NORD MODULAR G2 V1.1
5. Basic functions: Signals in the Patch
Page 29
means that if you mix more than 4 sound sources in a voice, at very high or un-attenuated levels, distor-
tion 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.
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 Patch Gain level on the top of
the Patch window. 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
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Audio signals are bipolar as described above. The audio signals in Nord Modular G2 are 24-bit at 96 kHz
sampling frequency for extremely high quality, and they have highest priority in the Sound engine. Audio
connectors are distinguished by the red color. Do not let the description “audio” stop you from experi-
menting 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
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N
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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
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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 can use either 24 kHz or 96 kHz bandwidth depending on appli-
cation and use 24-bit resolution. Logic signal connectors are distinguished by the yellow color. If 96 kHz
bandwidth is used, the connector color changes to orange.
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.
A logic input that responds to both edges of the logic signal has no symbol next to it. Please
note that even though they respond to both edges, the response is not the same for the
positive and the negative edge. An example of this is the Gate input on the ADSR envelope
generator. This input ”starts” the envelope when the positive edge of a logic signal appears
and “releases” the envelope when the logic signal switches back to 0 units again.
A logic input that reacts only to the positive edge has an arrow, pointing upwards, next to
it. This is a typical behaviour of a clock input on a sequencer module or a clock divider.
This input is only interested in the positive edges of a logic signal.
