User Manual

Program Edit Mode
Editing VAST Programs With KVA Oscillators
7-73
Read the Setting KVA Oscillator Type section below to learn about how to set each type of
oscillator. After doing this, you can experiment with making KVA programs by following the
above settings, and then setting and listening to each type of oscillator. Once you understand
how to do this, read on to the Advanced Use Of KVA Oscillators (see below) to learn how to
make your KVA patches more expressive through the use of DSP modulation.
Pitch Settings for KVA Oscillators
Each oscillator (except for noise functions) has its own pitch parameters, and is unaected by
pitch settings that would normally aect keymaps (such as those on the Keymap page). On a
program layer, the coarse pitch parameter for the oscillator in use can be found on both the
DSPCTL and DSPMOD pages, in the parameters list below the standard Pitch parameter
for keymaps. For each oscillator, its coarse pitch parameter is named by an abbreviation
of the oscillator name followed by “Pch.” For example, the coarse pitch parameter for a
saw wave oscillator will be called Saw Pch. On the DSPCTL sub page for any oscillator
Pch. parameter, you can adjust ne pitch by cents and Hertz, as well as KeyTrk and VelTrk
settings for pitch.
Note: Be sure to dierentiate between the dierent pitch parameters, each used either
only for keymaps or only for KVA oscillators. e Pitch parameter on the top left
of the DSPCTL and DSPMOD pages always appears in VAST programs but only
aects the pitch of keymaps. If a KVA oscillator is being used, this Pitch parameter
will have no aect on the layer’s pitch, in which case the oscillator Pch. parameter
described above must be used to control the pitch of the oscillator.
Setting KVA Oscillator Type
e Forte comes with 22 Dierent KVA oscillators. ere are 11 high quality anti-aliased
oscillators (free of digital artifacts) and 11 oscillators that exhibit some aliasing (digital
artifacts) in the higher octaves. e anti-aliased oscillators use up more DSP resources than
the ones with aliasing, but the improvement in sound quality is quite noticeable. We strongly
recommend using the anti-aliased oscillators for most applications.
e tables below list KVA oscillators by type and function block size. Before setting an
oscillator, you must choose an algorithm which includes a block that matches the block size
for the oscillator that you wish to use. See The Wiring Algorithm (ALG) Page and Algorithm
Basics on page 7-34 for more on selecting algorithms. Once you have picked an algorithm
with the desired block size, highlight the block and use the Alpha Wheel to scroll through
the available functions until you nd the desired oscillator.
e SYNC SQUARE oscillator is an 8 block oscillator that requires the use of two layers (4
blocks each) and the Alt Input feature of cascade mode. See below for details on setting up
the Sync Square oscillator.