E-Mu ProteusX, Operation Manual

Page: 115 / 188

7 - Effects
Effects Listing
E-MU Systems 115
Effects Listing
Effects Descriptions
Background: Reverb
This information applies to all the reverb algorithms.
Reverberation is a simulation of a natural space such as a room or hall.
Pre-delay is the
time before the reflections from the closest walls are heard. This parameter gives our ears
important clues about the size of a room. As you might imagine, large halls have a
longer pre-delay than small rooms.
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. The
pattern of 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 parameter.
Diffusion is the amount of scattering and density of the 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.
Reverb Delay (mono) Ring Modulator
Early Reflections Reverb Flanger SP12-ulator
Reverb Lite (mono) Phaser Growl
Chorus Early Reflections Tube
Chorus / Delay (mono) EQ - 1Band Parametric Twin (mono)
Delay EQ - 4 Band
Delay (BPM) Pitch Shifter (mono)
Time
Early Reflections
Pre-Delay
Initial Sound
Reverberation