<div><br>For more examples along these lines, I have an article in a recent Music Theory Online that discusses a dissonant perfect unsion (!) by J. S. Bach. </div>
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<div><a href="http://mto.societymusictheory.org/issues/mto.10.16.1/toc.16.1.html">http://mto.societymusictheory.org/issues/mto.10.16.1/toc.16.1.html</a></div>
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<div>Tim Cutler</div>
<div>Cleveland Institute of Music<br></div>
<div> </div>Richard Hermann wrote:<br> <br>"Another mildly related situation occurs with dyadic definitions of dissonance such as "The Perfect 5th is a consonance." However, in a six-five chord a perfect fifth usually represents the dissonant chordal seventh in 18th- and 19th-century music. Atomistic and rigid definitions and perceptions seem to run into difficulties when applied to phenomena in the wild. They do have the mixed blessing of being easy to teach and learn.
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