http://www.mp3-box.org/mp3-joiner-splitter/
What is a good MP3 splitter — joiner utility?
Seeking a good freeware (or ungimped shareware) utility to split / join MP3 files. Command line is fine.. it just has to work correctly.
I’ve been using Pop MP3 Splitter and Pop MP3 Joiner from DPTop.com but it doesn’t correctly locate the end of the file. So my split MP3s are missing the last bit of info.
Note: the last file is missing between 5 secs and 60 secs of data. Waaaaaay too much.
Try audacity (freeware), handles more than MP3 files.
Using MP3 Splitter & Joiner