Sequential PRO 3, User Manual

Page: 37 / 168

25 Pro 3 User’s Guide Filters
CUTOFF
DRIVE
BP
LP
NOTCH
LOW-PASS 1 LOW-PASS 2 STATE-VARIABLE
4-Pole OTA 4-Pole Ladder 2-Pole OTA
HP
RESONANCE
STATE
FILTER
Press one of these buttons to select the filter type
To hear the effect of the filter:
1. Recall the Basic Program by pressing the
global
button and using Soft
Knob 1 to navigate to the
basic program
command, then press Soft
Button 1 (
write now
).
2. Press the
low
-
pass
1
button to select this filter.
3. Hold down a note and rotate the filter’s
cutoff
knob. Notice how it cuts
the high frequencies as you rotate counter-clockwise, making the sound
of the oscillator less bright. If you turn the
cutoff
knob fully counter-
clockwise you’ll filter out all frequencies and hear nothing.
4. Return the
cutoff
knob to its halfway position, hold down a note again
then turn the
resonance
knob about halfway up.
5. Rotate the filter’s
cutoff
knob again and listen to the sound change as
a band of frequencies near the cutoff is amplified. This how to create a
classic resonant filter sweep.
In the previous example, you controlled the filter cutoff by hand. In most
cases, you will use the Filter Envelope to do this. To learn more about the
Filter Envelope see page 31.