Four ambient scenes in one tab: rain on glass with real lightning, a crackling fireplace, a warp focus tunnel, and a hacker terminal. Each with its own procedural soundscape. Free on SevinHub, no signup.
I keep a scene running on my second monitor almost all day. Rain when I need to focus, a fireplace when I want to wind down, a warp tunnel when I am deep in code. I was bouncing between five different browser tabs and two noise apps to get there, so I built the thing I actually wanted: one tab, four scenes, each with its own sound, all running in the browser.
It is called SevinHub Ambient, it is free, and there is no signup. Here is what it does and why you might keep it open too.
What is it for?
Ambient scenes are only worth it if they earn their screen space. These do:
- Focus screen with built-in white noise. Rainfall or Warp with the sound on replaces your lofi tab and your noise app in one window. The rain audio is a genuine white-noise bed, not a loop.
- Stream and OBS backdrop. Capture the tab for a "starting soon" screen or a background layer. One key hides the whole interface so the frame is pure scene.
- Screensaver for any spare screen. Old tablet, spare TV, hallway monitor. Open the page, go fullscreen, walk away. No install, works offline once loaded.
- Wind-down ambience. The fireplace or a thunderstorm at low volume, lights off. Better than any looped video because nothing ever repeats.
- Party and office visuals. A projector plus the warp tunnel or a rainstorm is instant atmosphere. On a lobby screen it just says "we have taste."
The four scenes
Rainfall. Rain runs down a fogged window with warm bokeh lights behind it. This one has a real thunderstorm: forked lightning that actually branches across the sky, a proper double-flash, and thunder that arrives a beat later like real distance. There is a storm slider and a button to force a strike whenever you want one.
Hearth. A layered particle fire with a white-hot core, orange body, and red edges, plus rising embers, drifting smoke, and glowing logs. The crackle and pop audio fires on a slow random timer so it never sounds mechanical. A blaze slider takes it from candle to bonfire.
Warp. Fly through a starfield and soft nebula clouds at a speed you set, with a low engine hum underneath. This is the deep-work scene. Set the speed, go fullscreen, and the tunnel does the rest.
Breach. The movie hacker screen. It auto-runs a fake exploit, scans ports, cracks a hash, and lands on a pulsing ACCESS GRANTED before looping. Great as a prank, a stream prop, or an "I am extremely busy" decoy.
How it is built
Everything runs on a single HTML canvas with no backend and no libraries. The part most ambient tools skip is sound, so that is where I spent the time. Every soundscape is generated live with the Web Audio API: no audio files are downloaded. The rain is a filtered brown-noise bed plus a bandpass hiss, thunder is a sharp crack layered over a pitch-dropping boom and a sub-bass sweep, the fire is a low roar with randomized crackle transients, and the warp is two detuned oscillators with an airy sub. Because it is all procedural, it never loops and weighs almost nothing.
Sound starts automatically the moment you pick a scene, your scene, volume, and slider choices are remembered between visits, and the number keys jump straight between scenes.
How to try it
It lives at sevinhub.com/ambient. No signup, no email, no cookie banner. It also opens as a windowed app inside SevinOS if you want it alongside the other tools. Keyboard: 1-4 switch scene, S sound, F fullscreen, SPACE hides the interface for capture, and L forces a lightning strike in Rainfall.
If you liked the digital rain in Matrix Rain, this is the same idea widened into a whole mood board. Pick your headspace and disappear for a while.