The dogs usually ignore music, unless it's played very loudly when they leave the room. There must be something slightly disturbing in the Stravinsky though. My Cyrus 6 CD player and amplifier teamed with Dynaudio 52 speakers pick out exceptional detail but no enough to explain the behaviour of the Cavalier. He must have thought there were strange animal noises in the background. He started barking, then jumped on my lap and finally dashed off to find his basket.