The Doctor: I can show you what you're missing with this thing. Simple little radio.
Dalek Caan: What is the purpose of that device?
The Doctor: Well, exactly, it plays music. What's the point of that? Oh, with music, you can dance to it, sing with it, fall in love to it. Unless you're a Dalek, of course, then it's all just noise!
(The Doctor points the sonic screwdriver at the radio causing a piercing shriek)