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Audio Volume Booster

Boost quiet audio locally with manual gain, peak normalization or an RMS target, compare waveform and headroom evidence, choose explicit limiter behavior, and export a verified WAV.

Manual gain · peak · RMS targetSoft / hard limiterWaveform + headroom auditOriginal / processed A-B preview16-bit / 32-bit WAV + project
Local gain · normalization · evidence

Audio Gain & Headroom Studio

Make quiet audio louder without uploading it. Choose fixed gain, sample-peak normalization or an arithmetic-RMS target, preview original and processed audio, inspect clipping and limiter evidence, then export a WAV plus a portable settings/audit record.

Local browser decodeManual dB · peak normalize · RMS targetNone · soft · hard limiterWaveform · peak · RMS · crest · headroom16-bit PCM · 32-bit float WAVAudit CSV · Project JSON · local history

1 · Source audio

Input codec support follows your browser. The decoded PCM stays in this tab; project JSON intentionally never embeds audio.

Input sample peak—
Input RMS—
Crest factor—
Sample headroom—

No audio decoded yet.

2 · Gain plan

Load audio to preview the gain plan.

3 · Processed result

Output sample peak—
Output RMS—
Output crest—
Applied gain—
Above ceiling pre-protection—
Above 0 dBFS pre-protection—
Limiter-handled samples—
MethodDecoded PCM

Playback caution: boosted audio can be unexpectedly loud. Start device/headphone volume low and compare at a comfortable level.

4 · Export & handoff

What the meters prove — and what they do not

Peak normalization

Calculates gain from the loudest decoded sample to the chosen sample-peak ceiling. It is deterministic, but it is not inter-sample true-peak normalization.

RMS target

Uses arithmetic RMS across decoded samples. That can help compare energy, but it is not LUFS, perceived loudness, broadcast compliance or mastering certification.

Limiter evidence

The studio counts samples that cross the selected ceiling before protection and reports how many samples the soft/hard limiter handles instead of hiding that intervention.

Export semantics

16-bit PCM clamps to the PCM range during quantization. 32-bit float preserves floating-point sample values, so downstream playback may still clip if you intentionally disable protection.

Truth boundary: processing is local after browser decoding. This tool does not claim LUFS matching, true-peak certification, noise removal, dynamic mastering, hearing-safety certification, restoration of already-clipped audio, or support for every codec. Increasing gain also raises the noise floor. Browser decoding and playback behavior vary by device and codec.
Ready. Choose audio or generate the local test tone; nothing is uploaded by this studio.

Make audio louder with evidence, not a mystery percentage

A decibel gain is converted to a linear sample multiplier, while peak-normalize and RMS-target modes calculate their own gain from the decoded signal. Before and after peak, RMS, crest factor and clipping counts stay visible.

Three useful gain workflows

Use manual gain when you know the adjustment, peak normalization when you want a deterministic sample-peak ceiling, or RMS target when arithmetic signal energy is the comparison you need. RMS is deliberately not labeled LUFS.

Limiter choices stay explicit

Soft ceiling, hard ceiling and no-limiter modes expose how many samples crossed the target before protection. That makes the tradeoff inspectable instead of hiding a limiter behind a generic “enhance” button.

Private local export

The processed result can be previewed beside the original and exported as 16-bit PCM or 32-bit float WAV. Audit CSV and Project JSON hold settings and numeric evidence; they do not embed the source audio.

When another audio tool is better

Use a loudness analyzer for LUFS-style measurement, an equalizer for frequency balance, a compressor for dynamic range, or a clipping detector when diagnosis rather than gain change is the primary task.

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