Proteus 1000 Operation Manual 79
Programming Basics
Signal Flow
Signal Flow Going back to the Signal Path diagram for a single channel we can
reexamine the complete signal path.
Instrument
This is the sampled sound wave. The pitch of the instrument can be
modulated by any modulation source. The sample start point can be
changed only at the time the note is played.
Z-Plane Filter
The Z-Plane Filter is used to shape the harmonic content of an instrument.
The filter envelope is commonly used to shape the harmonic content
dynamically over time but the filter frequency can be modulated by any
source. The Q parameter can be modulated only at note-on time. There are
50 types of filters available. See “Proteus 1000 Filter Types” on page 105 for
a complete list of the filters.
Digitally Controlled Amplifier (DCA)
Together with the Volume Envelope, the DCA is used to shape the volume
contour of a sound. The DCA can be controlled by any modulation source.
Velocity is often used as a modulation source for the DCA so that the harder
you play, the louder the sound becomes.
Pan
Adjusts the balance of sound to the left and right channels. Pan can be
modulated by any modulation source.
R
L
Volume
Pan
Volume
Envelope
Instrument
Pitch
Sample
Start
Z-Plane
Filter
DCA
Filter
Envelope
Velocity
Freq Q
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