A thirteenth chord "collapsed" into one octave results in a dissonant, seemingly secundal[1] tone cluster. Created by Hyacinth (talk) 22:18, 5 July 2009 using Sibelius 5.
24-tet scale on C (50 cent steps). Easley Blackwood, Jr.'s notation for 24 equal temperament. As only "ups" are used, there are no three-quarter flats and quarter flats are enharmonically spelled (Dd = C#↑). Pitches are split into two groups of 12. MIDI pitch bend is correct for intervals.
5 25 {\displaystyle {\sqrt[{25}]{5}}} = 5:11/25 = 111.45 cents. Interval used in Stockhausen's Studie II, a compound just major third (5/1) divided into 25 equal parts.
Bridge chord, named after en:Frank Bridge. Minor chord with a major chord a whole tone above. Chord pictured followed by arpeggio with D major at the octave.
Harmonic seventh chord on C. Equal tempered major chord with quarter tone flat minor seventh (950 cents). Created by Hyacinth (talk) 18:56, 10 November 2011 with Sibelius 5.