Originally Posted by magicj1
I am after some advice
I own an Asus xonar 1.3 deluxe, I have been using this to decode TrueHD and play through the analog outputs. I now own a processor that can decode TrueHD via HDMI, so I have no need for the decoding to be done by this SC.
The question is, do I need a SC that can bitstream TrueHD, or could I set the xonar to bitstream only, no decoding?
I have tried just using the NVIDIA GEForce 9400 that is fitted in my PC, this 'seems' to be able to bitstream 'DTS & DD', unfortunately not TrueHD via 'HDMI'
Any advice guys?
Please keep it simple, thanks!
If you are just using the analog outputs, you are not necessarily even using the card (nor need to use the card) to do the decoding. Before I bought my Xonar, I decoded via software and outputted via analog on my onboard sound-card. But it sounds like you are figuring this out. There are some caveats to this, but if done right this does not break PAP nor does it down-sample. The only reason to have a Xonar is to bitstream these formats bit-for-bit over HDMI to an AV that can decode them. There are enough software solutions out there now that one can even [correctly] decode DTS-MA/TrueHD via Software and just send the decoded PCM to your PC. (In fact, that way is often recommended...)
What are you using for playback? If you are going to decode via software, it is (heh naturally) now a software issue rather than a hardware one. Personally I use MPC-HC with K-Lite Codec Pack (ffdShow/LAV Filters) and madVR and do the whole filter/codec thing. If you are not familiar with that, it is a deep pool to jump into, but it will give the best results. Otherwise, since you are still using a Xonar, I'd recommend sticking with Arcsoft TMT, since they play nice together...your options are just more limited.
Your last sentence confuses me - perhaps you are confused as well: Bitstreaming
are two different things. "Bitstreaming
" means that you are passing along am untouched pre
-decoded signal. This is what the Xonar is designed for - it will pass along a pre-decoded bitstream to your AVR, at which point your AVR will read "TrueHD" and do the decoding there. Decoding
is the process of taking the coded data (DD/DTS/TrueHD/DTS-MA etc) and decoding it into a generic stream (L-PCM to be specific.) If you decided to decode your signal there, remember from then on it will be passed as L-PCM generic data-stream. (Which is what will showup on your AVR's display, which is not a bad thing at all, it is just saying that the "work" not being done by the AVR and is being done by the HTPC...)
I hope this helps rather than confuses you..
(I admit that I think I grasped the crux of your post and/or confusion halfway into my response...