In this paper, we describe some features of the Forte Pedal piano effect and propose a method for detecting it through signal analysis. The detection method is applied to single tones recorded for this purpose. The Forte Pedal is found to increase the decay time of partials. in fact this effect dominates the behavior of the partials, in not only the duration, but also the evolution. When the sustain pedal is used, a floor noise appears for all the notes of the piano. Here, after the analysis of some relevant caracteristics we provide a method based on harmonic plus noise decomposition for analysing the residual and decide if the pedal is pressed or not.
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