Windows 7 loud continuous beep

[larry141094]

Hey, i'm using Dolphin for Windows 7, i am on a Macbook, i am using the Xbox 360 wired controller in congjunction with my mouse as a wiimote, i was playing Michael Jackson: The Experience, and after all the intro's were finished and i got to the main menu, a loud beep started, it was a single continuous beep that showed no signs of stopping.
Is there a way to stop this?