Can be used as amplitude value for enumeration types
and other types, where a numeric amplitude makes no sense.
It is essential in
It would be a bad idea to omit the
in dimensional causal processes
since the correspondence between amplitude type and sample type would be lost.
Flat y is quite the same as
Dimensional Dim.Scalar y
but in some cases it allows a little more efficient processing.
It should not be mixed up with
Flat y is reserved for numeric amplitudes.