Streaming Spectral Processing with Consumer-level Graphics Processing Units

Lazzarini, Victor and ffitch, John and Timoney, Joseph and Bradford, Russell (2014) Streaming Spectral Processing with Consumer-level Graphics Processing Units. In: 17th International Conference on Digital Audio Effects (DAFx-14), 1-5 September 2014, Erlangen, Germany. (Unpublished)

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This paper describes the implementation of a streaming spectral processing system for realtime audio in a consumer-level onboard GPU (Graphics Processing Unit) attached to an off-the-shelf laptop computer. It explores the implementation of four processes: standard phase vocoder analysis and synthesis, additive synthesis and the sliding phase vocoder. These were developed under the CUDA development environment as plugins for the Csound 6 audio programming language. Following a detailed exposition of the GPU code, results of performance tests are discussed for each algorithm. They demonstrate that such a system is capable of realtime audio, even under the restrictions imposed by a limited GPU capability.

Item Type: Conference or Workshop Item (Paper)
Keywords: Streaming; Spectral Processing; Consumer-level; Graphics Processing Units; Realtime audio;
Academic Unit: Faculty of Arts,Celtic Studies and Philosophy > Music
Faculty of Science and Engineering > Computer Science
Item ID: 5853
Depositing User: Joseph Timoney
Date Deposited: 17 Feb 2015 16:56
Refereed: No

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