Asus Essence STX II User Manual page 41

GX Mode. DirectSound D Game Extensions mode to support EAX and DirectSound D
Hardware extensions for lots of DirectX/DirectSoundD games on Windows Vista.
Hi-Fi Mode. This mode is set for Hi-Fidelity playback, where all effects will be cleared to
keep the original digital data and analog output quality as high as possible.
Music Mode. This mode is set for Music playback.
Movie Mode. This mode is set for DVD Movie playback.
Game Mode. This mode is set for Games.
ASUS Essence STX II 41