Binaural Dark Velvet Noise Reverberator

Binaural late-reverberation modeling necessitates the synthesis of
frequency-dependent inter-aural coherence, a crucial aspect of spa-
tial auditory perception. Prior studies have explored methodolo-
gies such as filtering and cross-mixing two incoherent late rever-
beration impulse responses to emulate the coherence observed in
measured binaural late reverberation. In this study, we introduce
two variants of the binaural dark-velvet-noise reverberator. The
first one uses cross-mixing of two incoherent dark-velvet-noise se-
quences that can be generated efficiently. The second variant is
a novel time-domain jitter-based approach. The methods’ accu-
racies are assessed through objective and subjective evaluations,
revealing that both methods yield comparable performance and
clear improvements over using incoherent sequences. Moreover,
the advantages of the jitter-based approach over cross-mixing are
highlighted by introducing a parametric width control, based on
the jitter-distribution width, into the binaural dark velvet noise
reverberator. The jitter-based approach can also introduce time-
dependent coherence modifications without additional computa-
tional cost.