Enter your username and password

Forgotten your username or password?

Your Shopping Cart

There are no items in your shopping cart.

Pi (Obstruction)

Sheet Music: Score

Pi (Obstruction) : for toy piano / Andrián Pertout

by Andrián Pertout (2008)

  • Purchase Price: $48.18 (Usually ships in 3-8 business days) — Add to Cart
  • Library Availability: Q 786.2/PER 1 — Available for loan
  • Instrumentation: 3-octave toy piano.
  • Digital Library -- View full score online

    Not a member? Become a member online and access the Digital Library immediately
  • Audio Sample

    Performance by Phyllis Chen from the CD A borboleta


Add to Cart

Usually ships in 3-8 business days

Shipping Info

Product details

Pi (Obstruction) for Schoenhut Concert Grand (Model 379, 37-key) was commissioned by American pianist Phyllis Chen and represents a Hommage à Conlon Nancarrow (1912-1997). The title is in reference to the I Ching, or 'Book of Changes' - originating in the Western Zhou Dynasty (1122-771 BC) - and highlights hexagram 12 (incorporating the trigrams of energy and space) from the 64 hexagrams of the oracle. In the tradition of American composer, pianist and theorist Henry Cowell (1897-1965) and his monumental publication of New Musical Resources (1930), the work explores a variety of compositional techniques developed during the twentieth century by American experimentalist composer Conlon Nancarrow and documented by Kyle Gann in The Music of Conlon Nancarrow (1995). The two possible transpositions of the whole-tone scale are adopted in juxtaposition as the basic pitch material, while the simple seven-limit frequencies ratios associated with this hexatonic scale form the basis for rhythmic development: unison (1/1), just major tone (9/8), just major third (5/4), septimal subdiminished fifth (7/5), just minor sixth (8/5), septimal subminor seventh (7/4), and octave (2/1). The compositional structure features tempo canons (or diminution canons, expressed as polyrhythmic ratios), as well as an isorhythm constructed from a talea (rhythmic series) of 16 notes (3+4+5+4=16, 4+5+6+5=20, 5+6+7+6=24, and 6+7+8+7=28) and a color (pitch series) of 12 notes (F4, B4, G4, C sharp 5, F4, B3, G3, C sharp 4, F3, B4, G4, and D sharp 4) - the form requiring four repeats of the melodic pattern and three repeats of the rhythmic pattern for a completion of the cycle (48 notes).

Published by: Australian Music Centre — 1 facsimile score (28p. -- B4 (landscape))

Difficulty: Advanced — Professional

Duration: 5 mins, 46 sec.

Dedication note: Hommage à Conlon Nancarrow (1912-1997)

Commissioned by Phyllis Chen.

First performance by Phyllis Chen — 20 Sep 09. Performance at the 11th Annual World Music Festival: Chicago, Preston-Bradley Hall, Chicago Cultural Center, Chicago, IL, USA

Composer's no.: 401.

Includes programme notes and performance notes.

The composer cites as influences on this work: Henry Cowell (1897-1965) and his monumental publication of New Musical Resources (1930) ; Kyle Gann's The Music of Conlon Nancarrow (1995) ; I Ching, or ‘Book of Changes’ ; Tempo canons ; Isorhythm.

Typeset edition.

ISMN: 979-0-67309-774-2

Related products

This work is also available in the following products:

A borboleta
CD: A borboleta / music composed by Andrián Pertout.

This work also exists as the following versions:
- Solo Other Keyboard
- Duos: 2 Vibraphones


- Browse other works for Solo toy piano

- Browse other works by Andrián Pertout

User reviews

Be the first to share your thoughts, opinions and insights about this item.

To post a comment please login