Oberheim Matrix-12 User Manual

FMDEST
With a small FM amount, the overtones generated will be the
frequencies of VCO2 and VCO1 or the VCF (when flES is at
maximum), plus the sum and difference of their frequencies.
Increasing the amount (VALUE X) will cause other overtones
to be generated as well. Changing the amount changes the
volume and number of the overtones, similar to conventional
filtering.
MF.M. Destination" As mentioned previously, this
parameter permits the selection of the destination of the
MATRIX-12fs FM generator to be either VCO1 or the VCF.
Turning Knob #2 back and forth selects betwen VCO1 or
VCF. Also, pressing the button above this knob repeatedly
toggles between VCO1 and the VCF. Either VCO1 or the
VCF can be selected, but not at the same time.
FM Experiment
The FM Generator is actually theMATRIX-12fs "28th" Source of Modulation. But
due to its unique design (utilizing a VCO for its waveform and frequency) and
specialized use as a Modulator (it can only affect VCO1 or the VCF), it is given its
own Page and is not used in the MATRIX-12's Matrix Modulation.
To experiment with FM in its simplest form, do the following:
STEP 1: Select a SINGLE Patch that you want to work with. Or for the easiest
way to hear FM, press and hold STORE. Then while holding STORE,
press the CLEAR button. This action recalls the MATRIX-12's Basic
Patch - called "OBERHEIM" - from permanent memory.
This is called the "Patch Initializing" function and is described in
the PROGRAMMER section of the manual. We will need
to use the MATRIX-12fS Basic Patch for this experiment.
STEP 2: Select VCO2. Press PAGE 2. Turn its waveform outputs OFF in the
Lower Display. VCO 2fs Triangle wave is patched separately for FM
so we don't want interference from its audio waves.
STEP 3: Select VCO1. Enter Page 2. Turn ON any one of its waveform outputs
in the Lower Display. Using a SA W wave will enable us to hear the
effects of FM the best.
STEP 4: Select the FM/LAG Page. The Lower Display will permit you to select
either VC01 of the VCF as the FM DEST (the FM destination). For
our experiment, we'll use VC01.
STEP 5: Gradually increase the FM AMP (the Amount of FM) while you are
playing notes on the keyboard. What you will hear will be the new
harmonics generated by the FM process.
For FM routing to the VCF, select the VCF/VCA Page and turn the RES
(Resonance) parameter Amount to 63 and select 2 POLE LOW as the Filter
MODE. By so doing, the VCF will be in oscillation which is the the point where FM
is best heard.
118 Matrix-12 Owner's Manual

Oberheim Matrix-12 Specifications

General

Brand	Oberheim
Model	Matrix-12
Category	Synthesizer
Language	English