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This paper presents a new environment for ultra-low-latency processing of audio and sensor data on embedded hardware. The platform, which is targeted at digital musical instruments and audio effects, is based on the low-cost BeagleBone Black single-board computer. A custom expansion board features stereo audio and 8 channels each of 16-bit ADC and 16-bit DAC for sensors and actuators. In contrast to typical embedded Linux approaches, the platform uses the Xenomai real-time kernel extensions to achieve latency as low as 80 microseconds, making the platform suitable for the most demanding of low-latency audio tasks. The paper presents the hardware, software, evaluation, and applications of the system.
Author (s): McPherson, Andrew; Zappi, Victor
Affiliation:
Queen Mary University of London, London, UK; University of British Columbia, Vancouver, BC, Canada
(See document for exact affiliation information.)
AES Convention: 138
Paper Number:9331
Publication Date:
2015-05-06
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Session subject:
Applications in Audio
Permalink: https://aes2.org/publications/elibrary-page/?id=17755
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McPherson, Andrew; Zappi, Victor; 2015; An Environment for Submillisecond-Latency Audio and Sensor Processing on BeagleBone Black [PDF]; Queen Mary University of London, London, UK; University of British Columbia, Vancouver, BC, Canada; Paper 9331; Available from: https://aes2.org/publications/elibrary-page/?id=17755
McPherson, Andrew; Zappi, Victor; An Environment for Submillisecond-Latency Audio and Sensor Processing on BeagleBone Black [PDF]; Queen Mary University of London, London, UK; University of British Columbia, Vancouver, BC, Canada; Paper 9331; 2015 Available: https://aes2.org/publications/elibrary-page/?id=17755