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.
To create this sound, i created a sinusoid of 500 hz and an amplitude of 0. 8. I then multiplied the speed of 0. 750. To get this final sound is to duplicate the sinusoid several times.