Takeoffs on 'Katikaze' (Armstrong, Peter McKenzie)

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PMA (2014/10/28)

Performer Pages Peter McKenzie Armstrong (Rosegarden & Pianoteq)
Publisher Info. Edition Ottaviano Petrucci
Copyright
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TN-Takeoffs on Katikaze.jpg

Sheet Music

Scores

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PMA (2014/10/28)

Publisher. Info. Edition Ottaviano Petrucci
Copyright
Misc. Notes Engraved with LilyPond 2.18.2
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General Information

Work Title Takeoffs on 'Katikaze'
Alternative. Title An Interval Expansion Study
Composer Armstrong, Peter McKenzie
I-Catalogue NumberI-Cat. No. IPA 25
Movements/SectionsMov'ts/Sec's 10
Year/Date of CompositionY/D of Comp. 2014
Average DurationAvg. Duration 2-3 minutes
Composer Time PeriodComp. Period Modern
Piece Style Modern
Instrumentation autopiano

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Composition Notes

This work presents variations on the opening 13 bars of Katikaze, still in 12/8 meter and
with 8th-note motion throughout.   Again, the source sequence -- tribonacci summation in
mod 12 -- determines each measure's initial pitch default, while a non-repeating series
extracted from the current sequence member onward determines the last eleven.

New here is a dual scheme of interval expansion, varying in kind between the outer and
inner series.   From 1st-of-bar to next 1st, interval defaults are multiplied by a constant;
within the bar, they are additionally complemented or compounded by a fixed number of
octaves.   Each resulting pitch that exceeds the piano range is replaced with a rest.

The score indicates after movement numbers the interval-class expansions (factor;8vas)
for each variation.  Despite its often extreme ranges, I have avoided ottava pitch notation,
preferring instead to keep qualitative distances vivid.

- PMA