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• W5937086 abstract "This paper presents a filter configuration for canceling and separating partials from inharmonic piano tones. The proposed configuration is based on inverse comb filtering, in which the delay line is replaced with a high-order filter that has a proper phase response. Two filter design techniques are tested with the method: an FIR filter, which is designed using frequency sampling, and an IIR filter, which consists of a set of second-order allpass filters that match the desired group delay. It is concluded that it is possible to obtain more accurate results with the FIR filter, while the IIR filter is computationally more efficient. The paper shows that the proposed analysis method provides an effective and easy way of extracting the residual signal and selecting partials from piano tones. This method is suitable for analysis of recorded piano tones. In this paper, the extraction of the residual signal and selection of single partials from inharmonic piano tones by means of digital filtering are discussed. Both the tonal and noise components are essential in signal analysis. For example, the decay rates of the partials [1] or analysis of the sustain pedal [2, 3] provide important information for sound synthesis. The proposed residual signal extraction technique is based on inverse comb filtering, an approach that was used already by Moorer in the 1970s for pitch detection in speech signals [4], and analysis of musical tones for obtaining parameters for additive synthesis [5]. In this work, the delay line in the inverse comb filter is replaced by an FIR or IIR filter, which has a proper phase specification for matching the partial frequencies of an inharmonic piano tone. Recently, this idea has been used for analysis of harmonic musical instrument tones [6, 7, 8], where the spectral components are integral multiples of the fundamental frequency. This is not the case with the piano, however, where the partial components are stretched upwards in frequency due to dispersion, a typical feature of stiff musical instrument strings. The purpose of this work is to provide a simple yet effective tool for analyzing inharmonic musical instrument tones using the same starting point as in [6, 7, 8]. The required parameters for the method are the fundamental frequency and the inharmonicity coefficient. These parameters can be obtained by using some inharmonicity estimation algorithm, such as the inharmonic comb filter method proposed by Galembo and Askenfelt [9] or the partial frequency deviation algorithm presented by Rauhala et al. [10]." @default.
• W5937086 created "2016-06-24" @default.
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• W5937086 date "2008-01-01" @default.
• W5937086 modified "2023-09-26" @default.
• W5937086 title "ANALYSIS OF PIANO TONES USING AN INHARMONIC INVERSE COMB FILTER" @default.
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