[tetrisgm]

Would this dedrm my audible stuff?

[Vuizur]

No, for this you need https://github.com/rmcrackan/Libation

[kranner]

Can do it with plain old ffmpeg:

https://news.ycombinator.com/item?id=23541424

[C-Loftus]

If you are looking to dedrm ebooks, that can be done via a calibre plugin. For audiobooks, I am not sure.