“Tre Caleidocicli” for instrumental group (1991), the “Ottotonico”
first one for 8 instruments is harmonically built upon the (0,1,3,4,7,9)
chord; hence there develops a five-voice canon with tritone entries, while
one independent voice develops the tone-semitone (octotonic) scale. The
transposition grades form a three-figure series: 4-2-3.
second one, for 8 instruments, is built canonically upon a
(0,1,2,3,4,5,6,7) chromatic eight- sound chord . The transposition
grades form a series of 21 figures
(1-2-11-3-10-4-9-5-8-6-7-7-6-8-5-9-4-10-3-11-2) given by the intersection of
all the intervals in a rising order and of all the intervals in a descending
order, developing upon three 7/8 measures. The 8 voices expose a canon of
which the entries are at the inferior semitone.
The “Sintetico” third
one, for two 6-instrument groups, is built upon two different six-note
chords: (0,1,3,4,7,9,) and its opposite (0,1,3,5,7,9). The 6 voices of the
first group unfold a inverted canon to the other 6; the canon entries are
placed inversely along the axis of an augmented triad. The transposition
grades form a series of six figures (6-3-1-7-11-4), deriving from the
common-notes among the chord transpositions.
Recording effected in
Adria, Teatro Comunale,Ensemble of the Adria Conservatoire, Conductor: Ambrogio De
Palma (13/6/91). Agenda Edizioni, Bologna (1999).