Trim an audio clip, add a fade, adjust the gain, and export a WAV file. Every edit happens in your browser.
Audio Editor opens one audio file, lets you shorten it, fade it and change its loudness, and writes a new file back to your device. Every step happens inside the browser, and nothing is uploaded.
Your browser decodes the file into raw samples, which the page draws as a waveform. Any format it can decode works, which usually means WAV, MP3, OGG and M4A.
Nothing changes until you export. The edit is held as a set of values, so undo and redo step through up to 50 changes and the original samples stay untouched.
On export the trimmed part is cut out first, the gain is applied to every sample, and the two fades are drawn over the ends as straight lines. WAV is always offered. A compressed Opus file is offered as well when your browser can encode one.
A one minute clip recorded at 48 kilohertz in stereo holds 2,880,000 samples in each channel. As a 16-bit WAV that is 44 bytes of header plus two bytes for every sample of every channel, which the page reports as about 11.0 megabytes. The same minute as Opus at 96 kilobits per second is about 703 kilobytes, roughly a sixteenth of the size.
Set the gain to +6. Decibels are a logarithmic ratio, so every sample is multiplied by 10 ^ (6 / 20), which is about 1.995. Set it to −6 and every sample is halved.
A sample that reaches past the maximum is clipped to the maximum on export, so raising the gain on a recording that is already loud will distort it.
Because WAV holds every sample in full. An MP3 or an M4A is compressed, and decoding it restores the full set of samples. Writing those out as WAV turns a small file into a large one.
Because your browser encodes it by playing the audio into its own recorder, in real time. A three minute clip takes about three minutes. WAV is written at once.
No. The file is read, edited and written back by your browser. Nothing is sent to a server, and nothing is kept when you leave.
The clip and the edit are both gone, and nothing is saved between visits. A recording handed over from the Audio Recorder is passed in memory and is cleared once the Editor takes it.
No. The Editor works on one clip at a time, on a single track. Trim, fade and gain are the operations it offers.
A WAV file is large because it stores sound as it was measured, with no compression. Its size is the sample rate times the channel count times the bytes for each sample times the seconds. At 48 kilohertz in 16-bit stereo that is 192,000 bytes for every second, whatever the recording contains. A minute of silence and a minute of an orchestra take the same space.
Only 44 bytes of a WAV file describe it: the sample rate, the channel count and the sample size. Everything after that header is audio. The format carries no patent and needs no codec license, which is why this Editor can always write one.
A fade here is a straight line, not a curve. Samples rise evenly from zero to full, so the loudness you hear climbs quickly and then levels off, because loudness follows a logarithm and a line does not.