Nord Modular G2 handleiding

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13. Module reference: Level group NORD MODULAR G2 V1.4x
Page 228
incoming signals (input 1 times input 2 = output). It also functions as a ring modulator (see example
below). See also the LevMod module later in this chapter
INPUTS
Patch two separate signals to each of the inputs. A signal with a level of 0 units at any of the inputs will
close the gain control function, a signal with a level of +64 units at any of the inputs will open the gain
control function completely. A signal with a level of -64 units at any of the inputs will invert the polarity
of the output signal. See also "Common Level module parameters”.
R
INGMODULATOR
Many classic analog synthesizers feature a module named a ringmodulator. The name ringmodulator
refers to an electronic circuit used in the early days of shortwave radio and telephony and the original
circuit was made with coils and crystal diodes. The ringmodulator circuit is able to multiply two signals
together, similar like how a mixer adds two signals together. When transistors became available the
ringmodulator circuit was replaced by a transistorized circuit named a balanced modulator or four
quadrant multiplier. All analog synthesizers used the transistorized balanced modulator circuit and not
the original coils and diodes circuit. But probably as in some of the earliest electronic music of the 1950’s
the original coils/diodes circuit was used there is some lore about the ringmodulator, which in fact is
nothing but lore.
The G2 equivalent of the balanced modulator is the LevMult module. It does exactly what a
ringmodulator does, so it could have been named ringmodulator. Or balanced modulator, or four
quadrant multiplier. But instead the name LevMult was chosen, as that is what all these ‘ringmodulator’
circuits actually are: plain multipliers.
Multiplying two repetitious waveforms with each other produces a new waveform, which contains
frequencies that on the frequency scale have ‘sum and difference’ values. Read more on this at “Ring
modulation” on page 281.
There are basically three types of analog devices that have become known as ringmodulators in the
synthesizer world. All three have at least one multiplier circuit at their heart. The first and simplest type
has only two inputs and one output and nothing more, not even knobs. On the G2 this type is named
the LevMult module. A second and slightly more versatile incarnation has one extra control knob that
lets the output crossfade between the multiplier output and one of the multiplier inputs. On the G2 this
type is named the LevMod module. The third incarnation is a pretty complex circuit known as the Bode
ringmodulator or Bode frequency shifter, which contains a complex phase shifting network, a built in
oscillator and four multipliers and a mixing network. The advantage of the Bode frequency shifter is that
it has the sum and difference frequencies available on two separate outputs. On the G2 this type is named
the FreqShift module in the FX module group.
So, if you’re looking for a ringmodulator in the G2 and you think you can’t find it, know that all classic
variations of ringmodulators are actually present, but simply with more correct names. For your
convenience the three basic patches of ‘classic’ ringmodulators are shown together. Note that the
LevMod and FreqShift modules used in the second and third examples will be explained later.

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Productinformatie

MerkNord
ModelModular G2
CategorieNiet gecategoriseerd
TaalNederlands
Grootte60689 MB