FDN Reverb
Posted: Sat Jan 06, 2018 7:21 am
Hi gang,
Feedback Delay Network (FDN) reverbs are considered among the best algorithmic reverb designs. A number of parallel delay lines is configured, where each output feeds back into all other delay line inputs. As a result, echoes are generated with rapidly increasing density.
However, for most parameter sets the sound is not pleasant to the ear due to mode clustering in the frequency domain, which is perceived as ringing. Only by careful selection of the delay lengths is it possible to suppress this ringing to an acceptable level.
Another design characteristic is the number of delay lines used. I have not obtained satisfactory reslts with fewer than 16.
The atached optimized implementation is comparable in terms of CPU demand to the (likewise optimized) Freeverb. As to the sound quality, judge for yourself!
Have fun!
Feedback Delay Network (FDN) reverbs are considered among the best algorithmic reverb designs. A number of parallel delay lines is configured, where each output feeds back into all other delay line inputs. As a result, echoes are generated with rapidly increasing density.
However, for most parameter sets the sound is not pleasant to the ear due to mode clustering in the frequency domain, which is perceived as ringing. Only by careful selection of the delay lengths is it possible to suppress this ringing to an acceptable level.
Another design characteristic is the number of delay lines used. I have not obtained satisfactory reslts with fewer than 16.
The atached optimized implementation is comparable in terms of CPU demand to the (likewise optimized) Freeverb. As to the sound quality, judge for yourself!
Have fun!