Kurzweil Flash Play PC4 - Setting KVA Oscillator Type

Program Edit Mode
Editing VAST Programs With KVA Oscillators
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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 DSP CTL 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 DSP CTL
and DSP MOD 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 PC4 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 on page 3-49
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.
Note: If you put more than one oscillator in an algorithm, you will only hear the output of
the last oscillator in the algorithm, unless an algorithm is used to route the earlier oscillator
around the last oscillator and into a MIX function block, or if the last oscillator processes its
audio input.