If you want to cut or trim audio quickly, you can use these free online MP3 cutter apps. There is no need to install an audio editing app just to cut audio to make it a ringtone or something similar.

So I am in need of mp3 files in various sizes. Sure, I can take an existing mp3 and cut it to whatever size I want, but I'm not exactly sure where the id3 tag sits in the file (beginning or end?) and ...