only decoding "real" DD

chunkt · Mar 3, 2007, 06:40 AM

Hello,

I use a Audigy 2 ZS and kx 3538m to decode the incomming AC-3 signal of my satelite receiver via cd_spdif. If there is a movie with "real" Dolby Digital everything works just fine. But if it is 2 channel I only get sound from front left and it sounds chopped.
With Creative driver both work fine but I want to use kx

Anybody an idea

Does it make sense to tray spdif in on ad_ext?

Maddogg6 · Mar 4, 2007, 11:43 PM

I noticed that stereo comes out of FXBuss 4 & 8 for me.
But I only really use AC3 on the S/PDIF (COAX/OPTICAL) in on my live drive.

And yes - I get SPDIF notifications from any SPDIF IN - but you can turn off that notification in the KX Settings > Driver Compatibility > 'Disable S/PDIF Notification'.

chunkt · Mar 14, 2007, 04:42 PM

Quote:

stereo comes out of FXBuss 4 & 8

Yes, thats right. Have you realised that FXBuss 8 sounds different?

I'll try Creative drivers again, because maybe my satelite box makes it sound chopped

edit: No problems with Creative drivers.
"dj_stick" often told in this forum about using AC3-Filter for decoding AC3.
Can anybody explain how to use AC3-Filter (or other) with kx or how to change the decoder of kx?

Maddogg6 · Mar 14, 2007, 08:01 PM

Note that AC3 filter wont decode EXTERNAL SPDIF inputs by its self.

I think DJ_stick was referring to using an INTERNAL DVD player on a PC - and use ac3 filter thru software - as opposed to using the Digital output most internal DVD drives have and thus connected to KX Digital CD Input > KX Ac3 decode.

You would need software to take SPDIF inputs and use AC3 filter to decode that way. I dont know of/if any exists.

chunkt · Mar 16, 2007, 10:13 AM

Does anybody else know a working solution to decode AC3 from SPDIF Input?
Creative works but I want the features of KX.

Maddogg6 · Mar 16, 2007, 11:15 AM

I spent a little time googling SPDIF AC3 decode - and only found a bunch of forums with un-resolved questions regarding this, but found 1 guy that said; in theory - using winamp and winamp version of AC3 filter and wimamp set to use its input plugin - *should* work. But I don't have a DD DVD to try it with so I can't confirm or deny this at this time.
My *digital* cable never seems to output any DD content - I *used* to see TV shows advertising they were broadcast in DD, but I don't see that anymore - figure its all for HDTV only to entice viewers to move to HDTV.. ??
But I don't have a know DD SPDIF to feed to my PC right now in any case.

chunkt · Mar 16, 2007, 11:41 AM

I'm from Germany and the 'main' channels send (at primetime) in DD.

Do you know anything more of this idea? I installed WinampAC3 but can't find where to set up spdif inputs...

By the way 3537 seems to work better

Maddogg6 · Mar 16, 2007, 12:36 PM

3537 doesnt support my A2 very well - so I will stay with 3538M (which did improve AC3 decoding since 3538H - btw)

Anyway - I have a input plugin that allows routing sound from a physical input into winamp - presumably for external DVD players of record players (remember vinyl - me either

)

So with a physical input set as winamps 'input' - and AC3 filter decoding AC3 - theoretaically you can decode AC3 that way..
The linein plugin Im trying is:
http://home.hccnet.nl/th.v.d.gronde/

No success for me, but I havent got AC3 filter working either for MP3 playback yet.. ?? I'll need to look closer at this.

Maddogg6 · Mar 16, 2007, 01:35 PM

AC3 filter for winamp seems to only function for *.AC3 files - or maybe ac3 encoded MP3 Files - it won't upmix - I'll have to find more 'surround' files to test that - but I can't get the Line In plugin to work for any physical inputs.

I'll keep playing around with it tho see if I cant figure it out... ??

chunkt · Mar 16, 2007, 07:38 PM

OK, with Line_in Plugin I got Winamp to accept the signal from spdif. But I can just hear strange sounds (like you unmute spdif for playback in KX Mixer).
AC3-Filter does not take and decode the signal.

We have to 'make' AC3-Filter an output plugin of Winamp

chunkt · Mar 19, 2007, 04:53 PM

Have you seen http://forum.videohelp.com/viewtopic...er=asc&start=0 ?

I've succeed to caputre the stream of my spdif and decode it. I did it as described in the last post of the link. AC3-Filter does not accept the original recorded stream, you have to use 'BeSplit' and the option for "Converting a Dolby-Digital-WAV into standard AC3 file".

I capure in wave therefore I have to convert to AC-3. I think the stream is 'real' AC3 but now we need a realtime filter.

chunkt · Mar 23, 2007, 03:22 PM

AC3-Filter v. 1.20b is out!
The changelog says " + SPDIF input support".

But I have not yet succeed to get it working. There is also less information of this new feature. Hope this will change.

Anything new from you?

Maddogg6 · Mar 23, 2007, 09:12 PM

Quote:

Originally Posted by chunkt

AC3-Filter v. 1.20b is out!
The changelog says " + SPDIF input support".

But I have not yet succeed to get it working. There is also less information of this new feature. Hope this will change.

Thats becuase its not implemented yet

Quote:

Originally Posted by AC3 Filter Website

* SPDIF input support. This will allow to decode external SPDIF source at future...

Quote:

Originally Posted by chunkt

Anything new from you?

Na, me either