Yamaha RX-V3800 - Manual (Page 80)

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Graphical user interface (GUI) screen
■ 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
Decoder Type Decoder type. Selects the decoder used with the SUR. DECODE or MOVIE programs. See pages 71
and 72 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. This adjustment is especially effective for the CINEMA DSP programs.
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. This adjustment is especially effective for the CINEMA DSP
programs.
Control range: 0.1 to 2.0
Source sound
Early
reflections
Time Time Time
Delay Delay Delay
Sound source
Reflection face
Le
v
el
Small value = 1 ms Large value = 99 ms
L
eve
l
L
eve
l
L
eve
l
Le
v
el
L
eve
l
Time Time Time
Source sound
Early
reflections
Small value = 0.1 Large value = 2.0
Sound source