The Audio Engineering Society 16th International Conference: Spatial Sound Reproduction, 10-12 April 1999


Low-latency convolution for real-time applications

Christian Müller-Tomfelde

now at GMD-IPSI
formerly at ZKM | Center for Art and Media Technology Karlsruhe
Institute for Music and Acoustics

The real-time convolution of a sound signal with measured or computed room-impulse responses poses severe problems as regards computation load, system latency and memory requirements. Some key features of frequency-domain convolution allow to solve the dilemma between latency and computational complexity. Extrapolation from nowadays implementations on off-the-shelf computers allows to sketch future software solutions. In addition the properties in structure and dynamic of the room-impulse responses match ideal with those of the low-latency convolution algorithm for real-time spatial sound processing.

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Last modified: 12.03.1999