A few points before I get into my question/issue: I am not looking for a way to convert file formats. The library and all music is located on another Mac on the local network (so it is not indexed ...
I am looking for the best way to convert convert MP3 audiobooks to M4B ones. Minimize the quality loose on recompression. Optionally be able to auto-choose best M4A/M4B compression method based on ...