A second-order Hadamard matrix may be defined by
As of version 0.9.30, Faust's math.lib4.12contains a function called hadamard(n) for generating an Hadamard matrix, where must be a power of . A Hadamard feedback matrix is used in the programming example reverb_designer.dsp (a configurable FDN reverberator) distributed with Faust.
A Hadamard feedback matrix is said to be used in the IRCAM Spatialisateur .
Householder Feedback Matrix
Energy Decay Relief