Takeoffs on 'Katikaze': Interval Expansion Studyrevised for piano solo[3:40]COMPOSITION
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 modulo 12 -- determines each measure's initial pitch class, while a non-repeating series extracted 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 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.
PERFORMANCE
Each slur indicates articulation, not phrasing. Its end-note is to be curtailed sufficiently to provide articulative silence before the next event (be that note or rest). Any slur-synchronized pedalling must respect this.
Abrupt pivots in large-interval direction may frequently require hand crossing (e.g., movement 3, measure 2, with the left hand taking extremities).