Hm thats a neat idea a dont see why you cant. I just got a PI 3 and havent gotten alot of time to mess with it. however u can get a small display on Amazon thats touchscreen. from there u could launch a code that searchs a database or playlist on your sd or flashdrive or whatever you use for music and output to speakers
Of course bud. Good luck with it! id love to see the finished project.