Asus Xonar U3 User Manual

27ASUS Xonar U3
8.8 DS3D GX2.5 and DSP Modes
Xonar U3 is introducing an innovative technology –DirectSound 3D Game
Extensions v2.5 (DG3D GX2.5)- to restore DirectSound 3D Hardware acceleration
mode and its subsidiary EAX effects on Windows 7/Vista for 3D games.
Unlike some proprietary API like OpenAL, DG3D GX doesn’t require games to
support OpenAL API. All existing games compatible with Microsoft DirectX and
DirectSound 2D/3D will be supported with DG3D GX technology. Before you start
EAX and DG3D HW games, please enable DG3D GX on the Xonar U3 audio
center, and disable the function after the games.
In addition, Xonar U3 also offers a Hi-Fi mode for hi-delity playback without any
effect processing to keep the original audio delity. Every time you turn on Hi-Fi
mode, Xonar U3 will clear all sound effects. It’s also recommended to use Hi-Fi
mode for audio quality tests (using RMAA software or another machine-based
measurement). Use the DSP mode button as the quick setup if you don’t wish to
know the details of the effect setup.
No sound effects will be applied to high-denition 96KHz/192KHz content.

Asus Xonar U3 Specifications

General

Internal	No
Audio quality	16 bit
Audio output channels	2.0 channels
Line-out Signal-to-Noise Ratio (SNR)	105 dB
Line-out Total Harmonic Distortion (THD)	0.005 %
Headphone outputs	2
LED indicators	Yes
Dolby technologies	Dolby Digital Live, Dolby Headphone, Dolby Pro-Logic IIx, Dolby Virtual Speaker
Audio system maximum sampling rate	48 kHz

Weight and Dimensions

Depth	79.5 mm
Width	30.6 mm