Python library to modify MP3 audio without transcoding

Question

I am looking for some general advice about the mp3 format before I start a small project to make sure I am not on a wild-goose chase.

My understanding of the internals o

Answer 1

Not a direct answer to your needs, but check the mp3DirectCut software that does what you want (as a GUI app). I think that the source code is available, so even if you don't find a library, you could build one of your own, or build a python extension using code from mp3DirectCut.