ATi graphics card could only do LPCM audio output but no direct bitstream to AVR for decoding. Moreover, most software Blu-ray players such as PowerDVD, WinDVD, will downsample the LPCM to below 16bit/48KHz audio quality (usually as MP3 bitrate) on general audio/HDMI devices unless it supports AACS compliant protected audio playback as Xonar HDAV did with Arcsoft TMT player. So, you could not get the real uncompromising HD audio inside the Blu-ray disc.

It sounds the only solution to pass lossless, non-downsampled 24bit/192KHz LPCM or bit-stream of Dolby TrueHD and DTS-HD Master audio from the computer. Many Blu-ray and HTPC users are looking for this kind of solution. Graphics and chipset makers may be still lack of audio expertise to fulfill the Full-HD audio solution.

不知Oxygen HD音效卡的Dolby/DTS技術是否為編碼輸出功 能？如果是，就很酷了，我一直想為我的Media Center規劃一張好的音效卡，如果可以直接輸出Dolby/DTS訊號，就可以直接用一條光纖線輸出到擴大機了，隨時都有5.1聲道效果。