FXAlgs #4-11: Classic ¥ TQ ¥ Diffuse ¥ Omni reverbs
Algorithm Reference-19
Room Type
This parameter selects the basic type of reverb being emulated, and should be the
starting point when creating your own reverb presets. Due to the inherent complexity of
reverb algorithms and the sheer number of variables responsible for their character, the
Room Type parameter provides condensed preset collections of these variables. Each
Room Type preset has been painstakingly selected by Kurzweil engineers to provide the
best sounding collection of mutually complementary variables modeling an assortment
of reverb families. When a room type is selected, an entire incorporated set of delay
lengths and diffusion settings are established within the algorithm. By using the Size
Scale, DiffAmtScl, DiffLenScl, and Inj Spread parameters, you may scale individual
elements away from their preset value. When set to 1.00x, each of these elements is
accurately representing its preset value determined by the current Room Type.
Room Types with similar names in different reverb algorithms do not sound the same.
For example, Hall1 in Diffuse Verb does not sound the same as Hall1 in TQ Verb.
Size Scale
This parameter scales the inherent size of the reverb chosen by Room Type. For a true
representation of the selected Room Type size, set this to 1.00x. Scaling the size below
this will create smaller spaces, while larger scale factors will create large spaces.
InÞnDecay
Found in ÒVerbÓ algorithms. When turned ÒOnÓ, the reverb tail will decay indeÞnitely.
However, certain HF Damping settings may reduce this effect, and cause the tail to taper
away. When turned ÒOffÓ, the decay time is determined by the ÒRvrb TimeÓ or
ÒLateRvbTimÓ parameters. This parameter is an excellent candidate for a KDFX
Modulation, using a switch pedal as a source.
LF Split
Used in conjunction with LF Time. This controls the upper-frequency limit of the low-
frequency decay time multiplier. Energy below this frequency will decay faster or slower
depending on the LF Time parameter.
LF Time
Used in conjunction with LF Split. This modiÞes the decay time of the energy below the
LF Split frequency. A setting of 1.00x will make low-frequency energy decay at the rate
determined by the decay time. Higher values will cause low-frequency energy to decay
slower, and lower values will cause it to decay more quickly.
TrebShlf F
Adjusts the frequency of a high-shelving Þlter at the output of the late reverb.
TrebShlf G
Adjusts the gain of a high-shelving Þlter at the output of the late reverb.
BassShlf F
Adjusts the frequency of a low-shelving Þlter at the output of the late reverb.
BassShlf G
Adjusts the gain of a low-shelving Þlter at the output of the late reverb.
DiffAmtScl
Adjusts the amount of diffusion at the onset of the reverb. For a true representation of
the selected Room Type diffusion amount, set this to 1.00x.
DiffLenScl
Adjusts the length of the diffusion at the onset of the reverb. For a true representation of
the selected Room Type diffusion length, set this to 1.00x.
DiffExtent
Adjust the onset diffusion duration. Higher values create longer diffuse bursts at the
onset of the reverb.
Diff Cross
Adjusts the onset diffusion cross-coupling character. Although subtle, this parameter
bleeds left and right channels into each other during onset diffusion, and also in the
body of the reverb. 0% setting will disable this. Increasing this value in either the
positive or negative direction will increase its effect.
Expanse
Amount of late reverb energy biased toward the edges of the stereo image. A setting of
0% will bias energy towards the center. Moving away from 0% will bias energy towards
the sides. Positive and negative values will have a different character.
