Yamaha DX9 Operating Manual page 11

•
Basic Operator Functions
1
)
Relationship of
Carrier to
Modulator
An
operator can be used
as either a carrier or
modulator.
These two
basic
operator functions
are the
basis for
the
FM
tone generation system.
Two
operators can be
combined
in
two
different ways.
1.
Modulator and
carrier
combinations
Modulator
Carrier
PITCH
-^
—^Output
2.
Carrier
and
carrier combinations
PITCH
0P1
Carrier
OP
2
Output
2) Carrier
and
Carrier
This configuration
results
in
a
pure
sine
wave
output
from
both
operators.
The
combination of these
waveforms
can
sound much
like a
conventional
organ.
• Carrier
and
carrier
combinations
Operator
1
PITCH
PITCH
Output
Carrier
3)
Modulator and
Carrier
In
the modulator/carrier configuration using
two
operators,
shown
in
the
figure, the operator
on
the
left
is
the
modu-
lator
and
the operator
on
the right
is
the
carrier. In the
FM
system, the
last
operator
in
a
chain of two
or
more
oper-
• Modulator and
carrier
combinations
Operator
1
ators
is
the
carrier.
By
varying the
ratio of the
modulator
and
carrier
frequencies,
and by
varying the envelope
of the
modulator, an extremely broad
range of highly
complex
waveforms (complex harmonic
structure)
can be
created.
PITCH
Operator 2
PITCH
Output
<I0>