Realtek has released new ALC650 Drivers vesrion 3.37.1

Update DirectSound 3D Positional Audio Engine to fix some noisy problem for some DirectSound3D game (like Unreal Tournament 2003). A3D compatible Correct the gain settings of master volume for ALC650 ver.F

Get it here

http://www.realtek.com.tw/downloads/downloads1-3.aspx?software=True&compamodel=ALC650