Improved Reverberation Time Control for Feedback Delay Networks

Tutkimustuotos: Artikkeli kirjassa/konferenssijulkaisussavertaisarvioitu

Tutkijat

Organisaatiot

  • International Audio Laboratories Erlangen

Kuvaus

Artificial reverberation algorithms generally imitate the frequency-dependent decay of sound in a room quite inaccurately. Previous research suggests that a 5% error in the reverberation time (T60) can be audible. In this work, we propose to use an accurate graphic equalizer as the attenuation filter in a Feedback Delay Network reverberator. We use a modified octave graphic equalizer with a cascade structure and insert a high-shelf filter to control the gain at the high end of the audio range. One such equalizer is placed at the end of each delay line of the Feedback Delay Network. The gains of the equalizer are optimized using a new weighting function that acknowledges nonlinear error propagation from filter magnitude response to reverberation time values. Our experiments show that in real-world cases, the target T60 curve can be reproduced in a perceptually accurate manner at standard octave center frequencies. However, for an extreme test case in which the T60 varies dramatically between neighboring octave bands, the error still exceeds the limit of the just noticeable difference but is smaller than that obtained with previous methods. This work leads to more realistic artificial reverberation.

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoProceedings of the International Conference on Digital Audio Effects
TilaJulkaistu - 2 syyskuuta 2019
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisuussa
TapahtumaInternational Conference on Digital Audio Effects - Birmingham, Iso-Britannia
Kesto: 2 syyskuuta 20196 syyskuuta 2019
Konferenssinumero: 22

Julkaisusarja

NimiProceedings of the International Conference on Digital Audio Effects
ISSN (painettu)2414-6382
ISSN (elektroninen)2413-6689

Conference

ConferenceInternational Conference on Digital Audio Effects
LyhennettäDAFX
MaaIso-Britannia
KaupunkiBirmingham
Ajanjakso02/09/201906/09/2019

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