You can use Airfoil to do this via your wireless network. Run Airfoil Speakers Touch on the iPad, and the Airfoil application on your Windows or Mac OS X computer.
Can I use my iPad to as a speaker for my laptop?
You can use Airfoil to do this via your wireless network. Run Airfoil Speakers Touch on the iPad, and the Airfoil application on your Windows or Mac OS X computer.