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Sound field parameter descriptions
You can adjust the values of certain digital sound field parameters so that the sound fields are recreated accurately in your
listening room. Not all of the following parameters are found in every program.
Sound field parameter
Features
Decode Type
Decoder type. Select the decoder used with the selected sound field program. The decoder parameters for
“Surround Decoder” vary depending on the selected decoder type. See page 66 for details.
Init. Delay
Sur. Init.Delay
SB. Init. Delay
Initial delay. Presence, surround, and surround back sound field initial delay. Changes the apparent size of the
sound field by adjusting the delay between the direct sound and the first reflection heard by the listener. The
smaller the value, the smaller the sound field seems to the listener.
y
When you adjust the initial delay parameters, we also recommend that you adjust the corresponding room
size parameters likewise.
Control range: 1
to 99 ms (Init. Delay)
1 to 49 ms (Sur. Init. Delay and SB Init. Delay)
Room Size
Sur. Room Size
SB. Room Size
Room size. Presence, surround, and surround back room size. Adjusts the apparent size of the sound field.
The larger the value, the larger the surround sound field becomes. As the sound is repeatedly reflected around
a room, the larger the hall is, the longer the time between the original reflected sound and the subsequent
reflections. By controlling the time between the reflected sounds, you can change the apparent size of the
virtual venue. Changing this parameter from one to two doubles the apparent length of the room.
y
When you adjust the room size parameters, we also recommend that you adjust the corresponding initial
delay parameters likewise.
Control range: 0.1
to 2.0
Source sound
Early
reflections
Time
Time
Time
Delay
Delay
Delay
Sound source
Reflection face
L
eve
l
Small value = 1 ms
Large value = 99 ms
Le
v
el
Le
v
el
Le
v
el
L
eve
l
Le
v
el
Time
Time
Time
Source sound
Early
reflections
Small value = 0.1
Large value = 2.0
Sound source
