A method associated with digital signal processing for fabricating, by instantiation, an instance of a defined branch of a 5th-Order, wave-digital-filter (WDF), elliptical section, which fabricated branch instance, along with its associated 5th-Order, WDF elliptical section, forms a portion of a concatenated arrangement of Type-I and Type-II agencies in an overall, composite WDF, said method comprising
- associating a digital fabricating engine with selected control code which is employable to operate the engine in a time-sliced, instantiation-fabrication mode of operation that is effective to cause the engine to produce such a section-branch instance, and
- following said associating, and utilizing the selected, associated control code, operating the engine under control of the code to instantiate/create the defined branch instance.