5 - Effects

Core Effects Descriptions

Lite Reverb

Reverberation is a simulation of a natural space such as a room or hall. The Lite Reverb algorithm is designed to simulate various rooms and reverberation plates while using fewer DSP resources than the Stereo Reverb. Up to five Lite Reverbs can be used at once.

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.

Early Reflections

ReverberationTime

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, the actual Reverberation (a dense cloud of complex wall reflections) begins and decays according to the time set by the Decay Time parameter. The Reverberance parameter controls the density and smearing of both the early reflections and the reverberation cloud.

High frequency energy tends to fade away first as a sound is dissipated in a room. The High Frequency Decay Factor 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 Decay Factor parameter adjusts the time it takes for the low frequencies to die away. This control adjusts the “boominess” of the room.

Parameter

Description

 

 

Decay Time

Sets the reverb decay time. Range: 0% to 100%

 

 

HF Decay Factor

Sets the rate at which high frequencies die away. The high

 

frequencies last longer as the percentage is increased.

 

Range: 0% to 100%

 

 

LF Decay Factor

Sets the rate at which low frequencies die away. The low

 

frequencies last longer as the percentage is increased.

 

Range: 0% to 100%

 

 

Early Reflections

Sets the volume of the initial wall reflections.

 

Range: 0% to 100%

 

 

Reverberance

Sets the amount of scattering of the early reflections and

 

the reverberation cloud. Range: 0% to 100%

 

 

E-MU Digital Audio System

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Creative 0404 owner manual Lite Reverb, Early Reflections ReverberationTime

0404 specifications

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