A time-domain approach to estimating the plucking point of guitar tones obtained with an under-saddle pickup |
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Authors: | Henri Penttinen Vesa Välimäki |
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Institution: | Laboratory of Acoustics and Audio Signal Processing, Helsinki University of Technology, P.O. Box 3000, FI-02015 HUT, Espoo, Finland |
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Abstract: | A method for estimating the plucking point of guitar tones is proposed. The algorithm is based on investigating the time lag between two consecutive pulses arriving at the bridge of the guitar. The signal is detected with an under-saddle pickup attached to the bridge. The method determines the minimum of the autocorrelation function for one period of the signal. The time lag of the minimum can be converted into the distance from the bridge where the string was plucked. The results obtained with the method are good, the error remains smaller than one centimetre, except for a few outliers. The algorithm is easy to implement and can be used to analyse playing styles. The efficiency of the method gives the potential to also use it in real-time computer music applications. |
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Keywords: | Acoustic signal processing Autocorrelation Guitar Musical acoustics Plucked string instruments |
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