Oberheim Matrix-12 User Manual

Combination Modes
2 HIGH + 1 LOW
3 HIGH + 1 LOW
2 NOTCH + 1 LOW
3 PHASE + 1 LOW
Four types of exotic or special-purpose filtering is provided
in these last four VCF modes. The combined filtering effects
of the primary Modes used in these Filters are used to obtain
tonal results not possible with conventional analog Filter
modes. Some experimentation to determine the usefulness
of these Modes in a particular Patch may be required.
MORE ABOUT FILTER POLES
The number of poles of a Filter Mode means "how sharply the Filter cuts off the
harmonics". This, in technical terms, indicates its "rolloff characteristics" or the rate
in which the harmonics are attenuated. In other words, polarity determines the
rate in which the volume of the harmonics is reduced.
The attenuation of harmonics for the term POLE is expressed in dB (decibels) per
Octave. The VCF begins to cut off harmonics at the point set by the FREQ
control. In the MATRIX-12, each Pole of the VCF attenuates frequencies beyond
the Filter Point at a rate of 6dB/Octave.
FREQUENCY
More Poles = Sharper Filter Cutoff
Comparative filtering effects of the four low pass filters.
Adding RESONANCE boosts the amplitude at the initial cutoff point.
114 Matrix-12 Owner's Manual

Oberheim Matrix-12 Specifications

General

Brand	Oberheim
Model	Matrix-12
Category	Synthesizer
Language	English