A lot of obscure/odd audio media can be found on old cassette tapes, particularly old prerecorded tapes people used to record music on and then stashed away. Because of this, I made a short video showcasing how to rip cassette tapes: youtu.be/qByPfzAW9Ng
This video goes over the interface I use (you can also do this with a CDr recording device), how I set my computer, DAWs (I always rely on Audacity) and some of the basics of cleaning up your ripped tracks.