1. First steps in Reaktor Core - Native Instruments

In the value field type a new value of 0.25:
This is how the QuickConst should look now in the structure:
Let’s explain what we have just done. The port on the left side of the input
module specifies a so-called default signal. That means that if the input is
not connected (on the outside of the macro), the default signal will be taken
as the input source. In our case, if the T input of the Tape Delay macro is not
connected on the outside, it will behave as if you have connected a constant
value of 0.25 to it.
Of course, a connection to the QuickConst is not the only possible connection
for the default signal input. You can connect it to any other module in the
structure, including other input modules.
Now that we have saturation and a default value for the T input, let’s emulate
a tape flutter effect. A simple way to do that is to modulate the delay time
with an LFO. You could experiment with different LFO shapes for better flutter
effect, but for now, just take one from the library: Standard Macro > LFO
> Par LFO:
REAKTOR CORE – 45