I found this at http://www.3dsoundsurge.com:
AC-3 pass-thru under Windows2000
<< As you all know the new Live drivers for Windows 2000 still doesn't support AC3 pass-thru. I checked with Cyberlink (PowerDVD) and InterVideo (WinDVD) and neither of them know any soundcard on the market that offers this support. In case of PowerDVD the current version doesn't even support but the next version will. WinDVD already supports AC3 pass-thru but they did say it's rather difficult to implement it right now. This will however change soon since they have been working with MS to define a standard in DX8 that will allow easy AC3 pass-thru for all manufactures in WinME and Win2k.
Both InterVideo and Cyberlink did mention that one upcoming chip is expected to support AC3 pass-thru under Windows 2000 without waiting for the DirectX8 solution. InterVideo didn't mention which chip but Cyberlink said the chip that will work with their next version of PowerDVD is Cirrus Logic's CS4630. It's the one that VideoLogic/Turtle Beach will use. According to Turtle Beach the card is still on track for summer. Now it's certainly possible they may drop such a feature before they ship, especially if it's shipped late. I will update this post if I get a confirmation from Turtle Beach later today. >>
AC-3 pass-thru under Windows2000
<< As you all know the new Live drivers for Windows 2000 still doesn't support AC3 pass-thru. I checked with Cyberlink (PowerDVD) and InterVideo (WinDVD) and neither of them know any soundcard on the market that offers this support. In case of PowerDVD the current version doesn't even support but the next version will. WinDVD already supports AC3 pass-thru but they did say it's rather difficult to implement it right now. This will however change soon since they have been working with MS to define a standard in DX8 that will allow easy AC3 pass-thru for all manufactures in WinME and Win2k.
Both InterVideo and Cyberlink did mention that one upcoming chip is expected to support AC3 pass-thru under Windows 2000 without waiting for the DirectX8 solution. InterVideo didn't mention which chip but Cyberlink said the chip that will work with their next version of PowerDVD is Cirrus Logic's CS4630. It's the one that VideoLogic/Turtle Beach will use. According to Turtle Beach the card is still on track for summer. Now it's certainly possible they may drop such a feature before they ship, especially if it's shipped late. I will update this post if I get a confirmation from Turtle Beach later today. >>
with two sound cards present - SBLive Platinum & L-cheep-0 Yamaha YMF724 (playback device). When I disable the YMF724, it works fine. They both work fine in WinME.
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