Choose audio
Use the automatically loaded example or select a compatible file from your device.
Use this tool to change audio volume online by applying a precise gain adjustment to an entire audio file. Start with the included example or choose your own recording, raise or lower its level, preview the change and export a new WAV directly in your browser.
Choose a gain value in decibels. Positive values increase sample amplitude, negative values reduce it, and 0 dB leaves the level unchanged.
Digital gain multiplies the amplitude of audio samples by a fixed amount. This tool converts your chosen decibel value into a linear multiplier, applies that multiplier across the decoded recording and creates a new audio buffer for preview and export.
A positive setting makes the samples larger. A negative setting makes them smaller. Because the same gain factor is applied throughout the recording, the internal differences between quieter and louder passages remain proportional unless the increased level reaches the digital limit and clips.
If you want to experiment with several level controls in a mixer-style environment, use the Interactive Online Audio Mixer. The Audio Tools for Recording, Mixing, and Ear Training page also collects other practical browser utilities.
For example, the conversion is calculated from the selected dB value rather than by treating a decibel setting as a simple percentage.
Sometimes an audio file already has the timing, performance and content you want, but its overall level needs a simple adjustment. A gain changer is useful for that narrow task because it lets you specify exactly how much to raise or lower the signal instead of relying on an automatic target.
That is different from the broader work involved in balancing and finishing a production. For a larger view of that process, see Mixing and Mastering and the overview of audio recording, mixing and mastering services.
Use the automatically loaded example or select a compatible file from your device.
Move the dB control or use a preset to choose a precise increase or reduction.
Preview the changed signal, create the processed file and download it as WAV.
A fixed gain adjustment changes the level of the signal as a whole. It does not move notes, change tempo or automatically reshape the dynamics between one moment and another.
Positive gain increases amplitude. Negative gain attenuates it. A setting of 0 dB uses a multiplier of 1, so the sample values remain at their original level. The control ranges from substantial attenuation to a moderate increase so you can make both corrective and clearly audible comparisons.
The tool measures the highest absolute sample peak in the decoded source and estimates what that peak becomes after the selected gain. If the estimate reaches or exceeds 0 dBFS, the display warns that the processed samples can reach the digital ceiling.
That warning matters because simply making a file louder is not the same as creating more usable headroom. The Mixer Console Simulator can help you explore how level controls fit into a broader signal path.
With this gain changer, you decide the amount of change directly: for example −3 dB or +4.5 dB. A normalizer instead measures the source and calculates gain from a target. The two operations can produce similar mathematical gain changes, but the way you choose that change is different.
A fixed gain adjustment uses the same multiplier across the recording. Compression is level-dependent processing that can apply different gain reduction at different moments. If a quiet phrase and a loud phrase differ by a certain amount before a fixed gain change, that relationship remains unless clipping occurs.
For recordings where performance dynamics matter, the instrument recording overview and music genre recording page provide broader recording context.
A vocal, narration or voiceover file may simply need to be turned down or raised for a particular editing step. Gain can do that without changing timing. However, increasing gain also increases breaths, room noise and any other sound already contained in the recording.
For related recording information, see Voiceover Recording Studio, Russian Voice Over and Audio Content Recording Services.
Music can contain sharp transients that sit much higher than most of the waveform. Before applying positive gain, check the source peak and the estimated result peak. A file that already approaches full scale has little room for additional sample amplitude without reaching the limit.
Songwriters and performers can also explore Song Demo Production and the vocal recording timing guide.
The included MP3 is loaded by default so the tool is immediately usable. When you choose your own file, the browser reads it with the File API and decodes it with the Web Audio API. The gain calculation and sample processing happen in browser memory.
The result is encoded locally into a WAV Blob for playback and download. The code on this page does not require a server endpoint to process the selected audio.
Preview Gain creates a temporary processed AudioBuffer for listening. This lets you compare the source with the proposed gain change before creating the downloadable result. The source audio itself is not overwritten.
The WAV export is 16-bit PCM. If positive gain pushes a calculated sample beyond the available digital range, the export stage limits that sample to the representable range. That can produce clipping, so a lower gain setting is preferable when the estimated result peak indicates the signal would exceed full scale.
If you are preparing material for a professional session, the First Time Recording Studio Guide covers practical preparation, while Recording Studio Travel discusses planning a focused recording day.
This tool is useful when the task is simply to apply a known gain change to an audio file. It does not attempt to replace arrangement, mixing, restoration or mastering decisions. That narrow scope makes it easy to hear exactly what a fixed dB adjustment does to the file you selected.
Explore additional browser tools and recording resources when your next step goes beyond a fixed gain adjustment.
Explore more focused browser utilities for audio files, recording, sound and music production.
Explore 168 free browser-based tools for musicians, singers, producers, engineers and creators. Open a category to find your next tool.