Creative 0404 PCIe Manuel du propriétaire Page 60

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5 - Effects
Core Effects Descriptions
60 Creative Professional
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.
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 reflec-
tions) begins and decays according to the time set by the Decay Time parameter. The Rever-
berance 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.
Post Gain Amplifies the signal after it has been compressed to bring up the volume.
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%
Time
Early Reflections
Reverberation
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