Abstract
A FIR filter which is suitable for distilling sound of a part played by a particular instrument from a music ensemble is discussed in this report. The filter separates a monaural music signal into individual tones of every pitch with a particular timbre, the combination of which provides melodies played by an instrument. A mixture of strongly correlated signals such as the same pitch tones by different instruments can be processed by the proposed FIR filter to separate them which is modified from the discrete-time Wiener filter combined with a window and an evaluation method of current statistics of the mixture in the frequency-domain.
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