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Hear gain changes on a human voice
A 12-second human narration excerpt, deliberately reduced to 35% amplitude to make a quiet input. Keep your device volume low and unchanged while comparing. Playback starts only when you press play.
| File | Peak (dBFS) | RMS (dBFS) | Full-scale samples |
|---|---|---|---|
| Quiet source | -15.44 | -31.42 | 0 |
| Speech · 125% | -13.57 | -29.48 | 0 |
| Speech · 200% | -9.39 | -25.4 | 0 |
125% adds about 1.94 dB; 200% adds about 6.02 dB before encoding. This example stays below full scale. Louder source recordings can clip: gain does not remove noise, repair distortion or normalize loudness.
Download input · Download output
Download input · Download output
Source: Alice’s Adventures in Wonderland, Chapter 1 — Lewis Carroll; read by Kristen McQuillin for LibriVox. Public-domain recording released by LibriVox. Excerpt 00:35–00:47, decoded to mono 48 kHz WAV, amplitude multiplied by 0.35 to prepare a quiet example. Outputs exported as MP3 at 125% and 200%.
Processed with the same Mediaivo tool code. Measurements, settings and SHA-256 hashes · Credits and reuse terms. One short nature clip and one prepared speech excerpt. These results do not represent every phone, speaker, codec, recording or scene. No claim of lossless compression, noise removal, loudness normalization or endorsement by the source creators.
Compare 100%, 125% and 75% on the same audio
Start at a low device volume. This four-second synthetic reference tone is not speech or music. Keep your speaker or headphone setting unchanged while comparing the files; nothing plays automatically.
| File | Sample peak (dBFS) | RMS (dBFS) | Samples at or above full scale |
|---|---|---|---|
| Source WAV · 100% | -9.12 | -16.11 | 0 |
| Output MP3 · 125% | -7.18 | -14.17 | 0 |
| Output MP3 · 75% | -11.57 | -18.61 | 0 |
Download input · Download 125% amplitude output
Download input · Download 75% amplitude output
Gain is not loudness normalization
125% multiplies amplitude by 1.25 (about +1.94 dB); 75% applies 0.75 (about −2.50 dB). MP3 encoding can slightly change peaks. These references stay below full scale, but that does not prove every recording is distortion-free. The tool applies gain and exports MP3; it does not target a LUFS loudness, remove noise or repair clipping already in the source.
For an input peaking at −1 dBFS, adding +1.94 dB can push peaks above full scale. Listen to your loudest phrase before keeping an increase. Use Trim Audio for unwanted sections and Convert Audio when your main goal is a different format.
Measured with the actual Mediaivo processor. Settings, file hashes and encoder version · Test pack and method. Results can vary with the source and encoder version.
How to Increase or Reduce Audio Volume Without Clipping
Make a quiet recording easier to hear, understand what each percentage changes, and avoid turning a volume problem into distortion.
How to use Change Audio Volume
- Listen to the loudest passage first. The downloadable reference is a synthetic tone; begin at low device volume.
- Choose 125% for a modest gain increase or 75% to reduce amplitude. This applies gain, not noise removal or LUFS normalization.
- Process and compare the MP3 at unchanged device volume. Check peaks and noise; lowering a clipped source does not restore its waveform.
About this tool
Increase or reduce an audio file’s volume. Mediaivo keeps the workflow deliberately focused so you can finish one task without learning a full editing suite.
Need more context? Read How to Increase or Reduce Audio Volume Without Clipping for practical settings, checks and trade-offs.