Yamaha RX-Z11 - Manual (Page 160)

Sound field program information
160
En
■ 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