Kurzweil PC3A7 [224/423] Pitcher

Effects and Effect Mode

Effects Overview

9-25

Pitcher

Pitcher applies a lter to the input signal which has a series of peaks in the frequency response.

These peaks are normally adjusted so that their frequencies are all multiples of a specic,

selectable frequency, which imposes a strong sense of pitch at the selected fundamental

frequency.

Pitch. The fundamental pitch imposed upon the input, in MIDI note numbers from C-1 to G9.

Ptch Ost is an oset from the pitch frequency in semitones, from -12.0 to 12.0. It can be useful to

assign pitch bend, a ribbon, or another continuous controller to this parameter through a MOD.

Odd Wts, Pair Wts, Quartr Wts, Half Wts are parameters that control the shape of the frequency

response of Pitcher. An exact description of what each one does is, unfortunately, impossible,

since there is a great deal of interaction between them. For more information and examples, see

the KSP8 Algorithm Reference Guide available as a free download at www.kurzweil.com.

Ring Modulation

Ring modulation multiplies two signals (the “carrier” and the “modulator”) together to produce

unusual, often non-harmonic, overtones. The Ring Modulator eect in the PC3A has two modes:

“L*R” in which two mono signals are modulated together; and “Osc”, in which the input is

stereo, and it is modulated with the sum of ve waveforms that are generated from oscillators

within the eect itself. Four of these oscillators are sine waves, while one (Oscillator 1) oers a

selection of waveforms.

Wet/Dry. When the eect is in “L*R” mode, this controls how much of the left signal only is

passed dry (the right signal isn’t passed dry at all).

Mod Mode selects between the two modes.

Osc1 Lvl is the level of Oscillator 1, from 0 to 100%.

Osc1 Freq is the frequency of Oscillator 1, from 16 to 25088 Hz.

Osc1 Shape is the waveshape of Oscillator 1, selectable from Sine, Saw+, Saw-, Pulse, and Tri.

Osc1PlsWid (Pulse Width). When Osc1 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 eect if other waveform types are chosen. Range is 0 to 100%.

Osc1Smooth smooths (removes the higher harmonics from) the Saw+, Saw-, and Pulse

waveforms. A Sawtooth wave becomes more like a triangle wave, and a Pulse wave becomes

more like a sine wave. Range is 0 to 100%.

The other four oscillators, Sine2 through Sine5, each have Lvl and Freq controls.

Stereo Simulation

The Mono to Stereo eect converts a monaural input to simulated stereo output.

In Select selects the input signal to be “stereo-ized”. It can be Left, Right, or both: (L+R)/2.

CenterGain is the level of the summed left and right channels. Range is O/-79.0 to 24.0 dB.

Di Gain is the level of the dierence signal produced, which is the spatial component of the

stereo signal. Range is O/-79.0 to 24.0 dB.