Brumm from Berlin Try it

Press.

Two apps, one engine, one husky. Everything on this page is free to use in reports about Brumm and Brumm Kids. Questions: hello@brumm.ai.

For grown-ups · brumm.ai

Brumm.

Brumm is a club-music instrument you play by humming, in your phone's browser. You hum two bars over a running beat, and they come back as an instrument inside the track, in time and in key; sing, and it comes back as your voice. Free, no account, no download; the resident, who runs the night, is a husky.

Feel free to quote it word for word.

Try it

The files.

For children · brumm.ai/kids

Brumm Kids.

Brumm Kids is a free music app for children in the phone's browser. A child hums or sings two bars, the app sets the melody in time and in key and plays it back in the beat, first with the child's voice, then as an instrument. No account, no ads, no purchases; the recordings stay on the phone, and sharing is only by a link that a grown-up makes behind a gate.

Feel free to quote it word for word.

Test it now

No sign-up: open brumm.ai/kids/app, Play, Brumm. Best with the phone's speaker.

Price
Free, no purchases, no subscription.
Account
None.
Runs
In the browser, made for the phone (Safari, Chrome). Nothing to install.
Ads
None. No tracking, no cookies, no third-party services.
Language
English and German. Reading isn't needed, Mika talks.
Data
The recording becomes notes on the phone. The server only counts page views and countries. In detail: privacy, for parents.
Sharing
Only a grown-up, behind a gate (hold a button, solve a times-table sum), with consent when a child's voice is in it. Every link can be deleted at once and is blocked for search engines.
School
A music lesson with a worksheet under CC BY: music lesson for primary school.
As of
October 2026

The files.

Who makes it.

Daniel Breyer, Berlin. Studied theoretical quantum physics, ten years of product development, among others for a streaming start-up at Deutsche Grammophon, twenty years of club music as one half of Acado. He built Brumm, an instrument you play by humming; Brumm Kids is the same technology, made usable for children. Plus Mika, a real husky from Berlin-Neukölln, who makes the beat in both apps: this is Mika. More on Daniel: the guy.

Contact.

hello@brumm.ai. For an interview, a test with a group of children, or a picture that isn't here: write to us.