Hey, after rebuilding my system I decided to install the new WinDVD 4, instead of the older 3.1 that I had been running. So, I installed the Plus version, which included SRS, DD, DD-EX encoding, as well as DTS. Now, I have a SB Audigy soundcard, with the SB 5300 speaker system (a 5.1 system). If I start up the software with a DVD, I get noise from the speakers. I have to switch to analog (2 speaker) mode then back in order for the Audigy to "grab" the DD stream and decode it using the onboard DD decoder. Also if I try to switch to anything other then the analog 2 speaker sound, it does not let me. The old 3.1 version detected the sound card, and did not exhibit this odd "noise" problem. Interestingly, if I do a system info test, I get the following data back: Version: 4.0.05.043 Navigation: Type: DVD Region: 1 Drive: F: TV System: NTSC. Video: Hardware: Vendor: ATI Connection type: MEDIASUBTYPE_DXVA_ModeMPEG2_D DXVA acceleration type: IDCT Downstream renderer: CLSID_OverlayMixer Stream: Type: Encrypted MPEG2 Bitrate: 9.800 Mbps Framerate: 29.970 Hz Resolution: 720x480 Aspect ratio: 16x9 Audio: Info not available CPU: AMD Family: 7 Model: 6 Instruction support: Intel MMX: Enabled Intel SSE: Not detected Intel SSE2: Not detected AMD 3DNow!: Enabled AMD Enh 3DNow!: Enabled AMD 3DNow! Pro: Not detected Note the Audio not available info..... Anyone else encounter this, and have they found a solution?