MP3 Speed is a free tool that will change the speed of your MP3 files without altering the pitch.

Using the program is very simple: you just need to select the folder housing the audio file you want to edit, click it, and select the option to convert.

You'll barely need to configure the program, and in just a few seconds you'll have a lightly accelerated version of the song in question.

MP3 Speed is also a useful if you want to speed up an audiobook; you won't notice the difference with a little acceleration, but you'll gain back a good amount of time overall.