A graph element input.
A graph element input. This is further defined by a signal shape, and a boolean which indicates whether the input is evaluated only at the UGen's init phase.
the shape of signal. This may influence the choice of client-side Scala argument type
used. For example SignalShape.String means that the argument will indeed become
String instead of GE, although in the UGen expansion that string is converted
to UGen inputs.
if true, the input will be evaluated by the UGen only in its initialization phase.
It is still legal to pass in non-scalar input elements, this is merely an information
usable by the client.
An integer input.
An integer input. This is typically used to determine the UGen's number of channels.