Free Tools

Work out what your room is doing to your voice

Seven tools, no signup, nothing uploaded. They are listed in the order they are worth using: hear the difference a room makes, measure the one you record in, then find out what closing the gap costs.

Hear it

Start here. A number in seconds means nothing until you have heard the difference it describes.

Hear the Difference

What your room is doing to your voice

Play the same sound in an untreated room and a treated one, back to back. This is the fastest way to understand what everyone means by a reverberation time — no microphone permission, no signup, one click.

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Measure it

Find out what your own room is doing to your voice, before you buy anything.

Studio Sound Check

Read four sentences, get your number

Measures your room's reverberation from ordinary speech — no test tone, no measurement mic, no calibration. Tells you whether your recordings sound rough because of the room, your noise floor or your levels, which is the thing people misdiagnose as a microphone problem.

Open →uses your mic

Noise Level Meter

What the room sounds like when you stop talking

A real-time decibel meter with min, max and average tracking. Use it to catch the fridge, the HVAC and the computer fan that sit under every take — the problems no amount of acoustic treatment will fix.

Open →uses your mic

Price the fix

Turn the gap between your number and your target into a shopping list.

Acoustic Panel Calculator

How many panels reach 0.3 seconds

Sizes treatment for your room and your target — then shows what fewer panels would get you, because almost nobody buys all the way to a target. Also reveals which products cannot reach it at all, thin foam included.

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Rug Size Calculator

The cheapest large surface you can treat

A bare floor is usually the single biggest reflector in a recording space. Works out what size rug your room takes, how much reverberation each size removes, and what the pad underneath is worth.

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Room Acoustics Calculator

Predict a room before you move into it

Estimates reverberation across six frequency bands from your dimensions and surfaces, and finds the room modes that make a small space boom. Useful for deciding which spare room to record in, or what a room will need before you set it up.

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Look it up

The measured figures behind every recommendation on this site.

Absorption Coefficients

90 materials, measured

How much carpet, curtains, glass, panels, plaster, foam and wood actually absorb, across six octave bands, with NRC. Searchable, and the source every calculator here cites — so you can check any recommendation we make.

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Not sure where to start?

  1. Hear it first. Hear the difference plays the same sound in an untreated room and a treated one. Thirty seconds, and every number after this one means something.
  2. Measure your own room. The sound check reads your reverberation time from ten seconds of ordinary speech, and separates the room from your noise floor and your levels.
  3. Price the fix. The panel calculator and rug calculator turn the gap between your number and 0.3 seconds into a shopping list — including what a smaller budget buys instead.

None of this is soundproofing. If your problem is sound getting into the room — traffic, a neighbour, a flatmate — the noise meter will confirm it, and then honestly, these tools are not the answer.