Compare Volume Changer approaches by choosing a direct linear gain from 0% through 400% that matches the result: 0% mutes the decoded audio, 100% keeps its decoded sample amplitude, and values above 100% boost it while making clipping checks essential. A device playback control can make an immediate listening adjustment, but it does not create a separately leveled audio file; Volume Changer changes decoded samples and exports the complete result. For a quieter portable copy, compare settings below 100%. For a file that matches the decoder's existing sample level, use 100% as the reference. For a louder copy, compare settings above 100% and listen for distortion. The Volume Changer performs these operations in the current browser tab: the source is not uploaded, queued, analyzed by an external service, or retained by Lizely. It accepts browser-decodable MP3, WAV, M4A, AAC, Ogg, WebM, and FLAC input, then exports 16-bit PCM WAV. It is a linear gain editor, not a loudness normalizer, compressor, limiter, mastering processor, or broadcast-compliance tool. That distinction gives you a fair comparison: choose the smallest change that achieves the goal, inspect peak and clipped samples, preview the entire result, and keep the original.
What the volume-changing choices mean
The useful comparison is not which percentage sounds biggest. It is whether the deliverable is a temporary monitoring adjustment, a quieter file, a file at the decoder's existing level, a louder file, or silence. These are different outcomes, and a method that suits one does not automatically suit another.
| Approach | What it changes | Best fit | Main limitation |
|---|---|---|---|
| Playback-only adjustment | The level heard through the current device or player | Temporary monitoring | Does not create a separately adjusted file |
| Volume Changer below 100% | Decoded sample amplitude in a new WAV | A quieter portable copy | Does not calculate a target loudness |
| Volume Changer at 100% | Multiplies decoded samples by one | A neutral amplitude reference | The export still converts the audio to PCM16 |
| Volume Changer above 100%, up to 400% | Decoded sample amplitude in a new WAV | A louder copy when the source has suitable headroom | Samples beyond digital full scale are clipped |
| Volume Changer at 0% | Writes silence while preserving decoded duration, sample rate, and channel count | A muted exported file | Contains no audible signal |
| Normalization, compression, or limiting | Targets loudness or dynamics rather than applying one direct multiplier | Professional measured delivery workflows | Not performed by Volume Changer |
A system or player volume control is enough when the only goal is to change what you hear during the current session. Volume Changer is the relevant choice when the adjusted level must be carried in a new file. For an exported edit, judge the method by the complete listening result, clipping report, and delivery requirement rather than by the percentage alone.
Set the gain and export the WAV
- Choose the source file. Select a browser-decodable MP3, WAV, M4A, AAC, Ogg, WebM, or FLAC file no larger than 50 MiB. Wait for the filename to appear before continuing. A familiar filename extension is not proof that the browser can decode the media.
- Check the decoded workload. The complete source must decode to no more than five minutes, eight channels, and 30 million total channel samples. Compressed audio can expand substantially during decoding, so all three decoded limits matter even when the input file is below 50 MiB.
- Set the linear output volume. Choose a value from 0% through 400%, then select Change volume. A setting below 100% scales samples down, 100% keeps their decoded amplitude, and a setting above 100% scales them up. Changing the file or percentage invalidates the previous result.
- Preview and inspect the complete WAV. Listen from the beginning through the final sample. Review both the reported peak and clipped-sample count before accepting the louder or quieter setting.
- Download only after the full preview sounds correct. The complete result is exported as a 16-bit PCM WAV with a filename ending in -volume-adjusted.wav. Verify its duration and channel count before replacing a production file, and download it before the tab closes or a newer operation replaces it.
Read the clipping report before accepting a louder setting
Each finite decoded sample is multiplied by the selected gain. If a multiplied sample goes above positive digital full scale or below negative digital full scale, the tool clamps it to that boundary. The clipped-sample count records how many samples crossed the boundary, while the peak shown in the result is measured after clipping.
A nonzero clipped-sample count is evidence that the gain may have introduced audible distortion. A zero count does not guarantee ideal perceived loudness, because the source may still have an unsuitable frequency balance, dynamics, or monitoring level. Begin near 100%, preview the complete output through suitable headphones or speakers, and reduce the percentage if distortion appears.
Clipping cannot repair information that was already clipped in the source. Volume Changer can reduce the risk of adding more clipping, but it cannot reconstruct lost waveform detail. This is why repeated comparisons should begin with an unchanged original rather than another converted copy.
Separate linear gain from loudness control
The selected percentage is a direct sample-amplitude multiplier. In formula form, output sample amplitude = decoded sample amplitude × linear gain. At 200%, for example, linear amplitude doubles, which is approximately a 6.02 dB amplitude increase before clipping—not an increase of 200 decibels.
This control does not make every sound subjectively louder by the same amount. Perceived loudness depends on frequency balance, duration, dynamics, speakers, and listening conditions. Volume Changer does not perform normalization, mastering, limiting, compression, noise reduction, or broadcast compliance. It also does not calculate LUFS, true peak, replay gain, or platform-specific targets. Professional delivery therefore calls for a measured audio workflow and monitoring of the exported file.
Check browser compatibility and output limits
The browser's Web Audio decoder first converts the complete encoded file into floating-point channel samples. Compatibility therefore depends on the browser, operating system, and codec build. The format name in a filename does not guarantee successful decoding. The W3C Web Audio API decodeAudioData documentation describes the browser decoding interface involved. If decoding fails, Volume Changer stops and shows an error instead of creating an empty or partial output.
| Factor | Exact behavior | Planning consideration |
|---|---|---|
| Input | Browser-decodable MP3, WAV, M4A, AAC, Ogg, WebM, or FLAC; maximum input size of 50 MiB | A smaller compressed file can still exceed a decoded limit after expansion |
| Decoded limits | Maximum five-minute duration, eight channels, and 30 million total decoded channel samples | The complete file must satisfy every decoded limit |
| Processing location | Decoding, gain, preview, and encoding occur in the current browser tab | The source is not uploaded, queued, externally analyzed, or retained by Lizely |
| WAV output | RIFF WAVE, little-endian integer fields, format code 1, original decoded sample rate, original channel count, 16 bits per sample, and frame-by-frame interleaving | Negative full scale maps to -32768 and positive full scale maps to +32767 |
| Metadata | Does not preserve source tags, album art, chapters, loop points, cue markers, encoder metadata, or original compression settings | Keep the source when those elements or the original encode matter |
| Temporary result | The generated download disappears when the tab closes or a new operation replaces it | Save the completed WAV promptly and keep the original for version control |
The output uses the RIFF and PCM fields documented in Microsoft's WAVEFORMATEX reference. WAV is always used, even when the source is compressed. PCM16 can be produced without adding another lossy codec and provides a complete, inspectable result, but the file is usually much larger than MP3, AAC, or Ogg.
Use a repeatable comparison checklist
- Define the deliverable: Decide whether you need a temporary playback adjustment or a separately exported audio file.
- Protect the source: Keep the original because Volume Changer cannot restore clipped source information or omitted metadata.
- Use 100% as a reference: Compare a nearby lower or higher percentage instead of assuming the maximum setting is appropriate.
- Evaluate two signals together: Listen to the entire output and inspect both the peak and clipped-sample count.
- Confirm the structure: Verify the downloaded duration and channel count before using the WAV as a production replacement.
- Save while available: Download the approved result before closing the tab or starting another operation that replaces it.
This process separates temporary level control, direct sample gain, and measured loudness work. Volume Changer is best suited to the middle task: multiplying decoded amplitude from 0% through 400%, revealing clipping, and exporting the complete PCM16 WAV for a controlled listening check.
If you're weighing options, What Should I Compare Before Using an Audio Equalizer? covers this in detail.
If you're weighing options, How to Troubleshoot an Audio Pitch Changer Problem covers this in detail.