Hello all, I have never used a arduino before. I have used other micro controllers, raspberryPi and some PLC’s though. So overall project is a modern-day flash mp3 player, inside a 8-track. What I want to do is install the actually mp3 player inside the 8-track player, and a small cheap flash drive in each of the 8-track with the original songs. I love 8-tracks and such however heat kills them, and they are very sensitive 
, but I like the look and feel of the 8-track in my car. So I am curious what i would want to use or how to go about the mp3 player part. I want to have line-level audio out to go to a external amp. I want to the the music play automatically once a 8-track is inserted and use the “selector” switch as a next button. I could easily go out and get a nice touch screen head unit, but where is the fun in that ! 
Well thank you for reading !