Set-up of time delay in the central
channel
Sometimes several people are listening to
the music, and the space is limited. In this case,
you can install three speakers(two front ones
and a central one) as shown in Fig.1. With the
distance to the listener being approximately the
same. The central channel delay is to be set at
“0”.
Should the central speaker be in close
proximity to left and right front speakers as
shown in Fig.2,or the central speakers in one
line, as shown on Fig.3 with the delay value of
the central to be set at “0”.
Finally, if it will be necessary to install the central
speaker behind the left and right front speakers,
the delay value shall be set at “0”.
“Night” mode
The Dolby Digital system provides an
extremely broad dynamic range of playback
sound-from gentle to roaring. It creates the
presence effect, especially while seeing motion
pictures. However, at night a powerful sound
with a broad dynamic range may give pleasure
to you, but disturb and annoy your family and
neighbors.If you just decrease the volume, you
will immediately notice that you ceased to hear,
e.g., dialogues as clear as you do at normal
volume, and such sound effects as rustle,
whisper etc have merely disappeared. To avoid
this, you just have to decrease the volume of
“soft” sounds with the volume of “average”
sounds left unchanged, i.e. Just decrease the
dynamic range of sound accompaniment. Only
Dolby Digital system provides for such a method
of sound control. It uses the principle of
compressing the acoustic signals dynamic range
while recording; there fore; while playing an
inverse transformation(volume expansion) takes
place. This is called “night” mode. The regulation
limits are restricted; however, to avoid
distortions of resultant signal.
Dolby Digital Dolby Por Logic surround
Rear channel Stereo 20 Hz-20kHz
mone channel with limited
frequency range(100Hz-7khz)
Low-frequency
channel(subowwfer)
Autilable, 20-120Hz N/a
Sound field
distribution
Multivariate From left to right from right to left,
from front to rear, from rear to
front
Channels
6 independent channels, each
reproducing its own signal at a time
4 segmented channels. Only one
channel is decoded at a time.
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