Machine #7

This is a new piece that works with tetrads (4 note chords) derived from the 31-limit tonality diamond. They are either played alone, or other tetrads are glided or trilled up or down to reach the target tetrad. For example, one tetrad is made from the 4:5:6:7 chord. It might be played alone, or another tetrad, perhaps one based on 9:11:27:31 is used to glide to the 4:5:6:7 tetrad. The 16 tone utonality or otonality scales include otonal scales based on 16:9, 4:3, and 1:1, and the utonal scales originate on 9:8 or 5:4. The two additional tetrads are based on 17:21:25:29 and 13:15:19:23. Utonal tetrads are mirrors of these. These are slightly different from the ones I used in People, in order to ensure that all four have nice sounding chords.

The rhythm shifts around a bit, and the randomness also changes from ostinati to drunkard’s walk, to pure random.

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Machine #7

Published by

Prent Rodgers

Musician seduced into capitalism.