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A Simple Hardware Pitch Extractor

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The need exists for a simple, hardware, real-time pitch extractor for speech research, training, and similar applications requiring less than perfect accuracy. A simple combination of a band-pass filter and a fast amplitude detector formed from a tapped analog delay line provides useful and reliable pitch contours from a live speech input.

JAES Volume 30 Issue 3 pp. 135-139; March 1982
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AES - Audio Engineering Society