Threeline

A bass transcription editor built on three rows: how long the note is, where it sits on the neck, and what it is called.

→ https://ubrowz.github.io/threeline/

The two files that get served:

• index.html — the landing page
• bass-notation.html — the editor itself, 329 KB

The editor is self-contained and works offline. Transcriptions are saved as plain .json on your own machine; nothing is uploaded anywhere.

Working on it

bass-notation.html is the editor and is edited directly — it has no build step and no dependencies. Open it in a browser and it runs.

index.html is generated. It embeds its images and notation so that it is a single file with no external requests, which makes the built page unreadable, so edit the source and rebuild:

# change the words, the layout, the styling
$EDITOR src/landing.html
python3 build.py

python3 build.py --check     # report only, write nothing

src/landing.html        the page: copy, styling, the audio player
src/assets/             the photograph and the screenshot
src/demo/               the notation shown on the page

The built index.html is committed because GitHub Pages serves it straight from the repository. The editor's size is measured during the build and stamped into both the download button and this file, so it cannot fall out of date.

The notation on the page is the editor's own output rather than a drawing of it. When the editor's rendering or playback changes, regenerate it — this drives the real editor in headless Chrome and keeps what it produces:

node src/demo/make-demos.mjs
python3 build.py

Licence

MIT — see LICENSE. Use it, change it, pass it on.