Yamaha RX-V3900 Owner's Manual page 74

Graphical user interface (GUI) menu
Sound field parameter
Liveness
Sur. Liveness
SB. Liveness
Rev. Time
72
En
Liveness. Surround and surround back liveness. Adjusts the reflectivity of the virtual walls in the hall by
changing the rate at which the early reflections decay. The early reflections of a sound source decay much
faster in a room with acoustically absorbent wall surfaces than in one which has highly reflective surfaces. A
room with acoustically absorbent surfaces is referred to as "dead", while a room with highly reflective
surfaces is referred to as "live". This parameter lets you adjust the early reflection decay rate and thus the
"liveness" of the room.
Control range: 0 to 10
Small reflected
sound
Small value = 0
Reverberation time. Adjusts the amount of time taken for the dense, subsequent reverberation sound to decay
by 60 dB at 1 kHz. This changes the apparent size of the acoustic environment over an extremely wide range.
Set a longer reverberation time to get more sustaining reverberation sound, and set a shorter time to get
articulate sound.
Control range: 1.0 to 5.0 s
Reverberation
Rev. Time
Sound source
Short
reverberation
Small value = 1.0 s
Features
Source sound
Dead
Time Time
Source sound
Early reflections
60 dB 60 dB
Rev. Time
Live
Time
Large reflected
sound
Large value = 10
Reverberation
60 dB
Rev. Time
Long
reverberation
Large value = 5.0 s