Filter Modulation - Korg Pa50 User Manual

Resonance modulation
The effect of resonance
Low Pass
Level
Low resonance value
AMS (Alternate Modulation Source)
Selects the source that will control the "Resonance" level. See
"AMS (Alternate Modulation Source) list" on page 123.
Intensity (AMS Intensity)
This parameter specifies the depth and direction of the effect
that "AMS (Alternate Modulation Source)" will have on the
resonance level specified by "Resonance A".
For example if Velocity has been selected, changes in key-
board velocity will affect the resonance.
With positive (+) values, the resonance will increase as you
play more strongly, and as you play more softly the resonance
will approach the level specified by the "Resonance" setting.
With negative (–) values, the resonance will decrease as you
play more strongly, and as you play more softly the resonance
will approach the level specified by the "Resonance" setting.
The resonance level is determined by adding the "Resonance"
and "Intensity (AMS Intensity)" values.
-99...+99 Parameter value.
Filter B
Frequency B (Cutoff Frequency B)
This parameter specifies the cutoff frequency of filter B. This
parameter will be displayed when "Filter Type" is set to Low
Pass & High Pass.
High Pass
Level
12dB/oct
Frequency
00...99 Cutoff frequency value.
PAGE 8 - FILTER MODULATION
These settings let you apply modulation to the cutoff fre-
quency ("Frequency") of the filter for the selected oscillator
to modify the tone.
Filter Mod |Osc1
Selected:
Tracking Low:
Tracking High:
Ramp Low:
When "Filter Type" is Low Pass Resonance, parameters for
filter B will not be editable (greyed out).
High resonance value
This filter cuts the low-frequency range that
lies below the cutoff frequency. By cutting
the lower overtones, it lightens the tone.
Osc1
B 3
F 5
+48
Program operating mode
Selected
Use this parameter to select an oscillator to put in edit. Alter-
natively, you can select oscillators using the F1-F4 buttons.
Filter keyboard tracking
Tracking Low/High
These settings specify keyboard tracking for the cutoff fre-
quency of the filter for the selected oscillator. The way in
which the cutoff frequency is affected by the keyboard loca-
tion you play can be specified by the "Tracking Low", "Track-
ing High", "Ramp Low" and "Ramp High" parameters.
C–1...G9 Lowest/Highest note in the range.
Tracking Low
Keyboard tracking will apply to the range below the specified
note number.
Tracking High
Keyboard tracking will apply to the range above the specified
note number.
Ramp
This parameter specifies the angle of keyboard tracking.
-99...+99 Angle value.
Here is how cutoff frequency is affected by keyboard location
and the Ramp setting ("Intensity to A" and "Intensity to B" =
+50):
Cutoff frequency
Low Ramp=+99
Low Ramp=+43
Low Ramp=0
Low Ramp=–62
Low Key
Low Ramp=–99
Ramp Low
Ramp High
If "Intensity to A" and "Intensity to B" are set to +50, "Ramp
Low" is set to –62 and "Ramp High" is set to +62, the angle of
the change in cutoff frequency will correspond to the key-
board location (pitch). This means that the oscillation that
occurs when you increase the "Resonance A" will correspond
to the keyboard location.
If you set "Ramp Low" to +43 and "Ramp High" to –43, the
cutoff frequency will not be affected by keyboard location.
Use this setting when you do not want the cutoff frequency to
change for each note.
Tracking to A/B
These parameters specify the note numbers at which key-
board tracking will begin to apply, and set the "Intensity to A"
and "Intensity to B" parameters to specify the depth and
direction of the change applied to filters A and B.
For the range of notes between "Key Low" and "Key High",
the cutoff frequency will change according to the keyboard
location (pitch).
-99...+99 Parameter value.
Page 8 - Filter Modulation
High Ramp=+99
High Ramp=+62
High Ramp=0
High Ramp=–43
High Ramp=–99
Key
High Key
113