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MBOX Control Software Overview
31
REVERB Controls
AVID FX Reverb
Item Description
Bypass Disables the effect
Size
In conjunction with the Room (Algorithm) control, adjusts the overall size of the reverberant space. There are three
sizes: Small, Medium, and Large. The character of the reverberation changes with each of these settings (as does the
relative value of the Decay setting). Size can be used to vary the range of a reverb from large to small. Generally, you
should select an algorithm first, and then choose the size that approximates the size of the acoustic space that you
are trying to create.
Room (Algorithm)
Selects one of seven reverb algorithms: Hall, Church, Plate, Room 1, Room 2, Ambience, or Non-linear. Selecting an
algorithm changes the preset provided for it. Switching the Size setting changes characteristics of the algorithm that
are not altered by adjusting the decay time and other user-adjustable controls. Each of the seven algorithms has a dis-
tinctly different character.
Decay
Controls the rate at which the reverb decays after the original direct signal stops. The value of the Decay setting is
affected by the Size and Algorithm controls.
HF Cut
Controls the decay characteristic of the high frequency components of the reverb. It acts in conjunction with the Low
Pass Filter control to create the overall high frequency contour of the reverb. When set relatively low, high frequencies
decay more quickly than low frequencies, simulating the effect of air absorption in a hall. The maximum value of this
control is Off (which effectively means bypass).
Diffusion
Sets the degree to which initial echo density increases over time. High settings result in high initial build-up of echo
density. Low settings cause low initial buildup. This control interacts with the Size and Decay controls to affect the
overall reverb density. High settings of diffusion can be used to enhance percussion. Use low or moderate settings for
clearer and more natural-sounding vocals and mixes.
Pre-Delay
Determines the amount of time that elapses between the original audio event and the onset of reverberation. Under
natural conditions, the amount of pre-delay depends on the size and construction of the acoustic space, and the rel-
ative position of the sound source and the listener. Pre-Delay attempts to duplicate this phenomenon and is used to
create a sense of distance and volume within an acoustic space. Long Pre-Delay settings place the reverberant field
behind rather than on top of the original audio signal.
LPF
Controls the overall high frequency content of the reverb by setting the frequency above which a 6 dB per octave filter
attenuates the processed signal. The maximum value of this control is Off (which effectively means bypass).
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