Playing a Sound
http://msdn.microsoft.com/en-us/library/bb195053(v=xnagamestudio.40)

Looping a Sound
http://msdn.microsoft.com/en-us/library/dd940203(v=xnagamestudio.40)

Adjusting Pitch and Volume
http://msdn.microsoft.com/en-us/library/dd940201(v=xnagamestudio.40)

Playing a Song
http://msdn.microsoft.com/en-us/library/dd231914(v=xnagamestudio.40)

Applying a 3D Positional Effect to a Sound
http://msdn.microsoft.com/en-us/library/bb447687(v=xnagamestudio.40)

Streaming Data from a WAV file
http://msdn.microsoft.com/en-us/library/ff827591(v=xnagamestudio.40)

Using XACT
http://msdn.microsoft.com/en-us/library/ff827590(v=xnagamestudio.40)