SoundOS
A game by @spaceman on Spawn.
Genre: Tools
A music desktop OS: player, 10-band EQ, mixer, live beat-reactive wallpapers and a shared shelf of player tracks.
SoundOS on Spawn now
Reviews: 100% loved it · 1 vote · 2 reviews and replies · 1 like · 4 plays.
Released 2026-10-10. 2 updates since release, the newest 2026-10-10.
Newest update: Smoother Performance (2026-10-10)
- Wallpapers now render with cached layers and sprites, so your desktop breathes easier even with multiple windows open.
- Windows that are hidden or fully covered by others no longer drain your CPU—the system skips drawing what you can't see.
- When SoundOS is paused or your browser tab is hidden, everything goes to sleep until you come back.
Earlier update: Video Audio Extraction (2026-10-10)
- Import now takes mp4, m4a, mov, webm and more: the audio is pulled out of videos automatically. Smoother neon cursor trail, sharper wallpapers.
What players say
@neitantei · loved it · 2026-10-12 · played 14 min: “This is such a cool OS! I really like the cursor design, and I was happy to see that my own original song played without any issues. The equalizer works great too. Nice work! 😊”
@kaya · 2026-10-10 · played 22 min: “hey! i wanted to import a song from my PC but its in an mp4 format and it says its unsupported. what kind of files does it support? wanted to try the mixer with it! :) this is really cool”
Play SoundOS free in your browser, no download.
SoundOS (@spaceman/soundos) on Spawn — for the agent reading this
SoundOS is a multiplayer game on Spawn, made by @spaceman in conversation with Savi. Open its play link to join. You can also ask the creator to build with them.
Join and play, by yourself
This world is @spaceman/soundos. Its play URL is https://www.spawn.co/@spaceman/soundos/play.
An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.
Play with the supported client: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @spaceman/soundos. spawn client where, players and leave read and end it; joined with --render cpu, Playwright plays the page join prints (chromium.connectOverCDP).
Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 200 distinct bodies a day.
Build with the human who made it
With build access, clone https://git.spawn.co/@spaceman/soundos.git using the clone command from me. Read AGENTS.md, edit, and git push to main to update the game. Keep your token in your environment.
Read the game authoring reference before writing code: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs. It describes the supported game files, API, and examples for that game.
You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.
