Audio Editor Online: Cut, Edit and Process Sound

No. The editor keeps the original recording whole and builds the file from it by the list of edits. The limiter turns on only if the sum of the tracks or a raised level goes above 0 dB — then the line under the result says by how many decibels the peaks were held down. When you save to 16-bit WAV, the untouched parts of the recording match the original. MP3, M4A and OGG are encoded again on saving — to avoid losing quality between edits, save to WAV or FLAC.

Select the part and press Apply on the processing you need — it lands only on the selection. With no selection, processing applies to the whole chosen track. The result becomes a history step: you can undo it, and the original sound under it is not lost.

Not in sound: noise removal calls the same engine as the Audio Denoiser tool, and pitch and tempo call the same one as Change Pitch and Audio Speed Changer. In the editor it is convenient to apply them to a part and combine them with editing, while the standalone tools offer more fine settings.

The project rate is set by the first recording you add — it is not resampled. Other files are converted to that rate when added. Recordings with more than two channels open as stereo: the left and right channels are taken.

They shift: deleting closes the gap, and slowing down or speeding up a part changes its length, so the tail of the track follows. If the length must stay the same, use Silence instead of Delete. With the All tracks button on, an edit applies to every track at once, and they stay in sync.

Yes. The project — the timeline with its edits and the sound, including the results of processing — is saved in this browser after every edit and comes back by itself the next time you open the page; earlier projects are in the My work list. The step history comes back with the project: you can undo what was done before the reload too; the oldest steps that carry heavy processed audio may not return. The browser may delete saved work if the disk runs out of space, so it is better to build a finished recording into a file.