Layer sounds at any volume
A storm over a coffee shop
What it does
Most of this works in the browser and on Windows. Where it doesn’t, the card says.
Save mixes and share them
A link opens the same mix in another browser
Bring your own audio
An audio file, or a YouTube link
Fade out on a sleep timer
In the browser, from five minutes to four hours
Install it, play offline
In the browser, once you’ve saved the built-in sounds
Closes to the tray, keeps playing
On Windows, with media keys and launch at startup
Get Murmur
Runs on Windows 10 (build 19041 or later) and Windows 11, on x64 and ARM64.
Version 1.0.0, released May 5, 2026
Latest releaseWindows won’t install Murmur until you trust its certificate. Each release comes with its own, so you trust it again for every update.
- Download the certificate
Grab
Murmur-1.0.0.cerfrom the release you’re installing. - Trust it
Right-click it, choose Install Certificate, and put it in Local Machine → Trusted People. Windows asks for admin approval.
- Run the bundle
Download the
.msixbundlefor your PC: x64 for most, arm64 for Snapdragon. Then double-click it.
Self-signing keeps releases free to publish. A Microsoft Store release may remove this step later.