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A System for Multiple Channel Mixing and Processing of Digital Audio

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The GOTHAM Signal Arts-Sigma-DSP3 to the first power is an integrated environment for mixing, equalization and dynamics processing of up to 60 digital audio channels and is intended for use in professional music and post production studios. The system design and application software grew from preliminary multi-processor music synthesis work at AT&T Bell Laboratories and continued at GOTHAM Signal Arts Corporation. The system consists of a custom version of the DSP3 (1)(2), a massively parallel multi-processor developed at AT&T Bell Laboratories, a high fidelity digital interface to multi-track digital tape machines, an Ethernet connector allowing control information to be sent from existing scanned moving fader mixing consoles or computer virtual consoles, and a secondary processor for spectral analysis and display. The DSP3 is an array of up to 128 processing nodes, each node consisting of an AT&T DSP32C floating point processor, 256 Kbytes of zero wait state static RAM and a special communications ASIC also developed at AT&T Bell Laboratories. A custom operating system and processing software have been developed for the DSP3 by GOTHAM Signal Arts to allow the necessary communication bandwidth and processing power to handle up to 60 channels of digital audio.

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