Yamaha DSP-A2 Owner's Manual - Page 59

English ADVANCED FEATURES q 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. LIVENESS (Presence Liveness) Adjusts the apparent reflectivity of the walls on the front presence sound field. The larger the value, the more reflective the front presence sound field becomes. S. LIVENESS (Surround Liveness) Adjusts the apparent reflectivity of the walls on the rear surround sound field. The larger the value, the more reflective the rear surround sound field becomes. Level Level Direct sound Level Small Dead Time Large Time Live Time q 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 Direct sound Level Early reflections 60 dB Small 60 dB Large 60 dB Time REV. TIME Reverberations REV. TIME Reverberations Time REV. TIME Reverberations Time 57