[Rockaria]

http://forum.doom9.org/showpost.php?...1&postcount=42

Originally Posted by scharfis

IMO this matrix is useless.
Just imagine the MonoSurround-condition: Rear left and rear right are carrying the same signal.
With this matrix you'll succesfully eliminate the mono surround out of the downmix.
This means to me, that

Dolby Pro Logic Left   Right   Center Rear Left Rear Right 
Left Total        1.000 0.000  0.7071  0.866     -0.5 
Right Total      0.000 1.000  0.7071  -0.5        0.866

is a derivation from the faulty matrix above and should not be used.
You may experience wider sounding surround channels, because every middle information (mono information) is weakened in the surround downmix.

Originally Posted by scharfis

or Rockarias style:

Lt = FL{0°} + 0.7071 C{0°} + 0.7071 LFE{0°} + 0.866 SL{0°} + 0.5 SR{180°}
Rt = FR{0°} + 0.7071 C{0°} + 0.7071 LFE{0°} + 0.5 SL{180°} + 0.866 SR{0°}
and
Lt = FL{0°} + 0.7071 C{0°} + 0.7071 LFE{0°} + 0.866 SL{+90°} + 0.5 SR{-90°}
Rt = FR{0°} + 0.7071 C{0°} + 0.7071 LFE{0°} + 0.5 SL{-90°} + 0.866 SR{+90°}

but you are testing two types of four concurring types.
the traditional mixing with 180°
and rockarias inverse mixing with 90°


(this is the thing I always tried to explain as center surround issue to Rockaria. But it seems to be a slightly different effect here)

Originally Posted by scharfis

I found, that Rockaria's personal matrix has problems with centered surround effects that are meant to be reproduced by both surround speakers (DPLII) or the surround-back speaker (DPLIIx).
Inverting the phase of one of the Surround channels like this modified matrix does can enhance the perceived width and separation of both channel because it is simply something like crosstalk reduction. But At the cost of centered surround sounds. That's why I prefer the unaltered matrix.

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@scharfis, do you see your posts are 'arbitrary itself' ?
Would you stop posting against anybody with no basis & no understanding at all? That does not help anything.

traditional mixing with 180° :: what the traditional means? your myths?, your Gods' words?
inverse mixing with 90° : youself admitted you have no clear picture of the DPL II model already?
If you continue posting like this, I will regard them as personal attacks, only to depreciate any resonable conversations.