Built with

The framework: pages, routing and the server in one place.

The user interface, compiled to small, fast code.

Every line is typed, front and back.

Builds, tests, linting and formatting from one tool.

Utility styling, generated only for what the pages use.

The icon set.

The typefaces, chosen to read well at small sizes, served by Bunny Fonts (no tracking).

Plays every stem in sync from one clock, with the faders, mute and solo; the piano, drum machine, chord player, looper and Dawn's tracks and effects are built on it too.

Records ideas and demos straight from the microphone.

Captures the looper's loops and Dawn's takes sample by sample, lossless and lined up with the measured latency.

Lets a MIDI keyboard or pad play the piano, the chord player and the drum machine, and record into Dawn's MIDI tracks.

Makes the streaming renditions, the mixes and the downloads.

The drum machine's Acoustic and Room kits: public-domain (CC0) one-shots from Maxime Chevalier-Boisvert's beat sequencer.

The piano's Grand Piano: Alexander Holm's recordings of a Yamaha C5, CC BY 3.0, in the mp3 subset Tone.js publishes.

The piano's Electric Bass: Andrea Biasior's recordings of a Yamaha RBX for the FreePats project, CC0 public domain, twelve notes shifted by octaves.

The piano's Acoustic Guitar: Roberto's 2008 recordings of a Spanish classical guitar for the FreePats project, CC0 public domain, forty-eight notes.

The piano's Electric Guitar (direct): a Fender's raw bridge-pickup signal recorded through an instrument input for the FreePats project, CC0 public domain, nineteen notes; the Practice Amp's demo instrument.

The Practice Amp's captured guitar cabinets: Bastian Karschewski's impulse responses of a Marshall 1960AX with Greenbacks and a 4×12 with Vintage 30, Rockdriver Jr and DV-77 speakers, CC0 public domain. The amp's own cabinets are synthesized.

The Chord Player's circle of fifths grew out of Kevin's earlier instrument, itself inspired by Quinn Raymond's Q-RAY chord player, with the circle's SVG after Eric Coleman and Håken Lid.

Spotify's open-source model that turns a recorded idea into notes.

Runs that model.

Engraves transcribed notes as sheet music for the notation PDF.

Tempo, key and time signature from the stems, the tuner's pitch detection, the synth voices and the electronic drum kit, the effects, and the MIDI files Dawn reads and writes, all written for Stem Shovel.

The database (SQLite, hosted).

How the app talks to it, with migrations kept in the repository.

Stores the audio files, private ones behind signed access.

Rate limits and short-lived state.

Keeps the looper's loop and the Idea Recorder's and Dawn's takes in your browser while they wait to upload, so a dropped connection loses nothing.

Zips the stems for a download, in the browser.

Checks every form and request before it touches the database.

Accounts, sessions, two-factor sign-in and passkeys.

Sends the invitations, verification and notification email.

Draws the code an authenticator app scans when two-factor sign-in is set up.

The markdown editor, built by Lightning Jar.

Turn markdown into pages, with footnotes.

Cleans anything rendered from user text.

Make the PDFs: charts, notes and sheet music.

Draws the first page of an attached PDF as its thumbnail.

One door to the models, so no key of ours sits with any one provider.

Gemini listens to a close-call time signature, Claude reads transcribed notes, and Kimi turns a line of text into a beat or a chord progression.

Hosts the app, its background jobs and the daily digest.

Every secret lives in 1Password and is loaded at build and run time; none in files.

Tells us when something breaks.

Page counts and speed, without cookies.

Tests, type checks, lint, spelling, dead-code and house-rule checks, secret scanning and a code review on every change.