Distortion - Kurzweil K2661 Musician's Manual

Advanced KDFX
Using the Algorithms
Retrigger is the input-signal threshold at which the envelope detector resets, so that it can
trigger again. This parameter is only useful when it is set below the value of Trigger. Range is
from -79 to 0 dB.
Env Rate is the envelope detector decay rate. This can be used to prevent false triggering. When
the signal envelope falls below the retrigger level, the filter can be triggered again when the
signal rises above the trigger level. Since the input signal can fluctuate rapidly, it is necessary to
adjust the rate at which the signal envelope can fall to the retrigger level. The range is 0 to
300.0 dB/sec.
Rel Rate is the downward slew (release) rate of the triggered envelope generator. The range is 0
to 300.0 dB/sec.
Smth Rate slows down the envelope follower. If set lower than the release rate, it will dominate
it. You can also use the smoothing rate to lengthen the attack of the internal envelope. The range
is 0 to 300.0 dB/sec.
LFO Filter
The LFO filter is continuously swept between two resonant frequencies over a period of time.
The LFO frequency, expressed in BPM and beats, can be fixed or set to follow System tempo.
(See Tempo-based Parameters on page 15-25for more information about tempo control of KDFX
parameters.)
Min Freq and Max Freq are the low and high limits of the resonant frequency as the filter is
swept. It actually doesn't matter which is higher; the effect will be the same. The range for both
is 58 to 8372 Hz.
LFO Shape is the waveform type for the LFO. Choices are Sine, Saw+, Saw-, Pulse, and Tri.
LFO PlsWid (Pulse Width). When the LFO Shape is set to Pulse, this sets the pulse width as a
percentage of the waveform period. When the width is set to 50%, the result is a square wave.
This parameter has no effect if other waveform types are chosen. Range is 0 to 100%.
LFO Smooth smooths (removes the higher harmonics from) the Saw+, Saw-, and Pulse
waveforms. A Sawtooth wave looks more like a triangle wave, and a Pulse wave looks more like
a sine wave. Range is 0 to 100%.

Distortion

Distortion algorithms on KDFX may include a parametric equalizer or a cabinet simulator.
Dist Drive applies a boost to the input signal to overdrive the distortion algorithm into soft
clipping. Since distortion drive will make your signal very loud, you may have to reduce the
Out Gain as the drive is increased. Range is 0 to 96 dB.
Warmth is a lowpass filter in the distortion control path. This filter may be used to reduce some
of the harshness of some distortion settings without reducing the bandwidth of the signal.
Range is 16 to 25088 Hz.
Highpass allows you to reduce the bass content of the distortion content in the smaller
distortion algorithms that don't have true parametric EQ. Range is 16 to 25088 Hz.
Cab Preset selects from eight cabinet simulations which have been created based on
measurements of real guitar amplifier cabinets. The presets are: Plain, 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 filtering.
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