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NORD MODULAR V3.0
The Clock generator is an example of a module that sends logic signals. A logic signal is also a unipolar
signal but it has only two possible values, two states: low (0 units) or high (+64 units).
The types of output signals of each module in Nord Modular will be described further on in this manual
using the definitions: bipolar, unipolar and logic.
R R R R
E E E E S S S S O O O O L L L L U U U U T T T T I I I I O O O O N N N N A A A A N N N N D D D D H H H H E E E E A A A A D D D D R R R R O O O O O O O O M M M M
The internal resolution of the Nord Modular system is 24 bits. This ensures a supreme audio quality. The
headroom of the audio signals in Nord Modular is -12 dB for every sound source. This means that if you
mix more than 4 sound sources in a voice, at very high or un-attenuated levels, distortion may occur. This
is easily dealt with by attenuating the levels of the sound sources.
The mix bus headroom of the output modules is -6 dB per bus. See the headroom diagram in
room" on page
215.
The amplitude of the audio signals increases for each voice you play. A monophonic patch with an am-
plitude that is perfectly within the headroom, might produce distortion in the Output modules if more
voices are added and played together.
To determine where any unwanted distortion occurs, first try to lower the level on the Output module(s)
in the patch. This action removes any mix bus related distortion. If this does not help, check the input
signals to the mixers in the patch for possible distortion
A A A A
U U U U D D D D I I I I O O O O S S S S I I I I G G G G N N N N A A A A L L L L S S S S
Audio signals are bipolar as described above. The audio signals in Nord Modular are 24-bit at 96 kHz
sampling frequency for extremely high quality, and they have highest priority in the Sound engines. Au-
dio connectors are distinguished by the red color. Do not let the description "audio" stop you from ex-
perimenting with these signals. They can be used to modulate things too. You can, for example, patch
the red audio output from an oscillator to a blue Pitch input of another oscillator.
C C C C
O O O O N N N N T T T T R R R R O O O O L L L L S S S S I I I I G G G G N N N N A A A A L L L L S S S S
Control signals are sent from envelope generators, LFOs, the keyboard, sequencers etc. The control sig-
nals can be either uni- or bipolar. They are used to control or modulate parameters in a patch. The control
signals are 24-bit at 24 kHz sampling frequency, i.e. a quarter of the audio signal bandwidth. This is be-
cause they are often low-frequency signals by nature, and do not require a high bandwidth. The control
signal connectors are distinguished by the blue color.
L L L L
O O O O G G G G I I I I C C C C S S S S I I I I G G G G N N N N A A A A L L L L S S S S
Logic signals are used to clock, trig or gate different functions. They have two possible levels, low (0 units)
or high (+64 units). The logic signals use the same bandwidth and resolution in Nord Modular as the
control signals.
Logic signal connectors are distinguished by the yellow color.
The state when a logic signal switches from 0 units to +64 units, is called the positive edge. When the
logic signal change back to 0 units again, is called the negative edge. The logic inputs in the system can
react to an incoming signal in four different ways. These are easily recognized by one of three symbols or
the absence of a symbol, next to the input.
, , , ,
R R R R E E E E D D D D C C C C O O O O N N N N N N N N E E E E C C C C T T T T O O O O R R R R S S S S
, , , ,
B B B B L L L L U U U U E E E E C C C C O O O O N N N N N N N N E E E E C C C C T T T T O O O O R R R R S S S S
, , , ,
Y Y Y Y E E E E L L L L L L L L O O O O W W W W C C C C O O O O N N N N N N N N E E E E C C C C T T T T O O O O R R R R S S S S
4. Basic functions
"Head-
Page 29
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