Bedienungsanleitung Yamaha DSP-Z11 (Seite 131 von 150) (Englisch)

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■ Re-Equalization

The tonal balance of a film soundtrack will be excessively bright and harsh when

played back over audio equipment in the home because film soundtracks were designed

to be played back in large movie theatres using very different professional equipment.

Re-Equalization restores the correct tonal balance for watching a movie soundtrack in a

small home environment.

■ Adaptive Decorrelation

In a movie theatre, a large number of surround speakers help create an enveloping

surround sound experience, but in a home theatre there are usually only two speakers.

This can make the surround speakers sound like headphones that lack spaciousness and

envelopment. The surround sounds will also collapse into the closest speaker as you

move away from the middle seating position. Adaptive Decorrelation slightly changes

one surround channel’s time and phase relationship with respect to the other surround

channel. This expands the listening position and creates – with only two speakers – the

same spacious surround experience as in a movie theatre.

■ Timbre Matching

The human ear changes our perception of a sound depending on the direction from

which the sound is coming. In a movie theatre, there is an array of surround speakers so

that the surround information is all around you. In a home theatre, you use only two

speakers located to the side of your head. The Timbre Matching feature filters the

information going to the surround speakers so that they more closely match the tonal

characteristics of the sound coming from the front speakers. This ensures seamless

panning between the front and surround speakers.

■ BGC (Boundary Gain Compensation)

If your chosen listening room layout (for practical or aesthetic reasons) results in the

most of the listeners being close to the rear wall, the resulting bass level can be

sufficiently reinforced by the boundary that the overall sound quality becomes

“boomy”. THX Ultra2 receivers and controllers contain the BGC (Boundary Gain

Compensation) feature to provide an improved bass balance. “Bndry Gain Comp” can

be selected by setting “THX Ultra2 SWFR” to “Yes” in “THX Set” of “Manual Setup”.

■ 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), be sure to go to the “THX Set” screen and choose the setting that most

closely corresponds to the speaker spacing, which will re-optimize the surround sound-

field.

ASA is used in three modes; THX Ultra2 Cinema, THX Ultra2 Music and THX Ultra2

Games.

■ Dialogue normalization

Dialogue Normalization (Dial Norm) is a feature of Dolby Digital, which is used to

keep the programs at the same average listening level so the user does not have to

change the volume control between Dolby Digital programs.

When playing back software which has been encoded in Dolby Digital, sometimes you

may see a brief message in the front panel display which will read “Dial Norm X dB”

(X being a numeric value). The display is showing how the program level relates with

THX calibration level. If you want to play the program at calibrated theatrical levels,

you may wish to adjust the volume. For example, if you see the following message:

“Dial Norm + 4 dB” in the front panel display, to keep the overall output level at THX

calibrated loudness, just turn down the volume control by 4 dB. However, unlike a

movie theater where the playback loudness is preset, you can choose your preferred

volume setting for best enjoyment.

■ Elements of a sound field

What really creates the rich, full tones of a live instrument are the multiple reflections

from the walls of the room. In addition to making the sound live, these reflections

enable us to tell where the player is situated as well as the size and shape of the room in

which we are sitting.

There are two distinct types of sound reflections that combine to make up the sound

field in addition to the direct sound coming straight to our ears from the player’s

instrument.

Early reflections

Reflected sounds reach our ears extremely rapidly (50 ms to 100 ms after the direct

sound), after reflecting from one surface only (for example, from a wall or the ceiling).

Early reflections actually add clarity to the direct sound.

Reverberations

These are caused by reflections from more than one surface (for example, from the

walls, and the ceiling) so numerous that they merge together to form a continuous sonic

afterglow. They are non-directional and lessen the clarity of the direct sound.

Direct sound, early reflections and subsequent reverberations taken together help us to

determine the subjective size and shape of the room, and it is this information that the

digital sound field processor reproduces in order to create sound fields.

If you could create the appropriate early reflections and subsequent reverberations in

your listening room, you would be able to create your own listening environment. The

acoustics in your room could be changed to those of a concert hall, a dance floor, or a

room with virtually any size at all. This ability to create sound fields at will is exactly

what Yamaha has done with the digital sound field processor.

■ CINEMA DSP

Since the Dolby Surround and DTS systems were originally designed for use in movie

theaters, their effect is best felt in a theater having many speakers designed for acoustic

effects. Since home conditions, such as room size, wall material, number of speakers,

and so on, can differ so widely, it is inevitable that there are differences in the sound

heard. Based on a wealth of actually measured data, Yamaha CINEMA DSP provides

the audiovisual experience of a movie theater in the listening room of your own home

by using the Yamaha original sound field technology combined with various digital

audio systems.

■ CINEMA DSP HD³

The actually measured sound field data contain the information of the height of the

sound images. CINEMA DSP HD³ feature achieves the reproduction of the accurate

height of the sound images so that it creates the accurate and intensive stereoscopic

sound fields in a listening room.

■ SILENT CINEMA

Yamaha has developed a natural, realistic sound effect DSP algorithm for headphones.

Parameters for headphones have been set for each sound field so that accurate

representations of all the sound field programs can be enjoyed on headphones.

■ Virtual CINEMA DSP

Yamaha has developed a Virtual CINEMA DSP algorithm that allows you to enjoy DSP

sound field surround effects even without any surround speakers by using virtual

surround speakers. It is even possible to enjoy Virtual CINEMA DSP using a minimal

two-speaker system that does not include a center speaker.

■ Compressed Music Enhancer

The Compressed Music Enhancer feature of this unit enhances your listening

experience by regenerating the missing harmonics in a compression artifact. As a result,

flattened complexity due to the loss of high-frequency fidelity as well as lack of bass

due to the loss of low-frequency bass is compensated, providing improved performance

of the overall sound system.

Sound field program information

Yamaha DSP-Z11 Seite 131

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