Sony STR-GX909ES Operating Instructions Manual page 34

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The sound heard in a place such as a concert hall or a
movie theater consists of direct sound, and early reflected
sound (early reflections) and a reverberative sound
(reverberation). The acoustics of the room affect the way
these three sounds are heard. We can estimate the size or
the type of a hall by listening to and differentiating these
three kinds of sound.
The STR-GX909ES/STR-GX808ES reproduces the early
reflections and the reverberation using its digital signal
processor and allows you to design a variety of sound field
in your own room. The unit incorporates 10 types of the
SOUND FIELD program, and you can select the desired
SOUND FIELD mode by pressing the SOUND FIELD
button. Also you can adjust several parameters within
each mode to maximize the effect in your listening room.
Types of the sound
Early reflections
Reverberation
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To | Direct sound
Pe oa
The sound transition of the direct sound, early reflections
and reberveration can be illustrated as below:
Transition of the sound
Direct sound
Early reflections Reverberation
cece
Early reftection time
Note
Each surround mode has several internal (fixed) parameters
in addition to the adjustable parameters explained in this
section. Therefore, surround modes will not become the
same even if you set all adjustable parameters the same.
34
Characteristics of the SOUND FIELD program
SOUND FIELD | Characteristics Appropriate
music
source
DOLBY SUR Decodes programs
processed with the Dolby
surround.
Adds the reflection of a
theater to decoded
signals of the Dolby
prologic decoder.
Adds the reflection of a
large concert hall to
decoded signals of the
Dolby prologic decoder.
Reproduces the acoustics
of a rectangular concert
hall with soft sound. Itis
effective for playing a
program source with hard
sound.
medium-size
orchestra or
classic
The equalizer boosts high |Pops or
and low frequencies, and |dance music
the dynamic sounds are
reproduced.
Reproduces the acoustics
of a live house. The
equalizer boosts high
frequencies, adding
sharpness to sounds.
Reproduces the acoustics
of an opera house,
keeping the clearness of
the vocal music.
Reproduces the acoustics
of a church made of wood
Reproduces the acoustics
of an outdoor stadium with
a long pre-delay time. Itis
effective for playing a
program source recorded
in a stadium.
Pops or rock
music
ACOUSTIC The surround effect is
defeated.