I downloaded an app to my phone called Shazam. You switch the app on and hold your phone up to a speaker playing music and the app identifies the song and the artist. I tried in on lots of different music that I have stored on my computer and it worked perfectly, even identifying an obscure Noel Coward song and Puccini's Madama Butterfly (you know the song, the one that makes you cry), except it must have been sung in Italian, who would have thought, and so it gave me the answer in Italian.
Maybe one day I will actually use it as intended when I hear a song I like. Weeks have passed and I haven't yet.