Alessio Silvestrin

ITO for piano

Ken’ichi Nakagawa, piano

ITO for piano, composed by Alessio Silvestrin and performed by Ken’ichi Nakagawa, elaborates 2 scales each conceived as a concatenation of 5 asymmetric trichords, for a total of 15 notes and combined to Fibonacci numeric sequences. These scales are intended as segments of the piano keyboard divided into sections which by collecting groups of selected notes through Fibonacci numeric sequences are applying serial systems related to different parameters such as pitches, durations and dynamics. The 5 asymmetric trichords are then redistributed with an intervallic distances which the entire register of the piano keyboard.
This composition is divisible in 2 sections of the same amplitude and exactly mirroring each other.
The 1st section of the composition uses scales of asymmetric trichords by presenting the second note of the trichord lowered of one semitone.
The notes in scale of asymmetric trichords, alternates groups of notes with the insertion of pauses duration corresponding to 1/32 of quarter note. These scaled segments are established by virtue of the Fibonacci numeric sequence comprising the values from 1 to 13 (1-1-2-3-5-8-13) and ordered in a system that reworks the same Fibonacci sequence in a retrograde 13 to 1 (13-8-5-3-2-1-1) resulting in the following mixed order:
The 2 Fibonacci numerical sequences alternate quantity of notes and pauses worth demisemiquaver.
After the episode in which used asymmetric trichords in of scales bichords interpolated by pauses of different durations, also corresponding to various combinations in relation to the Fibonacci numbers, the composition continues with the prevalence of pitches of duration and dynamic, sorted in the range of the entire the keyboard and highlighting the overlap of the frequencies, weaving a sort of a Tricordale harmonic texture.
Ito translated from Japanese in effect means: thread.
The 2nd and final section, continues exactly as the 1st section, using the same Tricordale asymmetric entity with the second note of one semitone higher, thus giving a spontaneous balance to the total form of the composition.

ITO has been composed for the choreography ORIME NO UE by Alessio Silvestin,
created with Noism 1 Ryutopia Niigata-City Perfirming Art Center in Niigata, 27.05.2011.