10-second sound diary → music

10 seconds.
Infinite
layers.

Capture a sound. Collect your own fragments. Layer and mix them into music — all yours.

Sound connects. Music becomes.
写真が繋がれば映画になる。音が繋がれば、物語になる。

Open Neiro — it's free How it works
No install · PWA · Works on any device
neiro.app / my sounds
my mix · night-quiet 3 sounds · 10 sec
PLAYING
0 2s 5s 8s 10s
RR
Rooftop rain
rec yesterday
MB
Morning birds
rec 6:40 am
LH
Late-night hum
rec 1:03 am
tomorrow?
Layer your next 10 seconds
0:05 / 0:10
LOOP
What makes Neiro different

10-second capture

Hit record. 10 seconds. Done. No editing, no setup — just the sound you heard right now.

Layer your own sounds

Add today's 10 seconds on top of what you recorded before. Hear your archive grow into something bigger.

Loop & listen

Your mix loops seamlessly. Hear how your sound fits — or clashes — with what came before.

No install needed

Neiro is a PWA. Open it in your browser, record, post. Works on any device.

Turn your archive into a piece

MIX Studio

Pick your sounds

Choose any clips from your archive — a rainstorm from Tuesday, a late-night hum, whatever caught your ear.

◈ Natural ◌ Echo ∿ Wobble ● Warm

Set each texture

Give every sound its own character — dry and present, echoing, gently pitch-drifting, or warmly colored.

☀ Sunny ☂ Rainy ☾ Night-quiet 〜 Still breeze

Today's inner weather

Pick a mood and Neiro arranges everything to match: rhythmic sounds snap to a shared tempo, ambient sounds loop with seamless crossfades, a quiet generated foundation and shared reverb hold it all together.

Share or post

Export the finished mix, share a link, or post it back to your feed.

Open MIX Studio
Why I built this
The developer
@chunk_jp

I kept running into the same small moment: hearing something — a café hum, rain on a window, a half-formed guitar riff — and wanting to hand it to someone who would build on it, not just listen and move on. Every music app I tried assumed I wanted to finish something. Voice memo apps assumed I wanted to archive something. Neither one was built for the in-between: a sound that isn't done yet, waiting for someone else's next move.

The moment this became a real project was after I recorded ten seconds of rain against my window at 2am, half-asleep, not thinking about music at all. A week later I opened it again and layered a guitar line over it without planning to — and it suddenly felt like a conversation, not a file. That's the feeling I wanted to build a tool around: not composition, but accumulation.

Neiro is built so that nothing you post is ever "finished." Every clip stays open for someone — for now, that someone is the you of tomorrow — to record over, layer onto, or pull into MIX Studio and reshape entirely. No account needed, nothing leaves your browser until you choose to share it. It's less an app for making music and more a small, ongoing archive of moments that keep changing shape.

How it works

three steps · no account needed
1

Open in browser

Neiro is a PWA — no install, no app store. Just open it and you're in.

2

Record 10 seconds

Anything. A sound, a melody, the rain. No editing needed — raw is the point.

3

Layer or mix

Post your clip to your feed, layer it on your earlier sounds, or take them all into MIX Studio. Your archive keeps growing.

Start layering — Open Neiro
No install · No account · Open on any device