Yamaha HTR-5990 - Manual (Page 119)

GLOSSARY
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ADDITIONA
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■ ASA (Advanced Speaker Array)
ASA is a proprietary THX technology which processes
the sound fed to 2 side and 2 back surround speakers to
provide the optimal surround sound experience. When you
set up your home theater system using all eight speaker
outputs (Left, Center, Right, Surround Right, Surround
Back Right, Surround Back Left, Surround Left and
Subwoofer) placing the two Surround Back speakers close
together facing the front of the room will provide the
largest sweet spot. If for practical reasons you have to
place the Surround Back speakers apart, you will need to
go THX Audio Set-up screen and choose the setting that
most closely corresponds to the speaker spacing, which
will re-optimized the surround sound-field.
ASA is used in three new modes: THX Select2 Cinema,
THX Music Mode and THX Games Mode.
■ Dolby Digital
Dolby Digital is a digital surround sound system that gives
you completely independent multi-channel audio. It
provides 5 full-range audio channels; 3 front channels
(left, center, and right), and 2 surround stereo channels.
An additional channel especially for bass effects, called
LFE (low frequency effect) is also provided giving the
system a total of 5.1-channels (LFE is counted as a 0.1
channel). By using 2-channel stereo for the surround
speakers, more accurate moving sound effects and
surround sound environment are possible than with Dolby
Surround. The wide dynamic range (maximum to
minimum volume) reproduced by the 5 full-range
channels and the precise sound orientation generated
using digital sound processing provide listeners with a
previously unheard of excitement and realism.
■ Dolby Digital EX
Dolby Digital EX creates 6 full-bandwidth output
channels from 5.1-channel sources. This is done by using
a matrix decoder that derives 3 surround channels from the
2 in the original recording. For best results, Dolby Digital
EX should be used with movie sound tracks recorded with
Dolby Digital Surround EX. With this additional channel,
you can experience more dynamic and realistic moving
sound especially with scenes that have flyover and fly-
around effects.
■ Dolby Pro Logic x
Dolby Pro Logic x is a new technology enabling 6.1 or
7.1 multi-channel playback from 2-channel or multi-
channel sources. There is a Music mode for music, a
Movie mode for movies and a Game mode for games.
■ Dolby Surround
Dolby Surround uses a 4 channel analog recording system
to reproduce realistic and dynamic sound effects: 2 front
left and right channels (stereo), a center channel for dialog
(monaural), and a surround channel for special sound
effects (monaural). The surround channel reproduces
sound within a narrow frequency range.
Dolby Surround is widely used with nearly all video tapes
and laser discs, and in many TV and cable broadcasts as
well. The Dolby Pro Logic decoder built into this unit
employs a digital signal processing system that
automatically stabilizes the volume on each channel to
enhance moving sound effects and directionality.
■ DTS 96/24
DTS 96/24 offers an unprecedented level of audio quality
for multi-channel sound on DVD-Video, and is fully
backward-compatible with all DTS decoders. 96 refers to
a 96 kHz sampling rate (compared to the typical 48 kHz
sampling rate). 24 refers to 24-bit word length.
DTS 96/24 offers sound quality transparent to the original
96/24 master, and 96/24 5.1-channel sound with
full-quality full-motion video for music programs and
motion picture soundtracks on DVD-video.
■ DTS (Digital Theater Systems)
Digital Surround
DTS digital surround was developed to replace the analog
soundtracks of movies with a 6-channel digital sound
track, and is now rapidly gaining popularity in movie
theaters around the world. Digital Theater Systems Inc.
has developed a home theater system so that you can enjoy
the depth of sound and natural spatial representation of
DTS digital surround in your home. This system produces
practically distortion-free 6-channel sound (technically,
left, right and center channels, 2 surround channels, plus
an LFE 0.1 channel as a subwoofer, for a total of 5.1-
channels). This unit incorporates a DTS-ES decoder that
enables 6.1- channel reproduction by adding a surround
back channel to the existing 5.1-channel format.
■ ITU-R
ITU-R is the radio communication sector of the ITU
(International Telecommunication Union). ITU-R
recommends a standard speaker placement which is used
in many critical listening rooms, such as mastering
studios.
■ LFE 0.1 channel
This channel is for the reproduction of low bass signals.
The frequency range for this channel is 20 Hz to 120 Hz.
This channel is counted as 0.1 because it only enforces a
low frequency range compared to the full-range
reproduced by the other 5/6 channels in Dolby Digital or
DTS 5.1/6.1-channel systems.
GLOSSARY
Audio information