Is Nipper real?

I am not exactly talking about a dog that is listening to a high fidelity recording good enough for the dog to recognize his master's voice. But my little Corgie bounds down three flights of stairs when I hit the power button in my listening room. Then she runs in circles until the music starts, whereupon she lies still until it stops. And then she barks until I shut it off or put on something else. Nobody who has watched her can explain it. And she reacts not at all to my kitchen set.