Surround Controller Update
3
Pro Logic II
Dolby Pro Logic II is a new DSP processing mode designed for
two-channel sources, whether or not they are encoded for Dolby
Surround. It re-creates 5.1-channel movie surround from the
two-channel source, using improved decoding techniques that
preserve the directness of the sound field, resulting in enhanced
image stability compared with standard Pro Logic decoding.
Meridian’s implementation of Pro Logic II was the first in the
world to receive Dolby approval, and uses priorietary code
based on 48-bit precision to give outstanding clarity.
Pro Logic II is available for any two-channel PCM or analogue
input. It is not available for two-channel Dolby Digital inputs; if
you want to use Pro Logic II with a two-channel Dolby Digital
soundtrack from a DVD you should first switch your DVD player
to PCM (two-channel) output mode.
Pro Logic II preset parameters
The following preset parameters are available for all the Pro
Logic II presets:
Parameter Options What it changes
Steered All Steered Rear, Which of the four
Steered Side, surround channels
Steered All are generated by
steering.
R Delay 10ms to 25ms* The delay of the rears.
S Delay 10ms to 25ms* The delay of the sides.
Rear -30db to +10db The level of the rears.
Sides -30db to +10db The level of the sides.
* 0 to 15ms in the PLII Music preset.
Three new presets have been added for Pro Logic II: PLII
Music, PLII Movie, and PLII THX.
§ 1 PLII Update 2/3/01, 1:52 pm3
