i’ve made a mistake of buying an audiobook from audible.com. before doing it i’ve briefly checked if the file will be provided in mp3; according to audible.com/sh yes. in reality – no.
i’ve installed a prehistorically-looking AudibleManager, downloaded the book and… now what? there’s no option to export to mp3. after a while of googling i’ve found AAX to MP3 – open source and free converter of DRM-infested audible files to mp3s that i can later play on my phone without installing unwanted bloatware.
2023-04 update: i’ve succesfully used BookLibConnect to fetch AAX files and AaxAudioConverter to convert AAX to MP3.
2024-05 update: this time i’ve used Libation.
Only Google audiobooks provided in MP3 and with no DRM. The Audible audiobooks and iTunes audiobooks are in DRM-ed AAX or M4B, according to this passage:
Audible VS Google Audiobooks VS Apple Books: Which is the Best?
Also, you can convert aax to mp3 with the help of some aax to mp3 converter.
As for me, I used to using convert Audible AAX books to MP3 by using AudKit Audible MP3 Converter. The converting speed is super amazing, which could reach 100X or even faster. Maybe you can have a try.