@ShortDescription
Selects the value of its inputs based upon the value of the control input

@Description
#name passes one of its inputs (x or y) based upon the value of the signal at its Cntl input. When Cntl is &ge; 0, the signal 
at input x is passed to the output. When Cntl &lt; 0, the signal at input y is passed to the output. This determination is
made on a sample by sample basis, so the #name plug-in can be used to modulate or select between two different signals based
upon the value of a third signal, which could be a control signal or an audio signal.