causing the VCF to oscillate. The VCF then becomes the second
"oscillator''. To experiment with FM in its simplest form, do the following:
STEP
1 :
Perform the PATCH INITIALIZE function as described
later in the MASTER EDIT
I
MISC. section of the manual.
We will need to use the MATRIX-6R's Basic Patch for this
experiment.
STEP
2 :
Enter PATCH EDIT
I
PARAM ETER mode.
STEP
3:
Select DC01 "06 WAVE SELECT".
STEP
4:
Enter VALU E mode for this parameter.
STEP
5:
Press the
< <
button once to turn off DC01 's waveforms.
Its SAW (Sawtooth) waveform is routed separately for FM
so we don't need to actually hear it.
STEP 6:
Repeat Steps 1 through 4 for DC02 "16 WAVE
SELECT". We are not interested in hearing DC02 either
for this experiment.
STEP
7:
Select VCF
I
VGA "24 RESONANCE" and set its VALUE
to +63 so that the Filter will oscillate.
STEP
8:
Select F M
I
TRACK "30 VCF F M AMOUNT" and with the
>
button , gradually increase its VALUE while you are
playing notes on the Master controller's keyboard. What
you will hear will be the new harmonics generated by the
FM process.
Working with FM
A wide variety of FM-generated sounds can be produced by the MATRIX-
6R. There are three main components that interact to create FM sounds on
the MATRIX-6R: DC01 "00 FREQUENCY", VCF / VGA "21 FREQUENCY"
and FM
I
TRACK "30 VCF FM AMOUNT". Experiment by changing the
Values of each of these three parameters.
30 VCF FM AMOUNT
This parameter, as described previously, controls the amount of
DC01 modulating the VCF. It is the "amplitude" or depth portion of
FM. VALUE range is from O to +63 where O is no effect and 63 is
maximum amplitude.
With a small FM amount, the overtones generated will be the
frequencies of DC01 and the VCF plus the sum and difference of
their frequencies. I ncreasing the AMOUNT Value will cause other
overtones to be generated as well. Changing the AMOUNT Value
changes the volume and number of the overtones, similar to
conventional filtering.
Matrix-6R Owner's Manual
37
