Creative 1820 用户手册

5 - Effects
Core Effects Descriptions

76

Creative Professional

Reverberation is a simulation of a natural space such as a room or hall. The stereo reverb 
algorithm is designed to simulate various halls, rooms and reverberation plates.

Decay time defines the time it takes for the reflected sound from the room to decay or 
die away. The diagram below shows a generalized reverberation envelope.

After a short pre-delay period, the echoes from the closest walls or ceiling are heard. 
These first echoes, or early reflections, vary greatly depending on the type of room. Some 
time after the early reflection cluster ends (late reverb delay), the late reverberation (a 
dense cloud of complex wall reflections) begins and decays according to the time set by 
the Decay Time parameter.

Diffusion is the amount of scattering and density of the late reverberation cloud. Rooms 
with many complex surfaces have more diffusion than bare rooms.

High frequency energy tends to fade away first as a sound is dissipated in a room. The 
High Frequency Damping parameter adjusts the time it takes for the high frequency 
energy to die away and thus changes the characteristics of the room. Rooms with 
smooth, hard surfaces are more reflective and have less high frequency damping. Rooms 
filled with sound absorbing materials, such as curtains or people, have more high 
frequency damping.

The Low Frequency Damping parameter adjusts the time it takes for the low frequencies 
to die away. This control adjusts the “boominess” of the room.

Decay Time

Sets the length of the Late Reverb. Range 1.5 to 30seconds

Early Reflections Level

Sets the volume of the initial wall reflections.
Range: 0% to 100%

Early/Late Reverb Bal

Adjusts the balance between early refections and late reverb. 
Range: 0% to 100%

Late Reverb Delay

Sets the time between early reflections and the onset of the late 
reverb cloud. Range: 1ms to 350ms

Diffusion

Sets the amount of scattering of the late reverb cloud.
Range: 0% to 100%

High Freq. Damping

Sets the rate at which high frequencies die away.
Range: -10.0 to +3.0 damping factor

Low Freq. Damping

Sets the rate at which low frequencies die away.
Range: -10.0 to +3.0 damping factor

Time