Audible
From charlesreid1
To extract audio from Audible books:
- Go to My Library page in Audible [1] and download your audio books by clicking the Download button. They will be downloaded as .aax files.
- Use the inAudible oranization's audible-activator repository [2] to extract your activation bytes from Audible's servers
- Use ffmpeg to decrypt the audio from the file [3]
Nice short step by step [4]