mpTrim

mpTrim is a simple and easy-to-use free MP3 editor for your Windows PC. Use it to improve your MP3 collection. The Mp3 Trim app is free - no evaluation period or time limit. Enjoy!

What exactly can mpTrim do for you?

• It can trim MP3s - removing silent or unwanted parts.
• It can adjust the volume of MP3s. Volume change can be manual or automatic (volume normalization).
• It can fade in/out MP3s (to fix abrupt beginning/ending).
• It can clean up MP3s and recover wasted disk space.
• It keeps the music quality intact, no matter how many times you process an MP3 because it works directly in the MP3 format without having to decode/re-encode. That also makes it very fast.

FAQ

Q: How does mp3 trim clean MP3s?
A: Most MP3s contain some 'junk'. So mpTrim parses the files looking for MPEG-audio frames and discards the rest... you end up with an absolutely clean MP3 containing only MPEG-audio frames (and eventually an ID3 tag). It has a little indicator of how much space you'll recover when saving an MP3. Check below the 'from the end' sentence in the mpTrim main window.

Q: Does the app support VBR files?
A: Absolutely. Note that VBR MP3s usually have extra 'seek information' embedded in them. mpTrim displays 'VBR+' when seeking information is present, and 'VBR' (no plus) when it's missing. Seek information is used when you 'seek' (move) directly to some point of an MP3. Seek information isn't part of the MPEG standard, doesn't affect the music quality, and is not useful for continuous playback. But some players' time display may be confused if it's not present.

Q: What is 'digital silence'?
A: Digital silence is a bunch of samples set artificially to 0 (silence!) to separate music tracks on CDs. It can easily make its way in MP3s at the beginning or at the end as a little bit of 'dead-zone'. One nice feature of the app is that it is automatically able to recognize the silence in most MP3s. Who wants to store silence? Let's keep only music.

Q: What's the biggest file size that it can handle?
A: mpTrim file size support is not expressed in raw byte size but in a number of MPEG frames. That makes the assertion of the limit a little more difficult. But for MPEG 1 layer III at 44.1kHz (MP3s made from Audio-CDs and usually in this format), It reads up to 7 minutes of music, so should be able to process most music tracks.

Note: Advanced silence detection and batch mode is disabled in the demo version.