12. Synthesis basics: Other synthesis and modulation methods NORD MODULAR G2 V1.1
Page 218
R
RR
R
I
II
IN
NN
NG
GG
G
M
MM
MO
OO
OD
DD
DU
UU
UL
LL
LA
AA
AT
TT
TI
II
IO
OO
ON
NN
N
Ring modulation is similar to AM, but instead of using a unipolar (goes from zero level to positive levels)
modulator wave, a bipolar modulator wave is used. In the example below we use the same carrier wave as
in the AM example. We also use the same frequency of the modulator wave, only now it’s bipolar
time
amplitude amplitude
frequency
Fig 3. Amplitude Modulation
The side bands appear on each
side of the carrier wave on the
frequencies: f
C
-f
M
and f
C
+f
M
f
C
time
amplitude amplitude
frequency
Fig 1. RM Carrier wave
f
C
time
amplitude amplitude
frequency
Fig 2. RM Modulator wave
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