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Stereo Reverb<br />
Reverberation is a simulation of a natural space such as a room or hall. The stereo reverb<br />
algorithm is designed to simulate various halls, rooms and reverberation plates.<br />
Decay time defines the time it takes for the reflected sound from the room to decay or<br />
die away. The diagram below shows a generalized reverberation envelope.<br />
Early Reflections<br />
Late Reverb<br />
After a short pre-delay period, the echoes from the closest walls or ceiling are heard.<br />
These first echoes, or early reflections, vary greatly depending on the type of room. Some<br />
time after the early reflection cluster ends (late reverb delay), the late reverberation (a<br />
dense cloud of complex wall reflections) begins and decays according to the time set by<br />
the Decay Time parameter.<br />
Diffusion is the amount of scattering and density of the late reverberation cloud. Rooms<br />
with many complex surfaces have more diffusion than bare rooms.<br />
High frequency energy tends to fade away first as a sound is dissipated in a room. The<br />
High Frequency Damping parameter adjusts the time it takes for the high frequency<br />
energy to die away and thus changes the characteristics of the room. Rooms with<br />
smooth, hard surfaces are more reflective and have less high frequency damping. Rooms<br />
filled with sound absorbing materials, such as curtains or people, have more high<br />
frequency damping.<br />
The Low Frequency Damping parameter adjusts the time it takes for the low frequencies<br />
to die away. This control adjusts the “boominess” of the room.<br />
Parameter Description<br />
Decay Time Sets the length of the Late Reverb from 1.5 to 30 seconds.<br />
Early Reflections Level Sets the volume of the initial wall reflections.<br />
Early/Late Reverb Bal Adjusts the balance between early refections and late<br />
reverb.<br />
Late Reverb Delay Sets the time between early reflections and the onset of<br />
the late reverb cloud.<br />
Diffusion Sets the amount of scattering of the late reverb cloud.<br />
High Freq. Damping Sets the rate at which high frequencies die away.<br />
Low Freq. Damping Sets the rate at which low frequencies die away.<br />
5 - Effects<br />
Core Effects Descriptions<br />
E-MU Digital Audio System 51<br />
Time
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