: How to create an mp3 file that is shorter than 1 second? I have a music file that is shorter than one second and whenever I save it as mp3, there is always empty space to make it bigger. I'm assuming there's a minimum for

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I have just done a few experiments using Audacity running under Linux.

I created an mp3 file of length one second, which saved as a file of size 17729 bytes which opens as a 1 second audio file. After cutting it in half (in Audacity) and saving (technically: exporting) it, I get a file of size 9370 bytes which opens as a 0.5 second audio file.

So, I believe that any problem you are having is due to the software you are using, an not due to some limitation of the mp3 file format.

Edit:

Further experiments with 0.25 seconds and 0.1 seconds produce ever smaller file sizes. There will be a minimum, due to the embedded mp3 tags in the file.