pyFDN.poletti_allpass

pyFDN.poletti_allpass(g, U)

Create Poletti’s MIMO unitary reverberator (allpass FDN).

From Poletti, M. (1995). A unitary reverberator for reduced colouration in assisted reverberation systems. INTER-NOISE and NOISE-CON, 5, 1223–1232.

Parameters:

• g (float) – Scalar feedback gain (e.g. 0.7).

• U (ndarray (N, N)) – Unitary (orthogonal) feedback matrix.

Returns:

A, B, C, D – Delay state-space matrices: A = -g*U, B = (1+g)*I, C = (1-g)*U, D = g*I.

Return type:

ndarray