RebassLab
v1.7.7 · Windows · Android · Web

Bass processing, tuned to the box.

RebassLab is a modular audio studio for car-bass and subwoofer work: a subharmonic rebass engine, parametric EQ, real-microphone RTA, loudness metering and offline export — one shared Web Audio engine across Windows, Android and the web.

Coming Soon to Google Play & Steam

The full RebassLab app is heading to Google Play and Steam. In the meantime, try the free web demo.

Free web demoTry RebassLab nowComing SoonGoogle PlayComing SoonSteam
WindowsDesktop
AndroidMobile
WebBrowser
▸ 12 studio panels▸ 12 car-audio presets▸ WAV · MP3 · FLAC export
RebassLabtrack.mp3
AB
BYPMTCH
▾

Rebass Engine

SUB?⋮
sub
CROSSOVER
100 Hz
TARGET
32 Hz
BLEND
50%
▾

Source

WAV?⋮
drop_the_bass.wav
44.1k · stereo · 3:42
▾

Waveform

LIVE?⋮
▾

RTA Analyzer

MIC?⋮
▾

Parametric EQ

10-BAND?⋮
▾

Meters

LUFS?⋮
PROC
ORIG
LUFS
-9.2
TP
-0.8
GR
-2.1
RMS
-6.4
▾

Presets

12?⋮
30 Hz Competitionon
32 Hz Daily
Ported Box
SPL Demo
01:24 / 03:42
«
»
● live
Twelve panels · one engine

Everything in the studio

Every panel binds to the same shared Web Audio engine and play state. What you hear is exactly what you export.

Source & Generation

3 panels

Source

Import your track, see the truth.

  • Import WAV / MP3 / FLAC audio files
  • Full metadata: title, artist, codec, sample rate, bitrate, channels
  • Instant playback through the shared engine

Track Trimmer

Non-destructive cut before you process.

  • Waveform preview with selection handles
  • Non-destructive — original audio is never modified
  • Trim the boring intro, keep the drop

Tone & Noise Generator

Test tones & pink noise for tuning.

  • Sine / square / triangle / saw test tones
  • 20–90 Hz presets for box tuning
  • Real-time white & pink noise (procedural, no files)
  • HP/LP filtering, anti-pop ramping, safe defaults

Processing

3 panels

Rebass Engine

The signature subharmonic processor.

  • Four sub modes: octave-down, retune, shift, fixed
  • Crossover 12–48 dB/oct with target boost (20–60 Hz)
  • Punch, sustain, saturation & harmonics shaping
  • Phase + polarity control, audition / solo filter

Parametric EQ

Up to 31 real biquad bands.

  • 10 / 16 / 31-band presets + custom 1–31 bands
  • Per-band freq (log) / gain ±12 dB / Q / type
  • Live synthesized response curve
  • Preset save/load, full reset

Car Audio Presets

Twelve tunings, from daily to SPL.

  • Deep 25, 28 Low, 30 Competition, 32 Daily, 35 Punchy
  • 40 Aggressive, 45 Upper Bass, SPL Demo
  • Sealed Box, Ported Box (tuned to your Hz)
  • Flat / Original reference + Daily Listening

Analysis

3 panels

Waveform Display

See every transient, every peak.

  • Live waveform render with playhead
  • Original signal in cyan, processed overlay
  • Re-scales correctly on panel resize

Spectrum Analyzer

Real-time FFT of the processed signal.

  • High-resolution FFT, smoothed for the eye
  • Taps the processed bus after the limiter
  • Watch your rebass land exactly where you tuned it

RTA Analyzer

Real microphone, real room, real bass.

  • 10 / 16 / 31-band log-spaced, ~20 Hz–20 kHz
  • Real FFT with windowing + peak hold
  • Mic device selection, calibration-file support
  • Clip indicator, pause/resume, dB range control

Metering & Output

3 panels

Master & Meters

LUFS, true-peak, gain reduction — all live.

  • Peak / RMS / true-peak / LUFS metering
  • Output limiter with adjustable ceiling
  • AGC makeup gain for automatic level matching
  • Gain-reduction readout in real time

Export

What you hear is what you get.

  • Offline render to WAV, MP3 (lamejs), and FLAC
  • Same chain as real-time preview — no surprises
  • ZIP packaging for multi-file delivery

Batch Rebass

Process a whole folder in one run.

  • Queue multiple files with one preset
  • Batch offline render + ZIP export
  • Same DSP path as the single-track studio
The signature processor

The Rebass Engine

Detect the bass, synthesize a sub, retune it to your box, and protect everything below it. Four subharmonic modes, a steep crossover, target boost, and the dynamics shaping that makes a 30 Hz note hit like a 30 Hz note should.

Octave

Synthesize a clean one-octave-down sub from the detected bass.

Retune

Shift the bass line to center on your exact target frequency.

Shift

Move bass content by a fixed Hz offset for box-matching.

Fixed

Generate a steady sub at a fixed frequency keyed to the track.

Ported-box safe. The Ported Box preset centers the sub on your tuning frequency and engages the infrasonic filter below it — so you don't unload the cone below tuning.

Signal flow

export = preview
Source
feed
→
Crossover
12–48 dB/oct
→
Sub Synth
octave · retune · shift
→
Target EQ
20–60 Hz boost
→
Dynamics
punch · sat · harmonics
→
Parametric EQ
up to 31 bands
→
Limiter + AGC
ceiling · makeup
→
Master
out → export
A/B tapOriginal signal is tapped pre-chain with loudness-matched gain, so Bypass and Match compare fairly.
Crossover
12–48 dB/oct
Target
20–60 Hz
Sub attack
8 ms
Infrasonic
16 Hz HP
Twelve factory tunings

Car-audio presets

From a transparent daily 32 Hz lift to a full-tilt 30 Hz competition build. Each preset sets the sub mode, target, crossover, infrasonic protection and dynamics for that use — pick one and you're already 90% there.

Daily
Competition
Reference

Deep 25 Hz Rebass

Daily
25Hz

Bass line retuned to center on 25 Hz.

28 Hz Low Bass

Daily
28Hz

Retuned sub centered at 28 Hz.

30 Hz Competition

Competition
30Hz

Heavy 30 Hz sub, steep crossover, punch.

32 Hz Daily Driver

Daily
32Hz

Octave-down sub, musical 32 Hz lift.

35 Hz Punchy

Daily
35Hz

Tight transients + 35 Hz focus.

40 Hz Aggressive

Competition
40Hz

Saturated 40 Hz slam.

45 Hz Upper Bass

Daily
45Hz

Upper-bass attack for small subs.

SPL Demo

Competition
30Hz

Maximum 30 Hz output, saturation + limiter.

Daily Listening

Reference
34Hz

Subtle octave sub, transparent.

Flat / Original

Reference
— no proc —

No processing — reference.

Sealed Box

Daily
35Hz

Tight sealed-box response, gentle sub.

Ported Box (tuned)

Daily
35Hz

Sub centered on your box tuning, infrasonic protection below it.

One engine · three runtimes

Built for every screen

The same Next.js + Web Audio app drives a Windows desktop studio, a native Android build, and a browser PWA — identical DSP, identical identity.

Windows Desktop

The full modular studio.

  • Electron shell with NSIS installer
  • DAW-style drag-and-drop docking workspace
  • Three-column layout, floating windows, 6 layout presets
  • Min window 1024×680, offline-safe bundled fonts
RebassLab-Setup-1.7.7.exe

Android

Touch-friendly tabbed studio.

  • Capacitor 8 native build (com.basslab.studio)
  • 9-tab + customizable Custom tab navigation
  • Touch-safe sliders, safe-area handling
  • Real microphone RTA with mic permission
APK · versionCode 10707

Web

Open a browser, start tuning.

  • Same engine, same panels, same identity
  • PWA: manifest, network-first service worker
  • Theme color #0B0F17
  • No install required to try it out
PWA-ready
DAW-grade workspace

A studio that fits how you work

Drag, dock, float, save layouts, compare A/B, and never lose the manual — it's built into every panel.

Drag-and-drop docking

Tear any panel off into a floating, resizable window, or drop it back over a column to re-dock. Cyan guides show exactly where it lands.

01

Six layout presets

Standard, Bass Processing, EQ Studio, Audio Analysis, Mastering and Compact — plus your own saved named layouts, restored on startup.

02

A/B monitoring

Compare processed vs. original with one click. Bypass for instant reference, Match for loudness-matched comparison.

03

Per-panel help

Every panel has a “?” button that opens a control-by-control reference and a numbered how-to walkthrough. The manual is built in.

04

Undo / redo & shortcuts

Full undo history across the studio plus keyboard shortcuts for the common moves — no momentum lost mid-tune.

05

Nine themes + custom

Settings → Appearance offers nine official presets and per-token custom colors. The dark navy + cyan/purple identity is the default.

06

Questions, answered

Frequently asked questions

Everything you need to know before you drop your first track into the studio.

What is RebassLab?

RebassLab is a modular bass-processing audio studio. It combines a subharmonic rebass engine, parametric EQ, a real-microphone RTA analyzer, loudness metering and offline export in a single app — built for car audio, subwoofer and box tuning work. The same Web Audio engine runs on Windows, Android and the web.

Is RebassLab free?

Yes — the web demo at rebasslabs.com/demo is completely free and runs right in your browser, no install and no account. The full app is coming soon to Google Play and Steam.

What does the Rebass Engine do?

It generates deep sub-bass from your track. Four modes — octave-down, retune, shift and fixed — with a 12–48 dB/oct crossover and a target boost between 20 and 60 Hz, plus punch, sustain, saturation and harmonics shaping. Set the target frequency and the engine detects the optimal settings for your track.

Do my audio files get uploaded to a server?

No. All processing happens on your device using the Web Audio engine — your files never leave your machine, and the studio keeps working offline.

Which platforms does it support?

Windows, Android and any modern web browser. One shared engine means your sound, presets and workflow stay identical on every screen.

What audio formats can I import and export?

Import WAV, MP3 and FLAC files. Export your processed track in WAV, MP3 or FLAC, with loudness and true-peak metering to keep levels honest.

v1.7.7 · com.basslab.studio

Try the free demo.

RebassLab is coming soon to Google Play and Steam. In the meantime, run the full studio right here in your browser — the rebass engine, parametric EQ, meters, presets and tone generator are all live to try.

Free web demoTry RebassLab nowComing SoonGoogle PlayComing SoonSteam
• Runs in the browser• No install, no account• Audio stays on your device