Windows – Is there an easy way to split mp3 files?

I recently learned a neat trick. To join mp3 files together, you simply use the command (in Windows)

copy /b *.mp3 joined.mp3

and voila, you have one large mp3 file.

My question: is there a method of doing the opposite, i.e. splitting an mp3 file, this easily?

Solution:

There are two ways to split an MP3:

1. Decoding into a wave, splitting, and re-encoding.  This is the method Audacity uses and results in lost audio quality.
2. Splitting the MP3 directly.  You have a lower resolution for where to split, but the result is no loss in audio quality.  I’ve used MP3DirectCut with relatively good success.

Usually you will want to use the 2nd method since it is lossless, unless you really don’t care about your audio quality.