Chapter 7: Preset Programming 93
PRESET PROGRAMMING
MORPHEUS SIGNAL FLOW
Going back to the block diagram for a single channel we can re-exam-
ine 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 only be modulated by a velocity or key source (see the next
page).
Tone
Tone is a simple low-pass tone control which can be used to
darken the sound. Tone can only be set at Note-On time (see the
next page). Key velocity is commonly used to modulate the tone
(in a negative way) so that the harder you play, the brighter the
sound becomes.
Z-Plane Filter
The Z-Plane Filter controls the harmonic content of an instru-
ment in a highly controlled manner. Any modulation source can
be used to control the various aspects of this complex filter.
DCA
Digitally Controlled Amplifier. Together with the Alternate
Volume AHDSR, the DCA is used to shape the volume contour of
a sound. The DCA can be controlled by any modulation source.
Key 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 between the left and right channels.
R
L
Volume
Pan
Volume
AHDSR
Instrument
Pitch
Sample
Start
Tone
Z-Plane Filter
DCA
Aux.
DAHDSR
Velocity
Key
Position
Morph
Freq
Trk
Function
Gen.
Possible
Modulation
Sources
Trans
2
The vertical arrows represent possible modulation routings to the basic signal path.
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