Kurzweil K2600 - Waveforms Combined with Nonlinear Functions

16-52
DSP Functions
The DSP Functions
The parameters on the PWM control-input page affect the DC offset of the signal, in terms of the
percentage of shift from no offset to maximum offset. At a value of 0%, there is an offset positive
full scale. At 100%, the offset is negative full scale, and at 50%, there is no offset.
A typical control conÞguration for PWM has the Coarse Adjust set to 50%, an LFO assigned to
Src1, and Src1Õs Depth parameter set to a value of 25%.
The page below shows the PWM function in the F1 block, but it can appear in other blocks as
well.
EditProg:F1|WID(PWM)|||||||<>Layer:1/1||
Adjust:50%||||||||||Src1||:LFO1|||||||||
||||||||||||||||||||Depth|:25%||||||||||
||||||||||||||||||||Src2||:OFF||||||||||
KeyTrk:|0.0%/key||||DptCtl:OFF||||||||||
VelTrk:0%|||||||||||MinDpt:0%|||||||||||
Pad|||:0dB||||||||||MaxDpt:0%|||||||||||
<more||F1|WID|F2|||||F3|||||F4|AMP|more>
Waveforms Combined with Nonlinear Functions
The six functions in this category do one of two things: they combine samples and waveforms
with a nonlinear DSP function, or they use a waveform or sample as inputs to drive nonlinear
functions.
Added Sawtooth Wave with Nonlinearity (SW+DST)
This function starts by adding a sawtooth wave to the layerÕs sample input. When the input
signal from the sample is added to the sawtooth, the signal may exceed full scale, so a
wraparound function similar to WRAP is performed. The result is then squared to remove any
discontinuities from the wraparound. The resulting signal has a large DC offset, so a constant of
3/8 is subtracted.
Parameter Range of Values
Adjust 0 to 100%
Key Tracking ± 8.00% per key
Velocity Tracking ± 100%
Pad 0, 6, 12, 18 dB
Source 1 Control Source list
Source 1 Depth ± 100%
Source 2 Control Source list
Source 2 Depth Control Control Source list
Minimum Depth, Source 2 ± 100%
Maximum Depth, Source 2 ± 100%
Added Sawtooth with Nonlinearity (SW+DST) x Shape Mod Osc
Added Sawtooth plus Shaper (SW+SHP) + Shape Mod Osc
Shape-modulated Oscillator Amp-modulated Oscillator