"Up Mix" from 2-channel "Stereo" audio content to 5.1/7.1 Surround

Hello,
This is a feature that I had strongly hoped would make it to Media Center in Windows 8, but didn't. Please consider this for a future update and/or the next version of Windows...
Feature Request: "Ability to Configure Stereo Up-Mix Capability in Windows Media Center and/or Windows Media Player from 2-channel Stereo to 5.1/7.1 Surround so Stereo MP3/WMA audio files output to *all* speakers in my system, not just the left and
right main speakers."
More information:
My audio content (MP3s, WMAs, etc.) are of course all 2-channel stereo format (left channel, right channel). My home theater PC outputs to my home theater receiver (which is a 2012-model Sony 5.1/7.1 receiver) via HDMI. When I play
2-channel music (MP3s, WMAs, etc.) from Windows Media Player (WMP) and Windows Media Center (WMC) both in Windows 7 and Windows 8, I only hear music from the left and right main speakers, *not* the subwoofer not the rear surround speakers.
In order for this to happen, WMP/WMC would need to "up mix" the stereo signal to take full advantage of my physical speaker configuration (as specified in my Windows' Playback Devices configuration, which Windows is able to discern from the capabilities of
my receiver). Media Center even has an Audio setup in which the end user configures the audio configuration to either Stereo, 5.1, or 7.1 yet music is still output over only two channels!
I would like to see WMC/WMP either "automagically" perform the "up mix" or provide the user with an option to enable/disable it when 2-channel Stereo audio content is played.
Too difficult? Rhapsody.com already accomplishes this with its online audio player! Note that my audio equipment has the capability of forcing output to two channels between the PC and the receiver, which my receiver will then up-mix, but this
requires physically maintaining a dip switch and also several button presses on my receiver's remote... and this physical configuration must be updated each and every time I switch between audio and movies. Too much work when it could be accomplished
automatically by WMP/WMC!
Thank you for your consideration of this feature request!
-Tretchie

The ability of windows to better control audio channel output is definitely an issue that needs to be fixed. It's really basic in this day and age where everyone and there mother has more than two speakers (i.e. 5.1 or 7.1). I understand that certain media
players, or certain decoders/channel mixers can be a workaround for this problem. But that's not enough. Today, we have many different sources for audio that are not just files on a computers:
1) Video/Movie files on computers (played through media center, MPC-HD or other)
2) MP3s/audio (played through same)
But there is also:
HTML5, webpages, Netflix, Amazon TV, Flash players, silverlight, etc. etc.
Hence why windows needs an option at the level of windows audio decoder to better control channel outputs over LPCM-HDMI! Either Mirroring L/R outputs to rear/side speakers, or, formal upmixing algorithms like Dolby Pro Logic etc., applied before
outputting over HDMI (Note I am NOT talking about bitstreaming!)
This is a trivial problem using WASAPI or ASIO. Why has windows audio not been properly updated since Windows XP!!
Recently, HTPCs and Media Centers are becoming many households primary source of entertainment.
Examples of some issues:
1) With no bitstreaming at all:
- Configuring HDMI audio "Playback device" to 5.1/7.1, and,
- Using a software decoder/media player to decode Dolby Digital, DTS, DTS-True HD, or Dolby True HD, and sending the data in LPCM over HDMI to the receiver/soundbar
-> works totally fine for outputting 5.1/7.1 surround from those sources
-> windows (i.e. software) completely fails in any ability to upmix 2.0 stereo sources to 5.1 or 7.1, or even mirror L/R channels to rear/side L/R channel for more room filling sound. Both these options should be available - upmixing with Dolby or other
for videos and mirroring/doubling the channels for music/MP3s.
Instead, windows audio sends silent channels over LPCM/HDMI when playing a stereo source. This has the added awful effect of not even letting my receiver upmix/mirror the outputs.
Hence, we need the ability to duplicate (for audio) and upmix (for videos) the L/R channels in a stereo source to the Rear L/R and or Side L/R channels through windows audio "playback devices" configuration before outputting over HDMI-LPCM!
In the day and age of 5.1 and 7.1 speakers this seems like such a BASIC feature that is missing.Otherwise, so many of us with an HTPC in our living room as our main source of media can't play music mirrored
through all our speakers, or watch videos with upmixed audio.
HDMI is the new standard, so this should really become an option.
I've done a fair amount of research on this problem, and do not believe there is any solution short of switching to optical (which I do not want to do because it can only carry 5.1) or, buying a fancy receiver instead of a soundbar with discrete rears and
a subwoofer (which I have) to do the mirroring/upmixing for me.

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Message was edited by: omshanti

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