Octave (interval region)
IMPORTED REVISION FROM WIKISPACES
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- This revision was by author Sarzadoce and made on 2011-08-09 15:49:00 UTC.
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Original Wikitext content:
The **octave** is one of the basic [[Gallery of Just Intervals|intervals]] for the most tonal systems. It is usually called the "interval of equivalence" because tones separated by an octave are perceived to have the same or similar pitch class to the average human listener. The reason for this phenomena is probably due to the strong region of attraction of low [[harmonic entropy]], or the strong amplitude of the second [[harmonic]] in most harmonic instruments. It has a frequency ratio of 2/1 and a size of 1200 [[cent|cents]]. It is used as the standard of (logarithmic) measurement for all just intervals. ==Links== * [[http://www.kylegann.com/Octave.html|Anatomy of an Octave]] by [[Kyle Gann]] * //[[http://launch.groups.yahoo.com/group/tuning/message/100427|The corrected progression of musical cells]]// - Mario Pizarro puts "imperfection of the man ear" in relation to the detectability of differences from the pure 2:1-ratio
Original HTML content:
<html><head><title>Octave</title></head><body>The <strong>octave</strong> is one of the basic <a class="wiki_link" href="/Gallery%20of%20Just%20Intervals">intervals</a> for the most tonal systems. It is usually called the "interval of equivalence" because tones separated by an octave are perceived to have the same or similar pitch class to the average human listener. The reason for this phenomena is probably due to the strong region of attraction of low <a class="wiki_link" href="/harmonic%20entropy">harmonic entropy</a>, or the strong amplitude of the second <a class="wiki_link" href="/harmonic">harmonic</a> in most harmonic instruments.<br /> <br /> It has a frequency ratio of 2/1 and a size of 1200 <a class="wiki_link" href="/cent">cents</a>. It is used as the standard of (logarithmic) measurement for all just intervals.<br /> <br /> <!-- ws:start:WikiTextHeadingRule:0:<h2> --><h2 id="toc0"><a name="x-Links"></a><!-- ws:end:WikiTextHeadingRule:0 -->Links</h2> <ul><li><a class="wiki_link_ext" href="http://www.kylegann.com/Octave.html" rel="nofollow">Anatomy of an Octave</a> by <a class="wiki_link" href="/Kyle%20Gann">Kyle Gann</a></li><li><em><a class="wiki_link_ext" href="http://launch.groups.yahoo.com/group/tuning/message/100427" rel="nofollow">The corrected progression of musical cells</a></em> - Mario Pizarro puts "imperfection of the man ear" in relation to the detectability of differences from the pure 2:1-ratio</li></ul></body></html>