Bohlen–Pierce scale
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=The Bohlen-Pierce scale= The Bohlen-Pierce scale is a [[nonoctave]] scale, a 13-part equal division of the perfect-twelfth (3/1). Each step is about 146 ¢, making it a [[macrotonal]] scale. It was discovered independently by Heinz Bohlen, John Pierce, Kees van Prooijen, and perhaps others, usually noticed for its good approximation of odd-number just ratios 3:5, 5:7, 3:7, etc. [[image:http://www.swordguitars.com/Sword_Bohlen_Pierce_acoustic.JPG width="270" height="133"]]Cutaway Bohlen-Pierce Classical Guitar [[image:http://ronsword.com/bpguitar.JPG width="212" height="290"]] Ron Sword and his hand-built 9-string Bohlen-Pierce Touchstick/Guitar crossover (aka: "//the Bohlen-Box//") **Theory** [[http://www.huygens-fokker.org/bpsite/|Bohlen Pierce website]] [[http://en.wikipedia.org/wiki/Bohlen-Pierce_scale|Wikipedia Bohlen-Pierce scale]] [[http://www.ziaspace.com/elaine/BP/The%20Bohlen-Pierce%20Scale.html|Bohlen-Pierce Scale Research]] by Elaine Walker Sword, Ronald. "Bohlen Pierce Scales for Guitar" IAAA Press, UK-USA. First Ed: May 2009. [[Intervals of BP]] ==Physical instruments tuned to the BP scale== [[@http://www.swordguitars.com/Sword_Bohlen_Pierce_acoustic.JPG|Bohlen Pierce guitar]] [[microtonal clarinet#BPClarinets|Clarinets]] Metallophone Electronic Organ Stredici ==Compositions== Links to available music written in BP at [[http://www.huygens-fokker.org/bpsite/references2.html#anchor81501|above website]]. [[http://www.seraph.it/XenoTunes4_files/Bohl-en%20Roll.mp3|Bohl-en Roll]] by Carlo Serafini [[@http://www.jeanpierrepoulin.com/mp3/BPguitares.mp3|Bohlen-Pierce electric guitar improvisation]] by [[@http://www.jeanpierrepoulin.com/|Jean-Pierre Poulin]] [[@http://www.ronsword.com/sounds/BP_stretched_chroma.mp3|Bohlen-Pierce "Stretched Chroma" Acoustic Improvisation]] by Ron Sword
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<html><head><title>Bohlen-Pierce</title></head><body><!-- ws:start:WikiTextHeadingRule:0:<h1> --><h1 id="toc0"><a name="The Bohlen-Pierce scale"></a><!-- ws:end:WikiTextHeadingRule:0 -->The Bohlen-Pierce scale</h1> <br /> The Bohlen-Pierce scale is a <a class="wiki_link" href="/nonoctave">nonoctave</a> scale, a 13-part equal division of the perfect-twelfth (3/1). Each step is about 146 ¢, making it a <a class="wiki_link" href="/macrotonal">macrotonal</a> scale.<br /> <br /> It was discovered independently by Heinz Bohlen, John Pierce, Kees van Prooijen, and perhaps others, usually noticed for its good approximation of odd-number just ratios 3:5, 5:7, 3:7, etc.<br /> <!-- ws:start:WikiTextRemoteImageRule:6:<img src="http://www.swordguitars.com/Sword_Bohlen_Pierce_acoustic.JPG" alt="" title="" style="height: 133px; width: 270px;" /> --><img src="http://www.swordguitars.com/Sword_Bohlen_Pierce_acoustic.JPG" alt="external image Sword_Bohlen_Pierce_acoustic.JPG" title="external image Sword_Bohlen_Pierce_acoustic.JPG" style="height: 133px; width: 270px;" /><!-- ws:end:WikiTextRemoteImageRule:6 -->Cutaway Bohlen-Pierce Classical Guitar<br /> <br /> <!-- ws:start:WikiTextRemoteImageRule:7:<img src="http://ronsword.com/bpguitar.JPG" alt="" title="" style="height: 290px; width: 212px;" /> --><img src="http://ronsword.com/bpguitar.JPG" alt="external image bpguitar.JPG" title="external image bpguitar.JPG" style="height: 290px; width: 212px;" /><!-- ws:end:WikiTextRemoteImageRule:7 --><br /> Ron Sword and his hand-built 9-string Bohlen-Pierce Touchstick/Guitar crossover (aka: "<em>the Bohlen-Box</em>")<br /> <br /> <strong>Theory</strong><br /> <a class="wiki_link_ext" href="http://www.huygens-fokker.org/bpsite/" rel="nofollow">Bohlen Pierce website</a><br /> <a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/Bohlen-Pierce_scale" rel="nofollow">Wikipedia Bohlen-Pierce scale</a><br /> <a class="wiki_link_ext" href="http://www.ziaspace.com/elaine/BP/The%20Bohlen-Pierce%20Scale.html" rel="nofollow">Bohlen-Pierce Scale Research</a> by Elaine Walker<br /> Sword, Ronald. "Bohlen Pierce Scales for Guitar" IAAA Press, UK-USA. First Ed: May 2009.<br /> <a class="wiki_link" href="/Intervals%20of%20BP">Intervals of BP</a><br /> <!-- ws:start:WikiTextHeadingRule:2:<h2> --><h2 id="toc1"><a name="The Bohlen-Pierce scale-Physical instruments tuned to the BP scale"></a><!-- ws:end:WikiTextHeadingRule:2 -->Physical instruments tuned to the BP scale</h2> <a class="wiki_link_ext" href="http://www.swordguitars.com/Sword_Bohlen_Pierce_acoustic.JPG" rel="nofollow" target="_blank">Bohlen Pierce guitar</a><br /> <a class="wiki_link" href="/microtonal%20clarinet#BPClarinets">Clarinets</a><br /> Metallophone<br /> Electronic Organ<br /> Stredici<br /> <!-- ws:start:WikiTextHeadingRule:4:<h2> --><h2 id="toc2"><a name="The Bohlen-Pierce scale-Compositions"></a><!-- ws:end:WikiTextHeadingRule:4 -->Compositions</h2> Links to available music written in BP at <a class="wiki_link_ext" href="http://www.huygens-fokker.org/bpsite/references2.html#anchor81501" rel="nofollow">above website</a>.<br /> <a class="wiki_link_ext" href="http://www.seraph.it/XenoTunes4_files/Bohl-en%20Roll.mp3" rel="nofollow">Bohl-en Roll</a> by Carlo Serafini<br /> <a class="wiki_link_ext" href="http://www.jeanpierrepoulin.com/mp3/BPguitares.mp3" rel="nofollow" target="_blank">Bohlen-Pierce electric guitar improvisation</a> by <a class="wiki_link_ext" href="http://www.jeanpierrepoulin.com/" rel="nofollow" target="_blank">Jean-Pierre Poulin</a><br /> <a class="wiki_link_ext" href="http://www.ronsword.com/sounds/BP_stretched_chroma.mp3" rel="nofollow" target="_blank">Bohlen-Pierce "Stretched Chroma" Acoustic Improvisation</a> by Ron Sword</body></html>