Island chords
IMPORTED REVISION FROM WIKISPACES
This is an imported revision from Wikispaces. The revision metadata is included below for reference:
- This revision was by author genewardsmith and made on 2011-07-26 18:39:43 UTC.
- The original revision id was 242963705.
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Original Wikitext content:
The island tetrad is an [[Dyadic chord#Essentially tempered dyadic chords|essentially tempered dyadic chord]] which under octave reduction consists of three 15/13 intervals followed by a 13/10, which closes on the octave since the island comma, 676/675, is tempered out; in other words a 15/13-15/13-15/13-13/10 chord. It can also be viewed as an island tempered version of 1-15/13-4/3-20/13. Contained within it are a barbados triad, the 1-13/10-3/2 chord, and an island triad, the 1-15/13-4/3 chord, which in another position is the 1-3/2-26/15 chord.
Original HTML content:
<html><head><title>island tetrad</title></head><body>The island tetrad is an <a class="wiki_link" href="/Dyadic%20chord#Essentially tempered dyadic chords">essentially tempered dyadic chord</a> which under octave reduction consists of three 15/13 intervals followed by a 13/10, which closes on the octave since the island comma, 676/675, is tempered out; in other words a 15/13-15/13-15/13-13/10 chord. It can also be viewed as an island tempered version of 1-15/13-4/3-20/13. Contained within it are a barbados triad, the 1-13/10-3/2 chord, and an island triad, the 1-15/13-4/3 chord, which in another position is the 1-3/2-26/15 chord.</body></html>