Was it a howl-along?

The Sydney Opera House on Saturday was the scene for a concert by performance artist Laurie Anderson.

So far nothing unusual about that, except for the fact that Anderson debuted her "Music for Dogs" composition ... for dogs.

Here's the Associated Press story via Yahoo.com.

Hundreds of dogs and their owners bounced around as Anderson entertained them with 20 minutes of thumping beats, whale calls, whistles and a few high-pitched electronic sounds imperceptible to human ears.

"Let's hear it from the medium dogs!" Anderson called out from the stage, as a few dogs yipped in return. "You can do better than that — come on mediums! Whoo! WHOOOOOO!"

Anderson said the idea for the concert developed out of a chat with cellist Yo-Yo Ma while they were backstage at a graduation.