Nonlinear Wave Digital Filters, Continued

Computational Strategies:

• The nonlinear reflectance can be pre-computed and stored for fast interpolated table look-up in real time (no iterations)

• When there are several nonlinear elements at the root, Newton iterations are typically used instead of tables

• Alternatively, all nonlinearities can be placed at the root of the WDF tree and connect to the BCT through an R-Node. References:

  1.

  ``Wave Digital Filter Adaptors for Arbitrary Topologies and Multiport Linear Elements''

  2.

  ``Resolving Wave Digital Filters with Multiple/Multiport Nonlinearities''

  Kurt Werner et al.
  Int. Conf. Digital Audio Effects (DAFx-15)
  Trondheim, Norway, 2015