Yamaha DSP-A2070 Operation Manual page 46

LIVENESS
How it Affects the Sound:
This parameter changes the apparent reflectivity of the walls in
the hall.
The early reflections from a sound source will lose intensity
(decay) much faster in a room with acoustically absorbent wall
surfaces than in one which has mostly reflective surfaces. A room
with highly reflective surfaces in which the early reflections decay
slowly is termed "live", while a room with absorbent characteristics in
which the reflections decay rapidly is termed "dead". The LIVENESS
parameter lets you adjust the early reflection decay rate, and thus the
"liveness" of the room.
What it Does:
Changes the rate at which the early reflections decay.
Control Range:
0 – 10.
Level Level
Small
Time
Dead
44
Level
Direct sound
Large
Time
Live
REV. TIME (Reverberation Time)
How it Affects the Sound:
The natural reverberation time of a room depends primarily on its
size and the characteristics of its inner surfaces. This parameter,
therefore, changes the apparent size of the acoustic environment
over an extremely wide range.
What it Does:
Adjusts the amount of time it takes for the level of the dense,
subsequent reverberation sound to decay by 60 dB (@ 1 kHz).
Control Range:
1.0 – 5.0 seconds.
The reverb time in a small-to-medium size hall would be between
1 and 2, and in a large hall it is normally between 2 and 3.
Level Level
Small
60 dB
Time Time
REV. TIME
Reverberations Reverberations
Level
Direct sound
Early reflections
Large
60 dB
Time
REV. TIME REV. TIME
Reverberations
60 dB
Time