To make sure you use a volume changer correctly, start near 100%, apply a linear gain from 0% to 400%, and check the full preview and clipping report before download.
The Volume Changer adjusts decoded sample amplitudes in the current browser tab; it neither changes a device's system volume nor performs loudness normalization. A reliable result comes from checking file eligibility, gain, full-length playback, clipping data, and export properties in that order.
Confirm the file is eligible before processing
Choose a browser-decodable MP3, WAV, M4A, AAC, Ogg, WebM, or FLAC file. The browser first converts the complete encoded file into floating-point channel samples, a process described by the Web Audio API decodeAudioData documentation. Format support depends on the browser, operating system, and codec build, so a matching filename extension is not proof that the file can be decoded.
| Check | Accepted condition | Why it matters |
|---|---|---|
| Input format | A browser-decodable MP3, WAV, M4A, AAC, Ogg, WebM, or FLAC | The browser's codecs must be able to decode the complete file. |
| Input file size | No larger than 50 MiB | Larger files fall outside the tool's input limit. |
| Decoded duration | No longer than five minutes | Longer decoded audio is rejected. |
| Decoded channels | No more than eight | Files with more decoded channels are rejected. |
| Total decoded channel samples | No more than 30 million | This limit applies across all decoded channels. |
A compressed file can expand substantially after decoding, so the decoded duration, channel, and sample limits matter even when the selected file is below 50 MiB. If decoding fails, the tool stops and displays an error instead of creating an empty or partial output.
Set the gain, preview, and download in the right order
- Choose the source file. Keep your own original, select a supported browser-decodable file no larger than 50 MiB, and wait for its filename to appear before continuing.
- Set the linear output volume. Choose a value from 0% through 400%. For a cautious first pass, begin near 100% and adjust after listening to the result.
- Apply the change. Select Change volume. The tool decodes the complete file, multiplies each finite sample by the selected gain, and prepares a WAV result.
- Wait for the complete preview. If the browser cannot decode the source, the operation ends with an error and produces no usable output.
- Listen to the entire WAV. Preview through suitable headphones or speakers, checking both quiet passages and the loudest sections instead of judging only the opening.
- Inspect the peak and clipped-sample count. If the count is nonzero or you hear distortion, lower the percentage and run Change volume again.
- Download only an acceptable result. Once the complete preview sounds correct and the clipping report has been reviewed, save the WAV. Its filename ends in -volume-adjusted.wav.
Changing the file or percentage invalidates the previous result and revokes its temporary object URL, so always inspect the newest generated version. A job identifier also prevents an older asynchronous decode from overwriting newer settings.
Read 0% to 400% as linear sample gain
The percentage is a direct multiplier on decoded sample amplitude, not a decibel control. This distinction matters when choosing a setting for a quiet recording or checking a boosted file.
| Setting | Sample operation | Interpretation |
|---|---|---|
| 0% | Multiply by zero | Writes silence while preserving decoded duration, sample rate, and channel count. |
| 50% | Multiply by 0.5 | Halves the amplitude of every decoded sample. |
| 100% | Multiply by 1 | Keeps the decoded amplitude at the gain stage before PCM16 export. |
| 200% | Multiply by 2 | Doubles linear amplitude, an increase of approximately 6.02 dB before clipping. |
| 400% | Multiply by 4 | Uses the highest available gain and requires careful clipping checks. |
For more background on the difference between amplitude and loudness, see Volume Changer Meaning in Audio and How It Works. A higher percentage is not automatically a better setting: it increases the chance that already-loud samples will cross the digital full-scale boundary.
Use peak and clipping data as quality checks
After gain is applied, values above +1 or below -1 are clipped to the supported full-scale range. The clipped-sample count records how many multiplied samples crossed that boundary, while the reported peak is measured after clipping. A nonzero count is evidence that the gain may have introduced audible distortion. A zero count does not guarantee ideal perceived loudness, and it cannot reveal every issue with frequency balance or dynamics.
Use the report as a warning signal rather than a target. Listen to the complete preview, then reduce the percentage if the waveform clips or the output sounds harsh. If the source already contains clipped audio, the operation cannot reconstruct information that was lost before processing.
Keep loudness targets outside this workflow
Linear gain is not loudness normalization, mastering, limiting, compression, noise reduction, or broadcast-compliance processing. Perceived loudness also depends on frequency balance, duration, dynamics, speakers, and listening conditions. The tool does not calculate LUFS, true peak, ReplayGain, or a platform-specific loudness target.
For professional delivery, use a measured audio workflow and monitor the exported file on the intended playback system. If the goal is to meet a streaming, broadcast, or mastering specification, use an appropriate specialist process rather than assuming that a larger gain percentage satisfies that requirement.
Check the exported WAV before using it
A successful result is a complete 16-bit PCM WAV file. It uses a RIFF container, little-endian integer fields, format code 1 for uncompressed PCM, the original decoded sample rate, and the original decoded channel count. Channel samples are interleaved frame by frame, matching the structure described in Microsoft's WAVEFORMATEX reference.
The output is always WAV, even when the source is compressed. It is usually much larger than MP3, AAC, or Ogg. The tool does not preserve source tags, album art, chapters, loop points, cue markers, encoder metadata, or the original compression settings, so treat the WAV as a new production copy rather than a complete metadata-preserving replacement.
Before replacing any working audio, open the downloaded file and verify its duration and channel count. Keeping the source is important because the tool cannot undo clipping, and repeated PCM conversions can complicate version control.
Keep processing local and save the download
Decoding, gain adjustment, WAV encoding, preview, and download all occur in the current browser tab. The source audio is not uploaded, queued, analyzed by an external service, or retained by Lizely. The generated download link is temporary and disappears when the tab closes or a new operation replaces it, so save an accepted copy locally.
A result is ready to use only after the file was eligible, the complete preview sounded acceptable, the peak and clipped-sample count were reviewed, and the downloaded WAV's duration and channels were verified.
For a deeper look, see What Does the 50 MiB Limit Mean in Audio Pitch Changer?.