Britten's twelve-tone 'Screw' theme [4]divides into equivalent tetrachords, each a segment of the circle of fifths: D-A-E-B, F#-C#-G#-D#, Bb-F-C-G. Created by Hyacinth (talk) 03:10, 7 January 2012 (UTC) using Sibelius 5.
Traditional Pythagorean tuning of the diatonic tetrachord. Created by Hyacinth (talk) using Sibelius 5. MIDI pitch bend appears to match intervals (0,64, 96,62, 64,61, and 80,64).