We proposed a new signal processing technique that provides piano-roll-like display of given polyphonic music signal with a simple transform in specmurt domain (a new concept that enables us a harmonic component suppression of multi-tone signals). We tested our proposed method on several pieces of polyphonic music excerpted from the RWC music database[9]. 2 examples of the anasylis results are shown in this paper to show how our method is effective. From the experimental results, we were able to confirm that harmonic components were mostly suppressed and the fundamental frequency components were successfully enhanced.
Our future work includes automatic conversion of music sound into the MIDI format, interactive music editing tools, and combination with other multi-pitch analysis techniques [7,8]. In the technical side, automatic learning algorithms of the common harmonic structure pattern will be investigated for the further improvement.
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