GFDN-Reverb with FFM

Stereo reverb to simulate coupled rooms with parameters to control the reverberation of each room individually, and control coupling between them. This could be used to simulate the acoustics of a box in an opera, or lateral chapels in churches which exhibit two-stage decay. The underlying architecture is called the Grouped Feedback Delay Network, which is an extension of the more popular Feedback Delay Network.

In this version, filters have been added to the feedback matrix to simulate diffraction between coupled rooms. Depending on the size of the aperture connecting the two spaces, lower frequency waves 'bend' around the aperture producing a slight low-pass effect.

Updates and bug fixes

• Filter feedback matrices to simulate low pass effect due to diffraction.
• Optimizations by Jatin.

GFDN with scalar coupling

GFDN Reverb v1.0.0

Stereo reverb to simulate coupled rooms with parameters to control the reverberation of each room individually, and control coupling between them. This could be used to simulate the acoustics of a box in an opera, or lateral chapels in churches which exhibit two-stage decay. The underlying architecture is called the Grouped Feedback Delay Network, which is an extension of the more popular Feedback Delay Network.

In this release, the coupling coefficients are scalar. In a future release, frequency-dependent coupling coefficients will be added.

Bug fixes:

• Fixed scaling of parameters from Jatin's implementation. Audio should no longer clip.
• Made a separate class for the coupled feedback matrix to allow more flexibility in its design.