so you can do it yourself.

  • Quiet by defaultVolume starts low. Past the loud line the page warns you and asks twice before it plays.
  • No autoplay. Ever.Sound only starts after you press play. Close the tab and it is gone.
  • Offline all the wayNo accounts, no servers, no tracking. The synth is a few hundred lines of code you can read.