The other night I put a rainforest mp3 sound clip on that runs for like an hour. I have surround sound in my bedroom and Burn started calling like crazy lol. That's the only way I got him to do calls, either that or if I squeak my computer chair sometimes he'll call. OH! and last night my hourly "beep beep" happened on my wrist watch and he let out a little call when that happened lol, he's a little clown.