Last updated on March 8th, 2009
Hi ladies and gents.
Bitperfect streaming is still a big issue for HTPC owners.Encripted HD audio:
Still no solution even Asus Xonar is advertised as trasferring bitstream as is.
Encripted HD audio as bitstream or decoded LPCM is not possible to be listened as is since PAP has not been unlocked by any hardware audio card as of right now.Decripted HD audio:
Even decripted audio (using Any DVD HD) is not possible to be listened as is.
This time Vista mixer downconverts audio to 16/48.
I have Creative SB Xİ-Fi card on Vista 32 SP1 and i’ve been investigating for some time on how to overcome that issue.Converting DTS-HD MA, True HD or PCM to flac and remuxing to mkv and listening that created mkv could be the workaround? The answer would definitely be NO.
The method i use:
AnyDVD HD for decripting.
Eac3to for demuxing:
Demuxing video and remuxing to mkv container as video and at the same time demux audio and transcode it to flac.
MKVMergeGui for remuxing to mkv container:
Remux video.mkv and audio.flac via MKVMerge Gui.
For decoding you need Madshi’s Madflac decoder.Re-encoded files with libav to flac over libav, arcsoft or nero decoders are 24 bit indeed.
But when you introduce them to directshow workflow with any player, Dx orients them to Vista’s mixer which will downconvert them to 16/48.
When you open the created mkv with MPC-HC, madflac decoder pininfo gives the info as it is 24 bit. But you can not listen it as it is because of the Vista mixer.
What you see is not really what you listen.PS: Setting Vista mixer to 24/96 is not a workaround; it is just a signal processing. Mixer just upconverts your downconverted signals; which means a real sound quality loss...So you have to bypass Vista’s mixer via WASAPI exclusive streaming.http://wiki.hydrogenaudio.org/index...._Windows_Mixerhttp://wiki.hydrogenaudio.org/index....oo_out_wasapi)SO HOW TO LISTEN BIT-EXACT AUDIO ON MY HTPC?Audio Only Files:
You may want to extract HD audio files from BD disks and convert them to flac or wav/pcm.
Or you may want to extract mlp files from your DVD-Audio discs and convert them to flac: (for decoding flac you must have madflac decoder loaded.)http://forum.doom9.org/showthread.ph...23#post1254323
These are the audio-only applications which have wasapi plugins:
and commercial MediaCenter13 (no plug-in seperately)Video+audio files:
You have to use ReClock 126.96.36.199 in "slave reference" mode.
Lets have a look at how to get bit-exact audio from an HD audio file muxed with a video into a container.
Here are the pre-conditions:1) Source:
It must be the original disk or ISO for LPCM, THD or DTS-HD including files.
Otherwise Arcsoft will downconvert the source 96/6/24 audio to 96/2/16, in other words you can never get bit-exact audio when you open an m2ts file on HDD.
But you can open an mkv which has a flac if you have madflac filter and you can listen bit-exact audio.2) Audio Decoder:
The decoder must decode Hi-Resolution audio.
For THD, DTS-HD and PCM, Arcsoft Audio Decoder HD is able to decode all of those formats as is. (including latest 129; since the decoder is the same with what 125 or 121 uses.
) I gonna explain why 129 downconverts then
For flac: Madshi's madflac decoder is able to decode 96/24 flac.3) Direct-show route or application itself:
Even TMT uses the same decoder, as i told before, after v.125, started to downconvert 96/6/24 source to 48/6/16.
How do i know decoder itself doesn't downsample?
*When you convert THD or DTS-HD to flac via eac3to, it is gonna use, for instance your 129's decoder and you will get 96/6/24 flac.
""I can even use arcsoft filters of latest 129 in MPC-HC (or Graphstudio -graph can be used with lower 125 versions) and get bit-exact. In this case you don't need ISO as well; you can directly open m2ts from HDD. (What is boring here is everytime you have to set audio to 5.1 in Arcsoft Audio DecoderHD properties page.)
Have a look at if you wonder how to configure MPC-HC:http://forum.slysoft.com/showpost.ph...&postcount=110
Or you will find more details here:http://www.avsforum.com/avs-vb/showt...9#post16011249
So what i'd advise to TMT owners is:
If your retail is lower than .126, return back to .121; i don't advise 125 since some may live CPU utilization issues. And delete checkupdate.dll and checkupdate.set under ProgramFiles\\Arcsoft\\Totalmedia Theatre.
If your retail is upper than 125, try to configure MPC-HC with Arcsoft's filters. What is boring here everytime you open a file, you have to configure Arcsoft Audio DecoderHD to 5.1 manually.
Good news is you don't need original disk or ISO anymore.4 )Audio renderer:
ReClock 188.8.131.52 and over; latest stabil version is 184.108.40.206:http://forum.slysoft.com/showpost.ph...78&postcount=1
After decode the audio as is and get rid of the application's frustrating DirectShow route, you have to by-pass Vista's mixer which means you have to use WASAPI exlusive mode.
The only renderer which has WASAPI support is ReClock right now.
Here is the configuration of ReClock:
And here is the config of the renderer:
Also see the second part of this post:http://www.avsforum.com/avs-vb/showt...0#post15994670
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _Please make test before posting. For details check these posts:http://www.avsforum.com/avs-vb/showt...4#post15771144http://www.avsforum.com/avs-vb/showt...6#post15771446http://www.avsforum.com/avs-vb/showt...1#post15789431
_ _ _ _ _