Kurzweil PC3A, Руководство пользователя

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Program Mode
Function Soft Buttons
6-57
Oscillator Specific Control And Modulation Parameters:
Several KVA oscillators also have their own modulation parameters that must be accessed to
control the oscillator’s intended function. Below is a list of these oscillators and their distinctive
parameters, grouped by block size. Though the following parameters could be left at one setting,
utilizing one of the DSPCTL or DSPMOD techniques described in the above examples will
expose a wider range of expression from each oscillator.
1 Block:
LPNOIZ
A noise generator combined with a low pass filter. Use the Noiz Frq parameter to control the cut
off frequency of the filter.
NOISE
A simple noise generator. Use the Noise parameter to control the noise initial amplitude.
SW + SHP (Sa Shaper)
This oscillator is capable of basic FM Synthesis. Its distinctive parameter is Pch Coar. This
oscillator must come after the sound source in an algorithm (either keymap or oscillator) in order
to hear the effect of Pch Coar, which can radically change whatever the oscillator receives as an
input. Works well placed after a Sine source.
SINE+ [Aliased (not recommended)]
Same as 2 block version, but without the Sine+Am parameter.
SAW+ [Aliased (not recommended)]
A saw oscillator that can add an input signal to its output.
NOISE+ [Aliased (not recommended)]
A noise oscillator that can add an input signal to its output.
2 Block:
SINE+
A sine oscillator that can add an input signal to its output. The Sin+ Pch and Sine+ Am
parameters affect the pitch and amplitude of the sine waveform without affecting the pitch of the
input source.
RES NOISE
A noise generator combined with a low pass filter with resonance control. Use the Noiz Frq
parameter to control the cut off frequency of the filter. Use the Noiz Q parameter to control the
amplitude of the resonance (a boost or cut at the cut off frequency.) One technique for use of this
function is to set a high value for Noiz Q (so that you hear a the resonance create a tone,) and then
on the DSPCTL page set C4 as an initial frequency for Noiz Frq, and set Keytrk to 100ct/key on
the Noiz Frq sub page. Doing this causes the noise resonance frequency to match the note of the
key played.
SHAPED SAW
The Shaped Saw oscillator is a sawtooth oscillator with the ability to morph its output shape
between sawtooth and sine wave (without crossfading.) This oscillator’s distinctive parameter is
Shape, which controls the morphing. With Shape set to 0, the oscillator produces a pure sawtooth
wave. With Shape set to 127, the oscillator produces a pure sine wave. Values in between morph
between the two wave shapes.
PWM (Pulse Width Modulation) [Aliased (not recommended)]
This oscillator’s distinctive parameter is PWM Wid, which adjusts pulse width from values of
1-99 . With PWM Wid set to a value of 50, PWM produces a square wave. The further the PWM
Wid parameter is set from 50, the narrower the pulse width becomes, changing the shape of the
output waveform and thus altering the oscillator’s tonal quality.