Why does my friend's dog hates music?

Question

My friend's dog goes berserk when he hears music. He barks, scratches, and bites.

Answer 1

is it only certain kind of music or only when it is load or maybe the pitch, maybe the treble and/or bass     need a little more info.sorry

Answer 2

the tone ,or volume ,may be hurting his ears ,dogs have a high sensitivity level to noises and can hear things we don't.

Answer 3

Dogs have much better hearing than we do, so it could sound positively earsplitting to them when it's not too loud for us.  

Answer 4

Is the music too loud? Dogs have an EXCELLENT hearing source. Their hearing is 10 TIMES better than an average human's hearing. So his ears might be sensitive to the music. If you notice that he doesnt like it, then dont play it while he is there.. Of course he might not like it...