Oberheim TEO-5 - Filter Parameters

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TEO-5 User’s Guide
Global Settings
To hear the effect of the lter:
1. Recall the Basic Program by pressing the global button and using the
select knob to navigate to the basic program command, then press
write.
2. Hold down a note and rotate the lter’s cutoff knob. By default, it’s
set to the low pass state. 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 counterclockwise you’ll lter out all
frequencies and hear nothing.
3. Return the cutoff knob to its halfway position, hold down a note again
then turn the resonance knob about halfway up.
4. 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 is how to create a
classic resonant lter sweep.
5. Now try rotating the state knob, and listen to the timbral change as the
lter state shifts from low pass to notch to high pass and back.
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 “About the Filter Envelope” on page 25.
Filter Parameters
Cutoff: Sets the lter’s cutoff frequency, or the point at which the lter
begins removing harmonic content from the audio signal.
Resonance: Emphasizes a narrow band of frequencies around the cutoff
frequency.
State: Smoothly mixes between low pass, notch, and high pass lter
states. If the band pass state is set active in the Program menu, it replaces
notch at the center position of the state knob. When band pass is
selected, the bp LED on the front panel will light to indicate its selection.
Osc 1: Toggles Oscillator 1’s output to the input of the lter.
Sub: Toggles the sub oscillator’s output, which is generated from Osc 1.
Osc 2: Toggles Osc 2’s output.