Integra DRX-7.1 Basic Manual page 86

> Specifications > Advanced Setup
■ T-D (Theater-Dimensional)
In this mode, you can enjoy a virtual playback of
multichannel surround sound even with only two or three
speakers. This works by controlling how sounds reach the
listener's left and right ears.
■ THX
THX is a series of specifications for the accurate
reproduction of movies propounded by the film director
George Lucas. THX listening modes include the THX
Cinema mode, and using technology such as THX
Loudness Plus and Timbre Matching, the sound of a movie
theater is reproduced accurately.
THX technology:
A movie soundtrack is mixed in large-scale theater
specially made for mixing that is called a dubbing stage
on the assumption that the soundtrack is played in such
theaters with similar equipment and conditions. These
sound tracks are recorded as is, even when recording
to a DVD-Video, for example, without making any
modifications to suit a home theater. THX technology is
able to reproduce the theater sound in a home theater
environment by minimizing acoustic and spatial deviation.
• THX Loudness Plus
THX Loudness Plus is a new volume control technology
featured in THX Ultra and THX Select certified AV
receivers. With THX Loudness Plus, home theater
audiences can experience the rich details of surround
sound at any volume level. If the volume is turned down
below the reference level, elements of sound in a certain
range are lost or the sound is perceived differently by
audience. THX Loudness Plus compensates for the
tonal and spatial shifts that occur when the volume level
is reduced, by intelligently correcting the levels of the
surround channels and their frequency response in the
environment.
• Re-EQ
The speakers for the front channel are installed behind the
screen in a movie theater. For this reason the high range
is enhanced in the front channel of the sound track to take
50
> Listening Modes
account of acoustic characteristics such as the necessity
to penetrate the screen. Re-EQ adjusts soundtrack with
enhanced high range to make it suitable for home theater.
• Timbre Matching
The perception of the human ear differs depending on the
direction of the sound. Movie theaters have many surround
speakers installed so they are great at surrounding the
viewer with natural sound, but home theaters have only
two surround speakers installed. The Timbre Matching
function filters the signals sent to the surround speakers
and adjusts the tonal characteristics of front speakers and
surround speakers to create smooth sound movement
from front speakers to surround speakers.
• Adaptive Decorrelation
Although movie theaters have many surround speakers
to surround the room with sound, home theaters normally
have only two surround speakers. Such two surround
speakers give a headphone-like sound, not a broad and
embracing surround sound. If the listener moves away
from the middle of the surround speakers, sound from
the surround speakers mixes with that from the near
speakers and cannot be distinguished any more. Adaptive
Decorrelation slightly changes the time axis and phase
between the surround channels so you can enjoy the same
kind of breadth of sound you can in a movie theater even
with only two surround speakers.
• ASA (Advanced Speaker Array)
ASA is a technology patented by THX to provide a broad
surround sound experience by adjusting the side and back
surround speaker sounds respectively. When installing the
surround back speakers, first select the distance between
the two surround back speakers in the THX Audio settings.
This setting optimizes the surround sound environment.
THX listening modes:
– THX Cinema: Use in a home theater environment
for playing a soundtrack that was recorded with the
intention of it being played in a movie theater or similar
large area. In this mode, THX Loudness Plus is set to
the theater level and Re-EQ, Timbre Matching, and
Adaptive Decorrelation are all enabled.
> Network Functions
Troubleshooting
– THX Games: Use for high-fidelity spatial reproduction of
game sound. THX Loudness Plus is set to a level suited
to the audio level of the game and Timbre Matching is
enabled.
– THX Music: Use mainly for music sources that are
clearly mastered to a much higher quality than movie
audio. THX Loudness Plus is set to a level suited to the
playback of music and Timbre Matching is enabled.
– THX S Cinema (THX Select Cinema): The THX Select
Cinema mode provides a high-quality surround sound
experience by expanding movie sources recorded in
5.1 ch for 7.1 ch playback. In this mode, the THX ASA
processing technology gives smooth transition between
side and back surround sounds creating the best
atmosphere and directional sense of surround sound.
– THX S Games (THX Select Games): Select the THX
Select Games mode to play game sound recorded
in a multichannel format. In this mode, the THX ASA
processing technology creates a 360-degree sound field
with game sound recorded in PCM, DTS, Dolby Digital
and other 5.1 ch formats.
– THX S Music (THX Select Music): Select THX Select
Music to play music sources recorded in a multichannel
format. In this mode, the THX ASA processing
technology creates a broad and stable back sound
field for music sources recorded in 5.1ch such as DTS,
Dolby Digital, and DVD-Audio.
■ TV Logic
Suitable for TV shows produced in a TV studio. This mode
enhances the surround effects to the entire sound to give
clarity to voices and create a realistic acoustic image.
■ Unplugged
Suitable for acoustic instruments, vocals and jazz. This
mode emphasizes the front stereo image, giving the
impression of being right in front of the stage.
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