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Convention Paper

An Architecture for Reverberation in High Order Ambisonics

Authors: Lopez-Lezcano, Fernando

AES Convention 137 · Paper 9109 · October 2014

Abstract

This paper describes a reverberation architecture implemented within the signal chain of a periphonic HOA (High Order Ambisonics) audio stream. An HOA signal (3rd order in the example implementation) representing the dry source signal is decoded into an array of virtual sources uniformly distributed within the reverberant space being simulated. These virtual sources are convolved with independent, decorrelated impulse responses, optionally tailored to model spatial variations of the simulated reverberation. The output of each convolver is then encoded back into High Order Ambisonics and mixed with the original Ambisonics dry signal. The result is a convolution reverberation engine with a HOA input that outputs HOA and maintains the spatial characteristics of the input signal.

Details

Published in
AES Convention 137
AES Convention
137
Paper number
9109
Publication date
October 6, 2014
Session subject
Spatial Audio
Affiliation
CCRMA, Stanford University, Stanford, CA, USA (See document for exact affiliation information.)
Type
Convention Paper