Knowledge Base Article: KB1708
Topic: FAQ - Audio Issues

Title: Why will my MP3 file will not loop correctly? There's an audible stutter when it loops.


Last Reviewed: Apr 08, 2014
Keywords:

Q. Why will my MP3 file will not loop correctly? There's an audible stutter when it loops. When I download an MP3 version of a music loop track I bought at AudioSparx, when I play the track in a loop, there's a stutter at the point where the track should loop to the beginning. The WAV version of the same track works just fine. Why is that?

A.  MP3 files are, in general, inherently not good for looping. The audio content in an MP3 file is compressed into specific frame boundaries, and it turns out a small amount of audio silence is added at the beginning and end of the file, making it not provide for a seamless audio looping experience. The solution is to instead always use a WAV or AIFF format, which do not have the problem that MP3 files have when looped.

Additional independent discussion about this MP3 looping problem can be seen online here:

http://forum.audacityteam.org/viewtopic.php?f=13&t=2820

http://wiki.audacityteam.org/wiki/Looping

http://www.actionscript.org/forums/showthread.php3?p=709298

http://www.swishtalk.com/showthread.php?t=26952

There may be solutions for this using Audacity or other audio editing tools to adjust the MP3 file in a special way to make it loop seemlessly.

If the WAV file version you download from AudioSparx is too large of a file size for your specific project needs, you can re-encode the WAV file into a lower fidelity WAV file format. To do this, download CoolEdit 2000 from http://www.audiosparx.com/software, install the software and run it, open the WAV file up, then select Edit, Convert Sample Type and change it from 44Khz to either 22Khz or 11Khz, then save the new WAV file. The new file size should be substantially smaller than the original 44Khz file. 

---




Back to Top