I wish this computer would play that music! Most of my cats ignore music, although the first social cat I knew, who'd bonded tightly with me, tried to understand every word and seemed distressed by not being able to make sense of human songs.
But I *swear* my cat Bisquit (Ivy's mother, Heather's and Irene's grandmother) sang a song of celebration when her daughter Candice caught and killed a mouse all by herself. It went on much longer, with much more variation, than ordinary "come out to play or fight" caterwauling. She didn't interfere with anything Candice was doing; she just parked herself under my window, and watched Candice, and sang until I came out to see what was going on, and sort of nodded to me, and resumed singing.