Gives your Xonar super powers!, well almost, i find it realy useful when i wanna switch between headphones and speakers, it also has a classic volume adjustments

Currently Supported Hardware:

ASUS
Xonar D1, DX, D2, D2X, DS, DSX, DG, DGX, Essence ST, Essence STX, Xense, Xonar H6
AuzenTech
X-Meridian 7.1, X-Meridian 7.1 2G

Currently Supported Operating Systems:

Windows XP and later, both x86 and x64.

get it at http://maxedtech.com/xonarswitch-beta-testing/