Music acoustics is the branch of acoustics concerned with researching and describing the physics of music. Examples of areas of study are the function of musical instruments, the human voice, computer analysis of melody, and determination of stylistic parameters in compositions and performances.
The art and the science of music acoustics are presented on the site below, in musician-friendly format, as is some of the research work in music science.
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http://www.phys.unsw.edu.au/music/