Pitch Estimation of Solo and Duet Songs using Double Comb Filters

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  • 二重くし形フィルタによる独唱・二重唱の音高推定
  • ニジュウクシガタ フィルタ ニ ヨル ドクショウ ニジュウショウ ノ オト コウスイテイ

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Abstract

This paper proposes a new method for the pitch estimation of sung songs for transcription. The previous pitch estimation methods that are considered most for musical instrument sounds but few for sung songs are based on the extraction of the pitch frequencies. But the extraction of the pitches is rather difficult and sophisticated signal processing is necessary since the musical sound has many harmonic components. The principle of our method is the elimination of the pitch and its harmonic frequencies. This can be performed simply by a comb filter. To adapt the fluctuation of song pitches, we use double comb filters. Using two cascade connected twelve double comb filters that are connected in parllel and are corresponding to each tone in one octave, we can estimate the pitches of solo and duet songs.

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