It really shouldn’t be that difficult. As it turns out, it is.

Here’s how I pulled it off:
cat *.mp3 > output.mp3
audacity output.mp3
Re-export and smooth out your id3 tags and such.

There’s really no good way to do this under linux. Everything screws up some fiddly bit that turns out to be important to something that’s not fault tolerant.

So screw it up! cat everything together in the true spirit of linux! Hack shit together until it works.

Just use audacity to smooth everything out. People will thankyou.