Kurzweil K2661 Musician's Manual page 71

The five downward-pointing arrows indicate the five real-time control inputs to the DSP
functions. There are usually five inputs, each of which has its own page within the Program
Editor. (Algorithms 26-31, which use hard sync oscillation, have only four inputs; you can read
about hard sync functions on page 16-55.) Each of these pages has several parameters that can
modulate its related DSP function. Often a single DSP function will have more than one input.
That's why some blocks are larger, and have more than one arrow pointing to them. Each
function can be independently controlled by a variety of sources (the Control Source list),
including LFOs, ASRs, envelopes, programmable functions, and external MIDI.
In Algorithm 1, the signal flows first through a one-stage DSP function that controls the pitch of
the samples in the keymap. In fact, the first DSP function in each algorithm always controls pitch,
even though it doesn't apply in every instance. Similarly, the last DSP function always controls
the final amplitude of the signal. It can be a one-stage or two-stage function. In Algorithm 1, it's
a one-stage function.
The second, larger block indicates a single three-stage DSP function, meaning that it has three
control inputs that can be adjusted to modulate the signal.
Once again, you can't change the wiring path of an algorithm—you can simply select a different
algorithm to get a different path. And within each algorithm, you can assign a large number of
different DSP functions to each of the five control inputs. The diagram below, for example,
shows Algorithm 1 with all the possible values for each DSP function lined up under the blocks
that represent the DSP functions.
PITCH HIFREQ STIMULATOR
PARAMETRIC EQ
STEEP RESONANT BASS
4POLE LOPASS W/SEP
4POLE HIPASS W/SEP
TWIN PEAKS BANDPASS
DOUBLE NOTCH W/SEP
NONE
Figure 6-2 Algorithm Wiring
Notice that PITCH is the only value available for the first block, and AMP is the only value
available for the last block. The center, three-stage block, however, allows you to choose from
seven DSP functions. An eighth value, NONE, deactivates the block.
Program Mode and the Program Editor
Editing VAST Programs
AMP
6-13