All the music and comedy, and 99% of the Old Time Radio (OTR)fell off the back of the Internet truck right onto my computer mostly in 2003 when I discovered Kazaa and RIAA dingbats hadn't yet started mucking around with available files. I never bothered to rip my own CDs because it was easier to get them off the Internet.

The audio books are free Net Library downloads converted to mp3 format and ripped copies of Audio Book CD's from the Library. I did buy a few compilations of old time radio on CD in mp3 format http://www.otrstreet.com/xxxframes.html to get more complete OTR collections than I already had of the Jack Benny Show, Gunsmoke, Dragnet, Suspense Theater, Fred Allen Show, LuxTheater, and You Bet Your Life (Groucho Marx).