Eighty-one ninth chords
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Eighty-one 9th chords (2006) by Jacob Barton for two pianos tuned to [[17edo]] 1st program note: There are three types of thirds in 17-edo; let’s call them subminor (4/17-oct), neutral (5/17-oct), and supermajor (6/17-oct). If a ninth chord is composed of five notes separated by four thirds, then there are 3^4 = 81 of them in 17-edo. You will hear each of these once. Begin with the smallest — all subminor thirds — and end with the largest—all supermajor. The rhythm will help you keep track of the unfolding expansion. If you like the logic of this piece, I recommend the composer Tom Johnson. Program note: In Eighty-one ninth chords you will hear 81 ninth chords, each one a different type. I tried in the piece to let them be themselves but also connect them. Since composing it I read in //Born on a Blue Day// by Daniel Tammet (an autistic savant who sees and feels certain things when thinking about certain numbers) of nine as a number of particular immensity to him. This is exactly what it does here—phrases of length 2 or 8 feel even; 3 or 9 is ever a stretch. Recording here: http://www.archive.org/download/seventeenTPP_02/81_ninth_chords.mp3 Score here: [[file:81_9th_chords.pdf]]
Original HTML content:
<html><head><title>Eighty-one ninth chords</title></head><body>Eighty-one 9th chords (2006) by Jacob Barton<br />
<br />
for two pianos tuned to <a class="wiki_link" href="/17edo">17edo</a><br />
<br />
1st program note:<br />
<br />
There are three types of thirds in 17-edo; let’s call them subminor (4/17-oct), neutral (5/17-oct), and supermajor (6/17-oct). If a ninth chord is composed of five notes separated by four thirds, then there are 3^4 = 81 of them in 17-edo. You will hear each of these once. Begin with the smallest — all subminor thirds — and end with the largest—all supermajor. The rhythm will help you keep track of the unfolding expansion. If you like the logic of this piece, I recommend the composer Tom Johnson.<br />
<br />
Program note:<br />
<br />
In Eighty-one ninth chords you will hear 81 ninth chords, each one a different type. I tried in the piece to let them be themselves but also connect them. Since composing it I read in <em>Born on a Blue Day</em> by Daniel Tammet (an autistic savant who sees and feels certain things when thinking about certain numbers) of nine as a number of particular immensity to him. This is exactly what it does here—phrases of length 2 or 8 feel even; 3 or 9 is ever a stretch.<br />
<br />
Recording here:<br />
<br />
<!-- ws:start:WikiTextUrlRule:19:http://www.archive.org/download/seventeenTPP_02/81_ninth_chords.mp3 --><a class="wiki_link_ext" href="http://www.archive.org/download/seventeenTPP_02/81_ninth_chords.mp3" rel="nofollow">http://www.archive.org/download/seventeenTPP_02/81_ninth_chords.mp3</a><!-- ws:end:WikiTextUrlRule:19 --><br />
<br />
Score here:<br />
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