1. Will you play a song for me?
2. Will you play a musical instrument for me?
3. Will you turn a umsic record on for me?
(Does #1 mean #2 or #3? What is the meaning of #1?)
1 - You're asking someone to play a song on whatever musical instrument he/she uses. If I asked this of my grandson, he'd play something on his clarinet. If I asked a friend of mine in California, she's play something on her piano.
2 - This is about the same thing, but it seems to be asking someone who can play several different instruments ... and the person can choose which one.
3 - This is not the same as the ones above. I'd also rephrase it: Would you turn on some music for me? (... implying that the music would be on the radio or some other source ... but not played by the other person)