9-20
Effects
Rotating Speakers
Cab Preset selects from eight cabinet simulations which have been created based on
measurements of real guitar amplifier cabinets. The presets are: Basic, Lead 12, 2x12, Open 12,
Open 10, 4x12, Hot 2x12, and Hot 12.
Cab Bypass switches on and off the cabinet-simulation part of the algorithm. When this is set to
“In”, the cabinet simulation is active; when it is “Out”, there is no cabinet action.
Cabinet HP and Cabinet LP are highpass and lowpass filters to set the frequency response
limits of the cabinets. Range of both filters is 16 to 25088 Hz.
Polydistort
This is a more complex distortion algorithm that provides two, four, or six stages of distortion.
Curve n controls the curvature of the individual distortion stages. 0% is no curvature (no
distortion at all). At 100%, the curve bends over smoothly and becomes perfectly flat right before
it goes into clipping. Maximum value is 127%.
LP n Freq are shelving frequencies for one-pole lowpass filters on each of the distortion stages.
LP0 Freq handles the initial low pass prior to the first distortion stage. The other low pass
controls follow their respective distortion stages. Range is 16 to 25088 Hz.
Rotating Speakers
An algorithm that includes Rotating Speakers breaks the signal into two frequency bands,
“rotates” each band separately through a virtual speaker, and then combines the outputs with a
pair of virtual “microphones” whose angle relative to the speakers is adjustable. A number of
very sophisticated parameters have been included in the Rotating Speakers algorithm, to give
the effect a great degree of realism. Because of the complexity of the algorithms, you might want
to approach any parameters that seem a little obscure to you with caution.
Roto InOut engages or bypasses the rotary speaker effect.
There are four virtual microphones, with two each on the woofer (LoMic A and LoMic B) and
on the tweeter (HiMic A and HiMic B). Each microphone has:
Pos (position), the angle of the microphone from the front of the virtual speaker, from -180 to 180
degrees;
Lvl (level) from 0 to 100%; and
Pan, the left/right panning of the microphone’s output, from -100% (full left) to 100% (full
right).
Other parameters:
Lo Beam W and Hi Beam W set the acoustic radiation patterns (“beam width”) of the two
drivers in the rotating speaker. If you imagine looking down on the rotating speaker, this is the
angle between the -6 dB levels of the beam. The range is from 45° to 360°. At 360°, the driver is
omnidirectional.
Xover (Crossover) is the frequency at which high and low frequency bands are split and sent to
separate rotating drivers. The range is 16 to 25088 Hz.
Lo Gain and Hi Gain are the gains of the signal passing through the rotating woofer or tweeter,
respectively. The range is Off/-79.0 to 24.0 dB.
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