1. First steps in Reaktor Core - Native Instruments

5. Audio processing at its core
5.1. Audio signals
There is no special type for audio signals in Reaktor Core; audio signals are
represented by events that, from the structure point of view, do not differ
from any other event. What is different is that along the audio signal path the
events are normally produced at regularly spaced time intervals, where the
time between events is determined by the sampling rate.
To produce regularly spaced events (or for that matter, any events) we need
some event source. As with event core cells, where the inputs of the module
are the event sources, in audio core cells the inputs are also event sources.
However, we now have an extra input type available:
Audio Inputs repeatedly send core events to the inside of the structure
at the rate determined by the sampling rate setting of the outside
primary-level structure. The events are sent simultaneously from all
audio inputs of a core-cell structure.
The audio inputs also send the initialization event to the core-cell
structure. This event is sent regardless of what happens in the primarylevel
structure outside. However the value sent by these inputs during
the initialization is dependent on the outside initialization process.
There is also a new output type which has to be used instead of event outputs.
Audio Outputs deliver the last value received from the inside core structure
to the outside primary-level structure. Because the audio outputs in the
primary level do not send events, no events are sent to the outside.
Now we are going to rebuild the same shaper we built for events in audio
mode. Therefore we create a new audio core cell. Generally we can use exactly
the same structure, except instead of event inputs and outputs we will have
audio inputs and outputs:
You may wonder why didn’t we use the modulation macros in this case? The
reason is that we are processing audio signals here, and audio signals always
send the initialization event, so it’s safe to do it this way. (You could use
modulation macros if you prefer; it doesn’t really matter.)
REAKTOR CORE – 87