This work presents variations on the opening 13 bars of 'Katikaze', now multi-
metered though still in 8th values throughout.  Again the source sequence,
Tribonacci summation mod 12, determines each measure's inital pitch class,
while a non-repeating series exrtracted from the current sequence member
onward determines the last eleven.

New here is a dual scheme for interval expansion, varying in kind between the
outer and inner series.  From the 1st-of-bar to next 1st, interval classes are
multiplied by a constant; within the bar they are additionally complemented or
compounded by a fixed number of octaves.  Movement headers announce the
expansion (IC factor ; 8va offset) in each variation.  Throughout, any resulting
pitch outside the piano range is replaced by a rest.

This score, revising for piano solo its auto-sequenced original of 2014, specifies
performance aspects (articulation most exhaustively), resetting most meters
and tempi.  It has one new movement -- in mixed meter, inserted as the work's
central #6.

The audio was created in Rosegarden via composer editing of LilyPond's default
MIDI output, converting the result then to PianoTeq's "Vintage Bosendorfer D4".

MOVEMENTS:
I. &nbsp;  &nbsp; &nbsp; 1 ; &nbsp;4 &nbsp; &nbsp; (IC factor ; &nbsp;8va offset)
II. &nbsp; &nbsp;-5 ; &nbsp;3
III. &nbsp; &nbsp;2 ; &nbsp;2
IV. &nbsp; -5 ; &nbsp;1
V. &nbsp; &nbsp; &nbsp;1 ; &nbsp;0
VI. &nbsp; &nbsp;3 ; &nbsp;*
VII. &nbsp; &nbsp;1 ; -1
VIII. -5 ; -2
IX. &nbsp; &nbsp;2 ; -3
X. &nbsp; &nbsp;-5 ; -4
XI. &nbsp;  &nbsp; 1 ; -5

- PMA

Takeoffs on 'Katikaze': Interval Expansion Study, Op. 17 (revised for piano solo)

Pairs & Singles: 17 mini-movements for solo piano.  Durations from 9" to 36"  total [9:36].   Scoring c/o LilyPond; audio-editing by composer c/o Rosegarden; performance c/o Pianoteq's "D4 Vintage Bösendorfer".

Patterns from the Game of Life, Part III: Pairs & Singles, Op. 30b

Peter McKenzie Armstrong

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