1. First steps in Reaktor Core - Native Instruments

The Gate2L, AND, and L2Gate modules are logic modules and can be found
in Standard Macro > Logic menu. The Gate LFO is a macro, which we’ve built
for this processor; it generates an opening and closing gate signal at regular
intervals.
The input gate and the output of the LFO are connected to Gate2L converters,
which convert the gate signals to logic signals, transforming open gates into
true and closed gates into false. The AND module outputs a true signal only if
both gates are in the open state at the same time. In other words the output
of the AND module is true if and only if the user holds a key and at the same
time the LFO outputs an open gate. That means that, as long as the user holds
a key, there will be alternating true and false values at the output of the AND
module, the speed of the alternation defined by the LFO rate. The output of
the AND module is converted back to a gate signal, whose amplitude is taken
from the gate input, thereby leaving the gate level unchanged.
Here is the structure for our Gate LFO macro:
The F input defines the rate of the gate repetitions, and the W input defines
the duration of open gates (at 0 they are 50% of the gate period, at –1 it’s
0%, and at 1 it’s 100%). The Rst input restarts the LFO in response to incoming
events (hence the LFO is restarted each time there’s a gate event at
the main gate input).
The module connected to the Rst input of the Rect LFO is called Value and
can be found in Standard Macro > Event Processing. It ensures the LFO is
restarted at zero phase by replacing the values of all incoming events by
the value at its lower input, which is zero. The LFO output is converted into
a gate signal by using a Ctl2Gate converter, also found in Standard Macro
>Event Processing.
Remember, LFOs do not work inside event core cells. If you want to try
out this structure, you’ll need to use an audio core cell.
REAKTOR CORE – 55