Trim an MP3
Audio Trimmer cuts recordings on a waveform and exports MP3 or WAV. Listen around both selection boundaries: a quiet first consonant or musical attack can begin before the obvious waveform peak.
Open Audio TrimmerSelect the useful section
Open the recording and set the start and end of the part you want. Leave enough room around speech to avoid clipping the first or last word. For a loop, listen to the transition back to its beginning.
Adjust the cut
Add a short fade if the beginning or ending sounds abrupt. After changing level or normalization, listen for harsh peaks. Normalization can raise room noise along with the voice; it does not remove noise.
Export and listen
Download the selected format, then play the actual file through. Check the duration, fades and boundaries rather than relying only on the editor preview.
MP3 or WAV?
| Format | Suitable use |
|---|---|
| MP3 | A smaller file for ordinary listening and sharing. |
| WAV | An uncompressed working copy for another editor; 16-bit and 32-bit float are available. |
Starting from video
Audio Trimmer can open supported video audio tracks. Use Video & GIF Tool when the picture also needs editing.
Keep the selection or remove it?
For a clip from a long recording, select the wanted range and export Selection. For an interruption in the middle, delete that range, then listen at the join and export the whole edit.
| Control | Result |
|---|---|
| Trim to selection | Keeps the selected part and removes the surrounding audio from the edit. |
| Delete selection | Removes the selected part, joining what came before and after. |
| Export: Selection | Saves the selected range. |
| Export: Whole file | Saves the entire current edit, including audio outside the range. |
Example: keep a 25-second answer
If the useful answer runs from 12.4 to 37.4 seconds, that selection is 25 seconds long. Listen just before the start and just after the end so the first syllable and final breath are not cut off. Add a short fade when a boundary clicks, then play the downloaded file to confirm it contains that range rather than the complete source.
Speed, pitch and another MP3 export
The speed control changes pitch as well as duration; use it only when that change is intended. MP3 export encodes the edited audio again, so this is not a lossless MP3 frame-cutting tool. Save a WAV working copy if another editor needs the result before a final delivery encode. WAV avoids an additional lossy encode, but it cannot restore detail already lost in the source MP3.