The fourteen-tone series on which the melody "Libra" from Karlheinz Stockhausen's Tierkreis is based. (From p. 151 of Jerome Kohl, "The Evolution of Macro- and Micro-Time Relations in Stockhausen's Recent Music", Perspectives of New Music 22, nos. 1 & 2 (Fall-Winter 1983/Spring-Summer 1984): 147–85.)
Chord progression (half note open guitar chords) for the widely recorded ragtime influenced song written in 1923 by Jimmy Cox, "Nobody Knows You When You're Down and Out". It features chromaticism through chains of secondary dominants (III = V/V/V/V = V/vi, VI = V/V/V = V/ii, II = V/V, and V) and a secondary diminished seventh chord (viio7/V=♯IVo7).
Double harmonic scale with quarter tones. Created by Hyacinth (talk) 07:11, 10 March 2010 using Sibelius 5. MIDI pitch bend appears to match intervals.
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.
Dl0ksc in cw qso of mar 10th, 2012, at 11. 50 utc on 10116 khz. Stable high frequency but multiple tone - spectrum. Audio frequency changes are due to my tuning of trx to hear multiple tone.