Bounce Check · 3 free checks · in your browser

What's holding your track back?

Drop a bounce. In about ten seconds you get its loudness, dynamics, peak, low end and mono, measured against the subgenre you actually make, and the name of the step that fixes the worst of it.

Bounce Check19 subgenres · mix or master
What is this file?
Drop your bounce here
or click to choose · WAV, MP3, FLAC, AIFF
Measured inside this tab. The audio never leaves your machine.
  • Nothing is uploaded: no server ever hears your track
  • 3 checks free with a free account, no card
  • A mix and a master are judged by different numbers
19subgenres
6readings per file
646steps in the packs
0bytes uploaded
Your report

Spectral balance vs subgenre

Targets are typical ranges for the subgenre, not rules. A record that breaks them on purpose is still a record: the numbers tell you whether you broke them on purpose.

What you get back

A verdict, not a spectrum to squint at.

Most meters hand you numbers and leave the reading to you. Bounce Check reads them: what is off, by how much, and which step of your subgenre's checklist fixes it.

Example · Trap master

2 things are holding this back.

Almost no dynamic range left. This is the sound of a limiter working too hard: the drums stop hitting. Start with this one — it is the one that will be heard first.

Loudness
-8.7 LUFS
Target: -8 … -5
Quieter than the subgenre sits. On a playlist it will feel small.
Dynamics
5.3 dB
Target: 6 … 10 (PLR)
The limiter ate the transients.
Peak
-3.4 dB
Target: < -0.3 dB
Peak level is safe.
Mono compatibility
+0.42
Target: > +0.20
Holds up in mono.

Spectral balance vs subgenre

Sub+9.8
Bass+7.1
Low mids+2.3
Mids+0.0
High mids-4.6
Air-11.2
Low-end weight+8.7
How it works

Three steps, about ten seconds.

No plugin to install, no upload bar, no waiting for an email. Your browser already has an audio engine; Bounce Check just asks it the right questions.

01

Drop a bounce

A WAV, MP3, FLAC or AIFF of your mix or your master. It is decoded and measured right here, in this tab.

02

Measured against your subgenre

A techno master and a hip hop mix are not judged by the same numbers. Each of the 19 subgenres carries its own loudness, dynamics and low-end ranges.

03

The step that fixes it

The worst problem points at a real step in your subgenre's pack: a mono problem lands on the phone and car check, a crushed master on mix bus glue.

What it reads

Six readings. The ones that decide how a record sounds next to other records.

Loudness

LUFS

Integrated loudness to ITU-R BS.1770: K-weighted, with both gates. The number streaming platforms turn your track up or down to.

Dynamics

PLR

Peak to loudness ratio: how much punch survived the limiter. Under your subgenre's range, the drums have stopped hitting.

Peak

dBFS

Checked against the right ceiling for the file: -3 dB for a mix that still has to be mastered, -0.3 dB for a master.

Mono compatibility

L/R

Left/right correlation, and how much of the low end sits in the sides below 120 Hz. Phones, clubs and Bluetooth speakers are mono down there.

Spectral balance

6 BANDS

Sub to air, each band in dB against the 400 Hz – 2 kHz body of the track, so the shape compares across files at any level.

Low-end weight

SUB+BASS

How far the sub and bass sit above the body, against the range your subgenre carries. Thin or muddy, it says which.

Private by construction

Your stems stay yours.

Producers do not send unreleased music to strangers, and they are right not to. So Bounce Check does not ask you to: there is no upload step, because the whole analysis runs in the browser you are reading this in.

  1. 01Your browser decodes the file with its own audio engine
  2. 02Loudness, peak and spectrum are measured in memory
  3. 03Close the tab and it is gone. Nothing was sent anywhere
Subgenres

Nineteen subgenres, nineteen sets of targets.

Pick yours and check a bounce against it. Each one also has its own pack of 34 steps in the app, written in the order that subgenre is actually built.

Urban

Electronic

The Engineer's Workpad

Bounce Check names the problem. The workpad walks you to done.

Every subgenre has a pack of 34 steps across songwriting, production, mix and mastering: 646 in all. Check them off and the track gets a number you can trust, so being finished is a fact, not a feeling.

  • The step Bounce Check names is the same step you open in the app
  • Every track you are working on, each with its own progress
  • Reference EQ and pan targets for every instrument
Savage
TRAP · 140 BPM · F MINOR
Songwriting100%
6 of 6 steps
Production100%
10 of 10 steps
Mix70%
7 of 10 steps · next: depth, delay & reverb
Mastering0%
Not started
Track complete 68%
The method

Four stages. Every step accounted for.

Most advice about mixing is vague. The workpad is a sequence: each stage has defined steps, and checking them off moves a real number.

01 6 steps

Songwriting

Structure, harmony, hook, rhythmic signature, lyrics, demo. The song has to exist before you produce it.

02 10 steps

Production

Beat structure, arrangement, sound design. Get the idea finished before you polish it.

03 10 steps

Mix

EQ, compression, routing, space. Balance decisions in an order that doesn't send you backwards.

04 8 steps

Mastering

Limiting, LUFS, final export. The last mile, with a checklist instead of a guess.

Inside the app

Built for finishing, not for browsing.

Projects

Genre, BPM, key, artwork. Every track you're working on in one place, each with its own progress.

AI notes and suggestions

Stuck on a step? Get a specific suggestion for that step on that track, not a generic article.

Reference-grade charts

EQ and pan targets for every instrument. See where each one sits in frequency and stereo space instead of guessing.

Progress log

A record of what you changed and when, so you stop relitigating decisions you already made.

English and Spanish

The whole app, in both. Switch any time.

On your phone, no app store

Open it in Safari or Chrome, tap Share, then Add to Home Screen. It opens full screen like any other app.

Pricing

Start free. Upgrade when it's carrying your work.

3 Bounce Checks free. Unlimited with any paid plan. The free checks need a free account, no card. Every paid plan below includes unlimited Bounce Check.
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FAQ

Questions

Is my audio uploaded anywhere?

No. The file is decoded and measured by your browser, inside this tab. It never leaves your machine, and closing the tab is the end of it.

Is Bounce Check free?

Your first 3 checks are, with a free account and no card. After that, unlimited checks come with every paid plan, from $4.99 once. Paid plans open soon; until then the waitlist locks the founder price.

How accurate are the numbers?

Loudness follows ITU-R BS.1770, the standard streaming platforms use, and the measurements are checked against test signals. The targets are typical ranges for each subgenre, not rules: a record that breaks them on purpose is still a record.

Should I check the mix or the master?

Either, and tell it which. A mix is judged on headroom and dynamics it should leave for mastering; a master is judged on where your subgenre sits on a playlist.

Does the workpad replace my DAW?

No. It sits next to it. You work in your DAW; the workpad tells you what step you're on and how far the track actually is.

Who is it for?

Solo producers and mix or mastering engineers working without a team: anyone who has to be their own second opinion.

Drop the bounce you're stuck on.

Ten seconds, nothing uploaded, and you will know which step to open next.