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A spectrum that reads as notes.

Every partial lands on the spoke of the note it actually is, so a ringing frequency shows up as a pitch you can name. That ring at 2.5 kHz? It's a D♯7, a hair sharp.

This is the soundcheck. The app is quicker, does far more, and is free on iPhone and Android in November. Premium adds your session card, 5‑minute clips and premium themes. See the app

Your seatFOHThe mix position. Best sound in the room, by definition.
Playing
What
A band, with a ring at 2.5 kHz
From
Bass, chords, a tune and one ringing frequency
Made
Synthesized for this page. The ring sits a hair sharp of D♯7.

Your set list.

  1. Name the ring

    A ringing frequency shows up as a steady dot. Read its note off the spoke.

  2. Set the house A

    Pick the reference pitch: 440, 442 or 432.

  3. Put it on a screen at the desk

    Mirror it to a monitor and keep an eye on the room while you mix.

What the app brings for you.

Studio, venue or broadcast? Write to hello@tonotopia.com and tell us how you work.

Everything the app does, Free and Premium
BacklineEngineers and audio pros
Tuner with presetsChromatic, with instrument presets.
Reference pitch440, 442 or 432.
DroneA steady reference tone.
Screen mirroringTo whatever screen is at the desk.
Instant replayFreeOne tap plays back the last 5 seconds. Sound too, if you turn it on.

Get on the list.

Opening night is in November. Leave your email and we'll tell you the day it opens.

Admit one

Show
Tonotopia, opening night
Where
iPhone and Android
When
November 2026
Seat
FOH

We'll email you the day the app opens, plus the odd bit of news. Unsubscribe anytime.

Point your phone's camera here to open this page on it.

Keep this stub. You won't need it, but it's a nice stub.