Re: Analog to MIDI
By Karl Petersen
I noticed this in yesterday's mail and downloaded the abstract:
ACOUSTICAL SOCIETY OF AMERICA, Abstracts of Papers from the 130th Meeting, St. Louis, MO, 27 November - 1 December 1995
Automatic recognition of musical notes.
Jimmy H. Kapadia, John F. Hemdal, Dept. of Elec. Eng. and Comput. Sci., Univ. of Toledo, Toledo, OH 40406
A system for the automatic recognition of musical notes was designed and implemented on a IBM-PC using commonly available hardware. The input to the system was a recorded piece of monophonic music while the output was its musical score. The recognition was carried out in the time as well as the frequency domains. Different characteristics of the note, like its frequency (or its name) and its time value, were found. The approach for this project was primarily from a digital signal processing (DSP) point of view. Various DSP fundamentals, like comb filter analysis and cepstrum analysis, were used for achieving the ends. The emphasis was more on trying out different approaches than on achieving a desirable result. Finally, an attempt was made to recognize a chord.
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Sort of rudimentary, but applicable, and especially intriguing if you have a deviated cepstrum that you'd like to have analyzed.
My son tells me that he can buy a guitar pickup that outputs in MIDI from an acoustic or electronic guitar with no trouble. This is apparently not a one-note application.
Karl A. Petersen |
(Message sent Fri 13 Oct 1995, 18:46:17 GMT, from time zone GMT-0600.) |
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