ac3 decoding problem

SB0060 · Dec 13, 2002, 11:12 PM

>> ac-3 decoding is already supported for all the cards (ezboard.com)

I've tried playing a several DIVx with AC3 Audio using WinDVD Platinum (Dolby Digital/Surround Supported), and I don't get any output on the FX Bus AC3 Outputs programmed. I only get a very high volume noise in the FX Bus Wave Left Output. My card is a SB0060 and I'm using the latest drivers Version 5.00.3528 ALPHA.

Is this supported or am I doing something wrong?

**Eugene Gavrilov** · Dec 13, 2002, 11:49 PM

Quote:

I don't get any output on the FX Bus AC3 Outputs programmed

ac-3 decoding is supported, but you have to switch your player to 'spdif' mode

/Eugene

SB0060 · Dec 17, 2002, 02:33 AM

Thanks for the prompt reply, but until today I wasn't able to test it again.

I've switched the Audio Output Configuration of WinDVD to "Digital (SPDIF) out to External Processor" and still not getting output out of FXBus4-9(AC3) or FXBus0-1(Wave0/1)

I've also tested it with PowerDVD and didn't get output too.

Any ideas?

R-Type2000 · Feb 12, 2003, 06:09 AM

Quote:

Originally posted by SB0060
Thanks for the prompt reply, but until today I wasn't able to test it again.

I've switched the Audio Output Configuration of WinDVD to "Digital (SPDIF) out to External Processor" and still not getting output out of FXBus4-9(AC3) or FXBus0-1(Wave0/1)

I've also tested it with PowerDVD and didn't get output too.

Any ideas?

I also have the same problem with the ac-3 decode. I'm running windvd 4.0 on winxp, 3529 drivers and SB0090 audigy platinum. I tried mapping the various ac-3 fxbus's directly to epilog with no success..
Any ideas?

R1CH · Feb 13, 2003, 08:25 PM

I have success on my CT4832 10k1 [7800] with 3528, mapping the outputs and enabling SPDIF on my player works, however the sound is delayed by a noticable amount, I'd guess 500ms or more. Using the 'ac3filter' DShow filter available on sourceforge, if I set speaker mode to anything other than stereo or mono, I get loud buzzing sound coming from all channels. Using stereo mode works and I get sound without delay, but of course thats losing most of the point of AC3 since it is downmixing to two channels. AC3 support still has some way to go I imagine

. Still, that's the only major thing missing for me, everything else works great.

**Eugene Gavrilov** · Feb 14, 2003, 03:29 PM

ac-3 support is not currently very stable

however, 3530 will introduce a WDM multichannel support, that will enable you to use your player in 4 and 5.1 modes -- most of the issues with ac-3 playback should be solved

/Eugene

RIV@NVX · Feb 14, 2003, 03:43 PM

Quote:

Originally posted by Eugene Gavrilov
ac-3 support is not currently very stable

however, 3530 will introduce a WDM multichannel support, that will enable you to use your player in 4 and 5.1 modes -- most of the issues with ac-3 playback should be solved

/Eugene

Even the DirectSound/KernelStreaming players?

imperia · Feb 19, 2003, 12:48 AM

Quote:

Originally posted by R1CH
I have success on my CT4832 10k1 [7800] with 3528, mapping the outputs and enabling SPDIF on my player works, however the sound is delayed by a noticable amount, I'd guess 500ms or more. Using the 'ac3filter' DShow filter available on sourceforge, if I set speaker mode to anything other than stereo or mono, I get loud buzzing sound coming from all channels. Using stereo mode works and I get sound without delay, but of course thats losing most of the point of AC3 since it is downmixing to two channels. AC3 support still has some way to go I imagine . Still, that's the only major thing missing for me, everything else works great.

"loud buzzing sound" fixed here by selecting PCM Float in ac3filter settings page. PCM 16-bit is not working.

Dec 13, 2002, 11:12 PM	#1
SB0060 DriverHeaven Newbie Join Date: Dec 2002 Posts: 3 Rep Power: 0	ac3 decoding problem >> ac-3 decoding is already supported for all the cards (ezboard.com) I've tried playing a several DIVx with AC3 Audio using WinDVD Platinum (Dolby Digital/Surround Supported), and I don't get any output on the FX Bus AC3 Outputs programmed. I only get a very high volume noise in the FX Bus Wave Left Output. My card is a SB0060 and I'm using the latest drivers Version 5.00.3528 ALPHA. Is this supported or am I doing something wrong?

Dec 17, 2002, 02:33 AM	Thread Starter #3
SB0060 DriverHeaven Newbie Join Date: Dec 2002 Posts: 3 Rep Power: 0	switch your player to 'spdif' mode Thanks for the prompt reply, but until today I wasn't able to test it again. I've switched the Audio Output Configuration of WinDVD to "Digital (SPDIF) out to External Processor" and still not getting output out of FXBus4-9(AC3) or FXBus0-1(Wave0/1) I've also tested it with PowerDVD and didn't get output too. Any ideas?

Feb 13, 2003, 08:25 PM	#5
R1CH DriverHeaven Newbie Join Date: Dec 2002 Posts: 3 Rep Power: 0	I have success on my CT4832 10k1 [7800] with 3528, mapping the outputs and enabling SPDIF on my player works, however the sound is delayed by a noticable amount, I'd guess 500ms or more. Using the 'ac3filter' DShow filter available on sourceforge, if I set speaker mode to anything other than stereo or mono, I get loud buzzing sound coming from all channels. Using stereo mode works and I get sound without delay, but of course thats losing most of the point of AC3 since it is downmixing to two channels. AC3 support still has some way to go I imagine . Still, that's the only major thing missing for me, everything else works great.

Feb 14, 2003, 03:29 PM	#6
Eugene Gavrilov kX Project Lead Programmer and Coordinator Join Date: Dec 2002 Posts: 3,119 Rep Power: 75	ac-3 support is not currently very stable however, 3530 will introduce a WDM multichannel support, that will enable you to use your player in 4 and 5.1 modes -- most of the issues with ac-3 playback should be solved /Eugene