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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
Decoder Type
Decoder type. Selects the decoder used with the SUR. DECODE, THX, or MOVIE programs. See page 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
Level
Small value = 1 ms Large value = 99 ms
Level
Level
Level
Level
Level
Time Time Time
Source sound
Early
reflections
Small value = 0.1
Large value = 2.0
Sound source