Stereo and spaciousness reverberation system using random access

Details Stereo and spaciousness reverberation system using random access Stereo and spaciousness reverberation system using random access

1976-07-16

1978-08-08

Brown, Thomas W.

179 1G, H04R 500

Patent

active

041058640

ABSTRACT:
A sound reproduction arrangement and audio signal delay apparatus suitable for use in such an arrangement, includes, in a listening area, one or more primary sound sources for mono- or multichannel reproduction respectively, and a plurality of secondary sources spaced around the perimeter of the listening area and each providing an acoustic signal corresponding to that from the primary source or sources delayed by a respective and independently selectable delay constant and attenuated by a respective and independently selectable gain constant. Control apparatus is connected with the sound sources to derive a plurality of signals for the respective sound sources from an input signal. The delay constants are substantially greater than the time taken for sound to traverse the listening area, so that the sound from the secondary sources simulates reverberation or reflected sound, and a listener has a sensation of spaciousness normally associated with an enclosure which is larger than the listening area, such as a concert hall, for example. Features of the invention include a random-access memory which stores time-multiplexed data representing sampled input audio and channel-control information.

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patent: 3949175 (1976-04-01), Tanizoe
patent: 4027101 (1977-05-01), De Fretas et al.

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