HTPC stuttering DTS sound using Onkyo SR674E

Five_Star

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Hi,

Got a problem playing back very high quality DTS soundtracks from movies. The DTS sound is 6channel 48000Hz audio at 1536kbit/s and contained inside a .mvk

I've been using both media player classic and VLC with all the necessary filters installed. The audio is output via optical direct to my amp as the display shows DTS or Dolby Digital as required.

The problem is the audio stutters like crazy, the picture is fine. using a Core 2 duo 2.66 2GB ram the CPU doesn't break a sweat while playing the file.

I've seen some reports of people using VLC on OSX with this problem but no windows users, it can't just be me can it?

Any help on this matter would be greatly appreciated
 
DolbyDigitalTHX said:
The actual PC processing power is less important in this case as the audio is just streamed out, and the amp does all the decoding.

I think for me it was the fact that DTS could only be processed if it was a certain standard bitrate/format (on my amp, that is).
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I think your right, its down to the signal the amp is getting. I've got some DTS audio tracks that do play when others wont, so frustrating. I think a rebuild is on the cards.
 
Ubern00b I've got AC-3 filter installed but some DTS movies work, some don't (i.e. the ausio stutters) Can you confirm you've had this problem??

The HTPC does not process the soundtrack at all, it goes direct to the amp via SPDIF using optical.

Problem is some DTS soundtracks, most notibly DTS sound from 1080p .mkv files stutters terribly. From other reading on the web some people belive that VLC is at fault when playing the .mkv

Is anybody else able to play high quality 1080p x264 encoded .mkv files that have the full bitrate DTS audio without problem? If so please can you let me know what files you were playing so I can do a test on them.
 
DolbyDigitalTHX I was thinking exactly that too, but I've been assured by people on AV forums that DTS 48000Hz @ 1536kbit/s is the highest non HD level it can go.

I think its going to come down to a rebuild as no body else has even heard of this problem let alone experienced it.

So, what are the correct codecs and drivers needed to play HD .mkv files with SPDIF passthrough to my amp?

Just FFDshow and AC-3 filter?? or is more needed?
 
ubern00b said:
Ive experianced it :D MediaPlayerClassic as player, FFDSHOW or CoreAVC for video decoder, AC3Filter for audio decoder. Solved all my problems.
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Excellent, was getting worried it was just me going insane. Going to rebuild now with these settings, I'll owe you a pint if this works :)
 
ubern00b you are a genius for that, rebuilt XP SP2, Media player classic, FFDshow and AC-3 filter is all I've installed and ALL my .mkv files with DTS sound are playing beautifully through my amp :D

Seems to be a magic setting in AC-3 filter setting DTS to "Auto" it just makes it work.
 
DolbyDigitalTHX said:
Hang on a sec - didn't I say to play with AC3 Filter from the start? We had to go through nearly 20 posts for this?

...and what credit do I get? nada, zilch, nil points...




PS is it obvious I'm just trying to clock up my post count? ;)
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yeah, its obvious ;)

I did actually have AC-3 filter instalelled when I checked your first post, but I think the machine was so screwed with various versions of other codecs and filters (FFDshow audio, Cyberlink DTS etc...) that I lost sight of that and only got a result after a rebuild. Don't think I wanted to go through this full blown procedure I'd have taken a 5 minute fix two days ago if I'd been more on the ball. so thanks to DolbyDigitalTHX too
 
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