The paper describes the theory and the first operational results of a new multichannel recording system based on a 32-capsules spherical microphone array. Up to 7 virtual microphones can be synthesized in real-time, choosing dynamically the directivity pattern (from standard cardioid to 6th-order ultradirective) and the aiming. A graphical user’s interface allows for moving the virtual microphones over a 360-degrees video image. The system employs a novel mathematical theory for computing the matrix of massive FIR filters, which are convolved in real time and with small latency thanks to a partitioned convolution processor.

Authors: Farina, Angelo; Capra, Andrea; Chiesi, Lorenzo; Scopece, Leonardo
Affiliations: RAI CRIT Research and Technology Innovation Cente, Turin, Italyr; University of Parma, Parma, Italy(See document for exact affiliation information.)
AES Conference: 40th International Conference: Spatial Audio: Sense the Sound of Space (October 2010)
Paper Number: 3-1
Publication Date: October 8, 2010
Subject: Spatial Audio: Microphone and Mixing Techniques

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