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Version=Nord Modular patch 3.0
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4 117 0 13 
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6 4 0 17 
7 43 1 3 
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1 AudioIn1
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3 OscA2
4 RingMod1
5 RingMod2
6 2 outputs1
7 Constant1
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[Notes]

Just take the RM module and set the big knob to the RM setting, input any 
audio and connect an oscillator to the modulation input. As an alternative 
you can use the gain controller module as well. Thats also a ringmodulator, 
or better balanced modulator or more technical a four-quadrant multiplier. 
Different words for the same thing.
You can even use the AM input present on some of the slave oscillators, as 
those are actually ringmodulators as well.

The actual ringmodulator circuit is around for a very long time, it was and 
still is used much in radio techniques, e.g. in shortwave radio SSB and for 
decoding FM radio signals to audio. It is also used as a 
scrambler/descramber, ringmodulation of a signal with a high frequency 
sinewave can be more or less undone by ringmodulating it again with a 
sinewave of the same frequency. If those sinewaves don't match perfectly 
you get a 'beat' in the signal, like you can hear on some shortwave 
radiobands. Scrambling with two disharmonic sinewaves means you need to 
know the exact frequencies of those two waves to render the signal legible 
again. Sixties 007 stuff, so to say.

Feeding a sinewave in both inputs of a ringmodulator will output a sinewave 
with the frequency twice as high. The signal will also be positive only.
This can be very useful on LFO signals, its like you flip the negative 
portion to the positive domain and make it exponential as well. I use this 
a lot on the random LFO as it will thus give a positive only signal with a 
more natural 'exponential' modulationcurve on e.g. slow random 
filtersweeps. Just feed the random LFO into both inputs of a gain 
controller module and connect the output to e.g. a modulation input of a 
filter or the phaser module and set the LFO speed to a slow speed.

There is some confusion about were the name comes from, some say it comes 
from a German radio engineer named Ring, others say it comes from the fact 
that in ancient times two transformers and a ring of four diodes were used 
to build the actual circuit. Well, who cares...

Its hard to use the effect musically, but a very good example of some 
ringmodulator uses you will find on the seventies Billy Cobham album 
Spectrum. Suppose those can be considered classical ringmodulator sounds, 
as that album was very well-known then.

Have fun,
Rob H
[/Notes]