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10. Technical reference: Signal types in a Patch
either a low level of 0 units or a high level of +64 units. When a red signal is connected to a module with
a yellow input, a yellow output connector on that module often changes to orange (and the blue outputs
to red), which indicates that the module will now use the 96 kHz bandwidth inherited from the red signal
on its input.
The moment when a Logic signal switches from
positive edge or positive flank. When the Logic signal changes back to
edge of negative flank. The Logic inputs on the G2 modules can react to an incoming signal in three
different ways. These are easily recognized by either an
input, or by the absence of such a symbol.
L
OGIC INPUTS
A Logic input that responds to the
standard round input connector without any symbol next to its name. A typical example is the
Gate input on an Envelope module. Several modules with Logic inputs have an associated green
indication light in the Editor screen that lights up to show whether the signal on the input is currently
processed as a
LOW
Please note that even though the input responds to the state of the Gate signal, the response can be subtly
different for the positive and the negative edges. An example is when the Gate input on the ADSR
envelope generator receives a Logic signal from another module. The positive edge of the Logic signal
will "start" the envelope. Then, while the Logic signal stays
at the negative edge the Logic signal switches back to
A Logic input that reacts only to the positive edge has an arrow, pointing upwards, next to it. This
positive edge is often named a trigger or a clock pulse. This is a typical behaviour of a clock input on
a Sequencer, a Sample & Hold or a Clock Divider module. This type of input is only interested in the
exact moment a logic signal changes from
change on an exact moment in time. The advantage of triggering is that it can force something to happen right
on the beat.
There are some Logic inputs that will react to the positive edge of a Logic signal, but will delay
their action until a clock signal on another Clk input is coming into the module as well. These
inputs have a barred arrow symbol next to them. A barred arrow looks like an arrow pointing upwards
towards a horizontal bar (line). The Rst input on the various sequencer modules is an example of this.
When a Rst input receives a positive edge it will prepare the module to restart on the next Clk pulse. This will
cause the restart of the sequencer to happen right on the beat. This behaviour is sometimed named delayed
logic, as there is small time-delay involved to make sure that all happens in sync to the beat.
A logic input with a barred arrow signal always needs another logic input with a plain arrow, and will
synchronize its effect to the input with the plain arrow.
The different behavior of the logic inputs is in general considered to be a difficult subject. To fully
understand the subtle difference you need to experiment with these signals and closely observe how they
react. After some time you will develop a feel on how to use these inputs. When making complex
sequencer patches it is important to build and check them brick by brick. This makes it easier to keep some
overview and control over the timing of the gate and trigger signals that will sequence the note and
modulation patterns.
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or
HIGH
signal or as a
signal.
HIGH
to
LOW
to
(= 0 units to +64 units) is named the
LOW
HIGH
LOW
or a
ARROW
BARRED ARROW
level or state of the Logic signal looks like a
LOW
the envelope is 'sustained', and when
HIGH
again the envelope is 'released'.
LOW
. Keep in mind that a trigger is always used to flag some
HIGH
NORD MODULAR G2 V1.4x
units again, is named the negative
symbol next to the
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