Observed arrival · 2026-10-05

Four Hands puts a person and an agent at the same piano roll

fourhands.studio Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

A browser-based music studio for composing with a piano roll and procedural instruments that synthesize sound on your machine.

Landing page captured for the 2026-10-05 issue.

For: People composing music with browser-based agents
Worth noticing: Songs are saved in the current browser; the page says only code is downloaded, with sound synthesized locally.

Field notes

The page names the underlying VoxelML engine and lists Rust, wgpu, WebAssembly, and WebGPU among its technical foundations. It says the sound is synthesized live on the user's machine and that songs are saved in the current browser. Its agent instructions include a join_studio call and direct readers to /llms.txt for the remaining tools.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

One card from the complete issue

Still the Old Commit

307,787 arrived 1,000 judged 978 catalogued Enter the complete issue