FREE ACOUSTIC SIMULATOR

Your room changes everything.

So design around it.

Bass piling up in one seat, reflections smearing the rest; your room is doing this to any speaker you place in it. Decide where your speakers, seat, and panels should go with the physics in mind.

A listening room solved in roomtreatment.diy: speakers, seat and treatment panels placed against the room's modelled sound field.
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The problem

A room is an instrument. Most are out of tune.

Every room colours the sound that passes through it. The usual fix, foam in the corners and a panel kit sized by the square foot, treats a room that isn't yours. Yours is specific: its dimensions, its surfaces, and the exact spots your speakers and seat sit. Here is what goes wrong, and what it actually looks like.

frequency response · 20–200 Hz, listening seat

01

Uneven, booming bass

Some notes hit twice as hard as the rest while others go missing entirely. The same bassline booms at one seat and sounds thin at the next.

stereo width · reflection time, listening seat

02

Collapsed soundstage

Instead of a wide image spread across the front wall, everything bunches toward the centre. Late reflections smear the cues your ears use to place each instrument.

stereo focal point · left-right symmetry

03

Off-centre stereo image

The image pulls to one side. A vocal that should sit dead centre drifts left or right, and the two halves of the mix stop carrying equal weight.

Build

Drag-and-drop 3D editor

Draw your room's exact shape, surfaces and openings in the browser.

Solve

State-of-the-art physics

A full sound-field simulation of your space, not a rule of thumb.

Place

Collaborative algorithmic placement

Decide where every panel, speaker and seat should sit and know why.

Measured, not guessed

Your room, before and after.

It builds a model of your exact room, then measures how sound actually behaves inside it. Here is the same room before any treatment, and after the layout it works out for you: the speakers, the seat, every panel.

A room solved in roomtreatment.diy: its modelled sound field shown as a point cloud, with treatment panels, speakers and the listening position placed.

Frequency response

listening position · 20–200 Hz

beforeafter
2030507010015020060708090dB

swing 24 dB → 9 dB

RT60 decay time

reverberation · 20–200 Hz

beforeafter
203050701001502000.00.20.40.60.8sstudio target

decay 0.7 s → 0.3 s

FAQ

Questions from the people using it.

Pulled from the threads where the tool first went out. If something is still unclear, the room editor itself is the fastest way to find out.

  • You verify an email address, then the tool is free to use. Your rooms are saved to that account so you can come back and keep refining them.

  • A tape measure is enough. You do not need centimetre precision for treatment to be accurate. If your phone has a LiDAR scanner you can scan the space with an app like Polycam, and you can work in metric or imperial throughout.

  • Yes. Sloped and vaulted ceilings, attic rooms with angled roofs, and L-shapes are all supported. You can also place doors and windows on any wall and set their size and position.

  • It models the sound field for your exact room and system, then tracks where each frequency band lands on the walls. Panels go where they have the highest measured impact based on frequency response and sound decay times across the entire frequency spectrum.

  • Yes, and it goes further. It can also optimize speaker and listening positions first, searching well over a hundred thousand placement and aiming combinations for the flattest response and the tightest stereo imaging. You can also choose which combination of components to optimize: subwoofer(s), speakers, or listener position.

  • Yes. There is a dedicated studio mode alongside the listening-room workflow.

  • Not yet, this is upcoming in a future update.

  • For position searches, anywhere from 2-10 seconds, and for panel placement, up to a minute.

  • The model is built from first principles and acoustics literature, with targets calibrated against measured rooms. It is a prediction rather than a microphone, but it is built to stay as objective as the physics allows.

See what your room is actually doing.

Draw it once. Let the physics work out the speakers, the seat and every panel.