What should go in the edit record?

Record the source identity, browser/device, chosen percentage, result summary, clipped samples, full-preview observations and the saved WAV checks. Mark anything not checked instead of inventing a value.

Does 200% mean a 200-decibel increase?

No. It multiplies sample amplitude by two before clipping. The control is linear gain, not a decibel or LUFS target.

What if clipped samples is zero?

It means this gain operation did not push the processed samples beyond full scale. It does not prove ideal perceived loudness, absence of pre-existing distortion or compliance with a delivery standard. Listen and measure separately where required.

What does the WAV retain?

It contains the adjusted decoded audio as PCM16 at the decoded sample rate and channel count. It is not the original compressed file, and source tags, artwork, chapters and cue markers are not copied.

Is the audio uploaded?

No. Decoding, gain, WAV encoding and preview happen in the current browser tab. Save the accepted result before changing the input/settings or leaving the page.

Volume Changer: A Record You Can Copy and Fill In

For a repeatable volume edit, keep one record of the source, the gain you chose, the reported clipping, what you heard, and the saved output. Use Volume Changer for the edit and fill in the record below with your own observations. The tool changes sample amplitude locally and exports a new PCM16 WAV; it does not measure loudness targets or certify a recording for delivery.

Copy this blank record

Copy the list into a project note and fill it in after the relevant check. It is a blank template, not the result of an audio test. Leave unperformed checks marked as not checked.

Purpose of the edit:
Source filename, format, file size and saved original location:
Browser/device used:
Selected output volume percentage and reason:
Result summary: duration, channel count and sample rate:
Reported peak after clipping and clipped-sample count:
Complete preview listened to: yes/no; distortion or other observations:
Saved WAV filename and location:
Downloaded WAV duration/channels checked: yes/no; differences:

Make the edit and fill the record

Keep the original and select a supported, browser-decodable audio file. A filename appearing confirms selection, not successful decoding.
Set Output volume from 0% through 400% and write down the exact percentage. Start from the intended adjustment rather than choosing the maximum by default.
Select Change volume. If it succeeds, record the duration, channels, sample rate, peak and clipped-sample count shown beneath the audio preview.
Listen to the complete result. If clipping is reported or distortion is audible, reduce the percentage, run the operation again and replace the record with the accepted run's values.
Download WAV and open the saved file. Verify its duration and channels and note the result before replacing production audio. Store the record with the source and accepted export.

Changing the selected file or percentage invalidates the previous result and temporary download. Save the accepted WAV before changing settings or leaving the tab. If processing fails, record the error rather than marking the preview or export checks as complete.

Check the limits before processing

Stage	Limit or behavior
Input	A non-empty browser-decodable audio file no larger than 50 MiB.
Decoded duration	At most five minutes.
Decoded channels and samples	One through eight channels; at most 30 million samples across all channels.
Gain	0% through 400%, applied as a linear amplitude multiplier.
WAV encoding	PCM16 at the decoded sample rate, which must be 8,000–192,000 Hz; decoded channel count is retained.

MP3, WAV, M4A, AAC, Ogg, WebM and FLAC can be selected, but actual decoding depends on the browser, operating system and codec. A compressed file below 50 MiB can still exceed a decoded limit. The sample rate reported is the decoded rate, which is not a promise to preserve the original file's encoded rate.

Read clipping as a warning, not a loudness score

The percentage multiplies decoded sample amplitude: 100% uses a multiplier of one and 200% uses two. Values beyond digital full scale are limited to -1 or +1, and the tool counts those crossings. The reported peak is measured after that clipping step.

For a small arithmetic example, decoded samples 0.25, 0.75 and -0.75 at 200% become 0.5, 1 and -1, with two clipped samples and a post-clipping peak of 1. This is a calculation on three sample values, not a listening test or a loudness measurement of a recording. A zero clipped-sample count does not establish a suitable LUFS level or freedom from distortion already in the source.

Keep the export's scope in the handoff

The output filename ends in -volume-adjusted.wav. The tool writes a new PCM16 WAV rather than retaining the original compression format. It does not copy source tags, artwork, chapters, cue markers or other source-file metadata into that WAV.

Keep the original and verify the saved copy. Lowering gain cannot restore information already clipped in the original recording. This operation is not normalization, limiting, noise removal, mastering or broadcast-compliance measurement; a delivery requirement for those tasks needs a suitable separate workflow.