Here’s a great article on the first portable music added to cars in the 50’s/60’s. Yes there was music before the 8-track. Today’s reality of virtual music that can be carried in your hand-held device would not have been possible without the experiments with record players in cars. Enjoy! https://www.lelandwest.com/blog/listing.asp?2022/3/the-history-of-record-players-in-cars