There's a nice series of articles on acoustics and pyschoacoustics over at Audio Design Line. Part One, for example, looks at pressure waves, propagation velocity, frequency, wavelength, and related items.
The sequence is a nice overview if you're interested in the mechanics of music and audio but have no formal training in the subject.
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My wife and I went to a Crosby, Stills, Nash & Young concert the other evening at the Saratoga Performing Arts Center. It was a great show in spite of a little rain. You can read a local review of it here. What does this have to do with photons and pressure waves? I'll get to that in a minute…
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