Sequential PRO 3 - Page 37

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 lter type
To hear the effect of the lter:
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 lter.
3. Hold down a note and rotate the lter’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 lter 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 lter’s cutoff knob again and listen to the sound change as
a band of frequencies near the cutoff is amplied. This how to create a
classic resonant lter sweep.
In the previous example, you controlled the lter 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.