Version OS 1.0
to the left or upwards. If you are editing FM sounds, beware that the feedback can
cause unpredictable results as this is a bit like chaos theory, so just add small amounts
of lefthanded feedback FM controls if you have already set strong righthanded
modulations. (Of course, like many things in math, this is a symmetrical matrix, so if
you only use the lefthanded modulations, the righthanded act as feedback. But in order
to not confuse everybody, we say the righthanded are the forward-moving and the
lefthanded are the feedback modulations as we read and write from the left to the
right).
Mostly you would want to create a sound like the following: OP 1 is the base tone and
has the lowest frequency, the other OP2- OP4 have ascending frequencies in order to
create more and more overtones. Now modulate the higher OPs by the lower and you
obtain wonderful, typical FM sounds. Then add a little feedback on the lefthanded
controls and hear the chaos rise...
The display always shows one row of the matrix if a knob is turned:
7.4.1.1 FM Modulation Matrix Page A
The numbers of the FM amounts show the source and destination of the matrix FM
amounts as described above. The following pages show the other parts of the matrix:
F S1 F r q FM1 - 2 F M1 -3 F 1 - 4
M O1 6
O1 O
O 5 5
O 2 9
F FM2 - 1 S2 F r q F M2-3 F 2 - 4
M OOO
O2 9
O O 5
O O 7
F FM3 - 1 FM3 - 2 S 3 Frq F 3 - 4
M OOO
OO O
O 6 8
O O 7
F FM4 - 1 FM4 - 2 F M4-3 S 4 F r
M OOO
OO O
O O O
O 9 5
ALPHA BASE Operating Manual
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