Rear speaker always active is that possible?

Discussion in '3-D Audio' started by Rogacz, Oct 30, 2004.

  1. Rogacz

    Rogacz Porcupine Floyd

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    I was wondering if there is some way to upsample stereo signal to 6.1 including rear center. Surrounder+ has 6.1 support and it works well, but when I select surround option as "Copy" it routes stereo signal to 5.1 form, not 6.1, what means, that rear speaker is silent.
    However there is a switch on subwoofer that makes 5.1 upsample to 6.1, but it`s annoying to switch it every time I want to play games which support 6.1 very good (Call of Duty for instance). And it`s fun to listen to music with rear speaker on, especialy when I`m not sitting near my PC, but then I have to switch this thing, and it`s not so comfortable because it`s located on back side of woofer. So, is there any way to route it correctly?
     
  2. Rogacz

    Rogacz Porcupine Floyd

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    I made it working by adding two mono mix plugs into dsp and connecting them as follows:

    FXBus10, FXBus11 --> mono mix 1 --> mono mix 2 --> s_in
    FXBus12 --> mono mix 2

    Working cool ;)
     
  3. vandil

    vandil New Member

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    Hello, is there any "official" solution to this matter yet?

    For the past half an year I've been using kX 3538a with an Audigy 2 (6.1) and its 7 analog outputs. At some point last year I searched the forum but didn't find a complete solution for 6.1/7.1 upmix.

    For the time being, when I want to upmix 2.0/5.1 to 6.1 I do this:
    insert a mono-mix between the Surrounder+ and the epilog like that:
    sL, sR --> 50/50 mono mix --> k2 I2S 2 Left

    1. Thus the sCenter1 output is completely lost for software that support it.

    2. I have noticed that when playing stereo music with that 5.1->6.1 upmix enbled, the Front center and the Rear center channels sound very distorted at some frequencies. There is noise and crackle coming mainly from the Front center. But the Front center has nothing to do with the upmix!?
    Even more strange: if I mute the Rear center OR mute the Rear left/right, che crackle disappears. Muting the Front left/right has no effect. Wierd...

    Back to 1.: When I run a game with positional sound or when I watch a movie with PowerDVD, (which also can upmix to 6.1), I have to remove the mono mix and revert to
    sCenter1 --> k2 I2S 2 Left

    Today I searched the forum again hoping to find something more. I saw that several test versions have come out, so I uninstalled and deleted everything, then rebooted and installed 3538c, 3538g and 3538h as described in another thread. There seems to be no difference.

    Hello, Rogacz. By the threads I read, I can tell that you have been fighting the same problem for a long time. I tried the two mono mixes you suggested above but no sound came out of the rear center while playing an mp3. Honestly, I don't understand at all what these two mono mixes do :) Could you explain them to me (maybe in private)? Perhaps you have done some other tweaks to the DSP?

    In brief, my purpose is to have clear 6.1 sound at all times:
    - to listen to stereo sources (audio/movies/games) upmixed to 6.1 and without distortion;
    - to watch ac3/dts movies upmixed to 6.1 using the (still 5.1) ac3 filter;
    - to have direct 6.1 output in games that support positional sound, so that I can tell when I've been shot from behind ;)
    If there is a driver version or DSP configuration which can do this automatically, please let me know.

    Apart from that small inconvenience, I am very pleased with kX and am very grateful to the author(s)!
     

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