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Sparse Frequency-Domain Reverberator

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There are many topologies for implementing the late part of artificial reverberation, each of which is a unique trade-off among perceived quality, computational cost, and parameter flexibility. A new approach, which assumes that the late reverberation can be described as a stochastic process, applies the reverberation in frequency bands using a combination of a feedback loop and an efficient sparse decorrelator. Listening tests with ten experts confirmed that the new reverberator topology has a perceived quality that was mostly equivalent to the idealized reverberation using decaying Gaussian noise response in frequency bands.

JAES Volume 59 Issue 12 pp. 936-943; December 2011
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AES - Audio Engineering Society