6.0

32
The included VST instruments
OSC 3 parameters
Oscillator 3 has the following parameters:
About frequency modulation
Frequency modulation or FM means that the frequency of
one oscillator (called the carrier) is modulated by the fre-
quency of another oscillator (called the modulator).
• In Prologue, Osc 1 is the modulator, and Osc 2 and 3
are carriers.
Osc 2 could be said to be both carrier and modulator as if Freq Mod is
applied to Osc 2 it is modulated by Osc 3. If Osc 2 also uses frequency
modulation, Osc 3 is modulated by both Osc 1 and Osc 2.
• The “pure” sound of frequency modulation is output
through the modulator oscillator(s).
This means that you should turn off the Osc 1 output when using fre-
quency modulation.
• The Freq Mod button switches frequency modulation on
or off.
• The Ratio parameter determines the amount of frequency
modulation.
Portamento
This parameter makes the pitch glide between the notes
you play. The parameter setting determines the time it
takes for the pitch to glide from one note to the next. Turn
the knob clockwise for longer glide time.
The “Mode” switch allows you to apply glide only when
you play a legato note (when switch is set to Legato). Le
-
gato is when you play a note without releasing the previ-
ously played note. Note that Legato mode only works with
monophonic parts.
Ratio
(1–16)
This parameter (which is only active if the Freq Mod button
is activated) adjusts the amount of frequency modulation
applied to oscillator 2, see
“About frequency modulation”
on page 32. Is normally referred to as FM index.
Sync button
(On/Off)
When Sync is activated, Osc 2 is slaved to Osc 1. This
means that every time Osc 1 completes its cycle, Osc 2 is
forced to reset (start its cycle from the beginning). This
produces a characteristic sound, suitable for lead playing.
Osc 1 determines the pitch, and varying the pitch of Osc 2
produces changes in timbre. For classic sync sounds, try
modulating the pitch of Osc 2 with an envelope or an LFO.
The Osc 2 pitch should also be set higher than the pitch of
Osc 1.
Tracking
button
(On/Off)
When Tracking is activated, the oscillator pitch tracks the
notes played on the keyboard. If Tracking is deactivated,
the oscillator pitch remains constant, regardless of what
note is played.
Freq Mod
button
(On/Off)
This switches frequency modulation on or off.
Wave Mod
button
(On/Off)
This switches wave modulation on or off.
Waveform
pop-up menu
(see “Selecting
Waveforms”
on page 30)
Sets the basic waveform for the oscillator.
Parameter Description
Osc 3
(0–100)
This controls the output level of the oscillator.
Coarse
(±48
semitones)
This determines the coarse pitch for Osc 3. If FM is en-
abled, this determines the frequency ratio of the oscillator
regarding Osc 1/2.
Fine
(±50 cent)
Fine tunes the oscillator pitch in cent increments (100th
of a semitone). If FM is enabled, this determines the fre
-
quency ratio of the oscillator regarding Osc 1/2.
Ratio
(1–16)
This parameter (which is only active if the Freq Mod button
is activated) adjusts the amount of frequency modulation
applied to oscillator 3, see
“About frequency modulation”
on page 32. Is normally referred to as FM index.
Sync button
(On/Off)
When Sync is activated, Osc 3 is slaved to Osc 1. This
means that every time Osc 1 completes its cycle, Osc 3 is
forced to reset (start its cycle from the beginning). This
produces a characteristic sound, suitable for lead playing.
Osc 1 determines the pitch, and varying the pitch of Osc 3
produces changes in timbre. For classic sync sounds, try
modulating the pitch of Osc 3 with an envelope or an LFO.
The Osc 3 pitch should also be set higher than the pitch of
Osc 1.
Parameter Description
Tracking
button
(On/Off)
When Tracking is activated, the oscillator pitch tracks the
notes played on the keyboard. If Tracking is deactivated,
the oscillator pitch remains constant, regardless of what
note is played.
Freq Mod
button
(On/Off)
This switches frequency modulation on or off.
Wave Mod
button
(On/Off)
This switches wave modulation on or off.
Waveform
pop-up menu
(see “Selecting
Waveforms”
on page 30)
Sets the basic waveform for the oscillator.
Parameter Description