AC3 decode problems

kaisersv · Dec 16, 2003, 06:55 PM

Well after some time spent on internet i found this forum and I hope that someone could help.

Ok, I have an SB Audigy I (dont know wich model - i think player)
Win2000
Yamaha 595rds reciever

My sound card is connected trough coaxial cable from the digital output (sound card) to digital input (reciever)
obviously ..
Well, problem started after new instalation of the Win2000 (had win2000 before also - but not this kind of problem)
I have digital output enabled (card`s Dolby Digital encode disabled), and what concerns normal audio playback there are no problems (mp3, TV audio, CD audio, non-AC3 divx movies, windows sounds .. etc. ) works al fine.
Problem starts when sound goes AC3 (PowerDVD, AC3 encoded divx)

Before my reciever reckognised DD stream and i could listen in Dolby Digital mode, but now when my reciever gets AC3 encoded signal goes Digital like before, but sound is interupted, I hear the sound but is not fluent, like someone turned volume off and on, off and on, off and on

Im using AC3filter but that souldnt be a problem because I used it before new instalation and worked fine, i did not change my hardware, im using the same software that used before.
I tried everything:
-PCM convertion 16-24-32bit-float,
-44,1k , 48k sampling
-updating drivers
-hardware acceleration settings
-checked the cables

It just dont work , enyone know why I cant listen (i can hear it, there is sound but is interrupted) to AC3 enceode now ?

thnx in advance

/Kaiser out

DallasStar · Dec 17, 2003, 02:53 AM

That's quite a puzzling problem. You may want to try turning dynamic compression on or off and see if either of those makes a difference (I'm not sure if the Audigy options have this, but if they do, it may help).

kaisersv · Dec 17, 2003, 10:03 PM

well , i tried .. but still no changes ..

DallasStar · Dec 18, 2003, 03:14 AM

From your initial post, it seems to me that you are using an external decoder. I think the problem may be with the decoder that you use with your speakers. To confirm this, you may want to configure your audigy such that the decoding is done by the drivers. Then, you could test whether the speakers still have the same problem if connected directly to the sound card instead of through the external decoder.

kaisersv · Dec 18, 2003, 11:30 AM

As I said im using my reciever to decode AC3 stream, and its connecteted trough single coaxial cable, but this worked on a previous instalation of windows2000 that i had. And if I enable software (SB AC3) decoding then i must conetct all that with 3 separate RCA-stereojack cables. So Im asking myself on this forum

whoat could happen to have sucha a problems after one instalation? Somehow im accusing my ACPI (ESCD) system to f**cked up my IRQ adresses- perhaps ... but if os it so, how can be this repaired ? would kx drivers help that ? ...

DallasStar · Dec 18, 2003, 01:51 PM

I would definitely give the kX drivers a try. They resolve many issues that people seem to have with Creative's drivers. If even the kX drivers don't work, I would do a clean install of the operating system because something obviously went wrong.

by the way, before installing kX drivers, make sure to use Creative's uninstaller to uninstall the drivers and then use DH Driver Cleaner to clean up all of the garbage Creative's uninstall utility leaves behind. (and, if you want, you could use the driver cleaner and then retry using the Creative drivers; maybe something went wrong in the driver installation.... its happened to me before).

DH Driver Cleaner can be found here:
http://www.hardwareheaven.com/cleaner/

BWX · Dec 18, 2003, 02:16 PM

You are using this AC3 fikter right? --> http://ac3filter.sourceforge.net/

Have you tried these decoders?
http://matrix-mixer.sourceforge.net/
http://liba52.sourceforge.net/

Also, by the sounds of it, you are having some kind of DRC problem- Under the gains box under the "main" tab, there is also a "normalize" box that can be checked or unchecked.

And also under the mixer tab, under "options" those "auto gain control" and "normalize matrix" have allot to do with how my DVD's sound- I alway uncheck "normalize matrix."

Also, I noticed different results using the Xvid codec instead of Divx, and it seemed to help out the tuning process. I've noticed different formats require totally different settings to work right. And you definitely want to uncheck "Bass redirection" if you are using a subwoofer.

Also- why aren't you using an optical cable out? It seems like that would be the best way to go.
or maybe I don't understand the problem you are having. I know I got AC3 filter to work absolutely perfectly for every form of AVI file I have- but sometimes I had to set it up completely different from one movie to the next. I have a Fortissimo III 7.1 too- so that's a little different too.

Dec 16, 2003, 06:55 PM	#1
kaisersv DriverHeaven Newbie Join Date: Dec 2003 Posts: 3 Rep Power: 0	AC3 decode problems Well after some time spent on internet i found this forum and I hope that someone could help. Ok, I have an SB Audigy I (dont know wich model - i think player) Win2000 Yamaha 595rds reciever My sound card is connected trough coaxial cable from the digital output (sound card) to digital input (reciever) obviously .. Well, problem started after new instalation of the Win2000 (had win2000 before also - but not this kind of problem) I have digital output enabled (card`s Dolby Digital encode disabled), and what concerns normal audio playback there are no problems (mp3, TV audio, CD audio, non-AC3 divx movies, windows sounds .. etc. ) works al fine. Problem starts when sound goes AC3 (PowerDVD, AC3 encoded divx) Before my reciever reckognised DD stream and i could listen in Dolby Digital mode, but now when my reciever gets AC3 encoded signal goes Digital like before, but sound is interupted, I hear the sound but is not fluent, like someone turned volume off and on, off and on, off and on Im using AC3filter but that souldnt be a problem because I used it before new instalation and worked fine, i did not change my hardware, im using the same software that used before. I tried everything: -PCM convertion 16-24-32bit-float, -44,1k , 48k sampling -updating drivers -hardware acceleration settings -checked the cables It just dont work , enyone know why I cant listen (i can hear it, there is sound but is interrupted) to AC3 enceode now ? thnx in advance /Kaiser out

Dec 17, 2003, 02:53 AM	#2
DallasStar Junior Join Date: May 2002 Location: Wave Existence Posts: 2,065 Rep Power: 0	That's quite a puzzling problem. You may want to try turning dynamic compression on or off and see if either of those makes a difference (I'm not sure if the Audigy options have this, but if they do, it may help). __________________ "A picture of my existence... would show a useless wooden stake covered in snow... stuck loosely at a slant in the ground in a ploughed field on the edge of a vast open plain on a dark winter night." --- Franz Kafka

Dec 18, 2003, 03:14 AM	#4
DallasStar Junior Join Date: May 2002 Location: Wave Existence Posts: 2,065 Rep Power: 0	From your initial post, it seems to me that you are using an external decoder. I think the problem may be with the decoder that you use with your speakers. To confirm this, you may want to configure your audigy such that the decoding is done by the drivers. Then, you could test whether the speakers still have the same problem if connected directly to the sound card instead of through the external decoder. __________________ "A picture of my existence... would show a useless wooden stake covered in snow... stuck loosely at a slant in the ground in a ploughed field on the edge of a vast open plain on a dark winter night." --- Franz Kafka

Dec 18, 2003, 01:51 PM	#6
DallasStar Junior Join Date: May 2002 Location: Wave Existence Posts: 2,065 Rep Power: 0	I would definitely give the kX drivers a try. They resolve many issues that people seem to have with Creative's drivers. If even the kX drivers don't work, I would do a clean install of the operating system because something obviously went wrong. by the way, before installing kX drivers, make sure to use Creative's uninstaller to uninstall the drivers and then use DH Driver Cleaner to clean up all of the garbage Creative's uninstall utility leaves behind. (and, if you want, you could use the driver cleaner and then retry using the Creative drivers; maybe something went wrong in the driver installation.... its happened to me before). DH Driver Cleaner can be found here: http://www.hardwareheaven.com/cleaner/ __________________ "A picture of my existence... would show a useless wooden stake covered in snow... stuck loosely at a slant in the ground in a ploughed field on the edge of a vast open plain on a dark winter night." --- Franz Kafka

Dec 18, 2003, 02:16 PM	#7
BWX unplugged Join Date: Nov 2002 Location: USNY Posts: 19,669 Rep Power: 110 System Specs	You are using this AC3 fikter right? --> http://ac3filter.sourceforge.net/ Have you tried these decoders? http://matrix-mixer.sourceforge.net/ http://liba52.sourceforge.net/ Also, by the sounds of it, you are having some kind of DRC problem- Under the gains box under the "main" tab, there is also a "normalize" box that can be checked or unchecked. And also under the mixer tab, under "options" those "auto gain control" and "normalize matrix" have allot to do with how my DVD's sound- I alway uncheck "normalize matrix." Also, I noticed different results using the Xvid codec instead of Divx, and it seemed to help out the tuning process. I've noticed different formats require totally different settings to work right. And you definitely want to uncheck "Bass redirection" if you are using a subwoofer. Also- why aren't you using an optical cable out? It seems like that would be the best way to go. or maybe I don't understand the problem you are having. I know I got AC3 filter to work absolutely perfectly for every form of AVI file I have- but sometimes I had to set it up completely different from one movie to the next. I have a Fortissimo III 7.1 too- so that's a little different too. __________________

Dec 17, 2003, 10:03 PM	Thread Starter #3
kaisersv DriverHeaven Newbie Join Date: Dec 2003 Posts: 3 Rep Power: 0	well , i tried .. but still no changes ..

Dec 18, 2003, 11:30 AM	Thread Starter #5
kaisersv DriverHeaven Newbie Join Date: Dec 2003 Posts: 3 Rep Power: 0	As I said im using my reciever to decode AC3 stream, and its connecteted trough single coaxial cable, but this worked on a previous instalation of windows2000 that i had. And if I enable software (SB AC3) decoding then i must conetct all that with 3 separate RCA-stereojack cables. So Im asking myself on this forum whoat could happen to have sucha a problems after one instalation? Somehow im accusing my ACPI (ESCD) system to f**cked up my IRQ adresses- perhaps ... but if os it so, how can be this repaired ? would kx drivers help that ? ...