Kurzweil PC3A6 [21/423] Vast synthesis

Introduction

VA-1 Programs

1-3

VAST Synthesis

The PC3A’s Variable Architecture Synthesis Technology (V.A.S.T.) lets you build sounds from

realistic instrumental samples and sampled synth waveforms—then modify the nature of those

sounds through a wide variety of digital signal-processing (DSP) functions. The PC3A also

generates its own synth waveforms, which can be combined with the samples or used on their

own.

While many other synthesizers may oer a xed set of DSP tools (typically ltering, pitch, and

amplitude modulation) the PC3A’s Variable Architecture lets you arrange a combination of DSP

functions from a long list of choices. The functions you choose dene the type of synthesis you

use.

Each layer of every program has its own DSP architecture, which we call an algorithm. Within

each algorithm, you can select from a variety of DSP functions. Each function can be

independently controlled by a variety of sources including LFOs, ASRs, envelopes, a set of

unique programmable functions (FUNs), as well as any MIDI control message. The many

dierent DSP functions and the wealth of independent control sources give you an extremely

exible, truly vast collection of tools for sound creation and modication.

The PC3A oers powerful editing features we call Dynamic V.A.S.T. and Cascade Mode.

Dynamic V.A.S.T. allows you to “wire” your own algorithms, combining dierent DSP functions

in any order you like, including parallel and serial congurations.

Cascade Mode lets you route any layer of a program into the DSP of any other layer. Any of the 32

layers of a program can go into any other layer.

When you’re ready to jump in and start creating programs, turn to Chapter 6.

KB3 Tone Wheel Emulation

In addition to VAST synthesis, the PC3A oers many oscillator-based programs that give you the

classic sound of tone-wheel organs like the Hammond B3. KB3 mode, as we call it, is completely

independent of VAST, and has its own set of editing procedures. Nine dedicated sliders on the

PC3A’s front panel give you real-time drawbar control over these organ sounds. Buttons above

the sliders control rotating speaker speed, percussion, and other organ features.

The quickest way to get to the KB3 programs is by pressing the KB3 button (above the sliders, to

the left of the screen). The blue LED in the KB3 button will light when the current program is a

KB3 program.

VA-1 Programs

The VA-1 (Virtual Analog Synthesizer) programs included with the PC3A oer realistic

emulations of classic analog synthesizers, built from Kurzweil’s unique anti-aliased DSP-

generated oscillators. The PC3A’s power-shaped oscillators let you transition smoothly from one

waveform into another in real time, without using cross-fades.

VA-1 programs are scattered throughout the PC3A. Look for them in the Synth Category and the

Classic Keys Bank. You’ll see “KVA Oscillator” appear in the Keymap screen on the left hand side

of the display.