Extended techniques in the context of "Prepared piano"

In music, notes are distinct and isolatable sounds that act as the most basic building blocks for nearly all of music. This discretization facilitates performance, comprehension, and analysis. Notes may be visually communicated by writing them in musical notation.

Notes can distinguish the general pitch class or the specific pitch played by a pitched instrument. Although this article focuses on pitch, notes for unpitched percussion instruments distinguish between different percussion instruments (and/or different manners to sound them) instead of pitch. Note value expresses the relative duration of the note in time. Dynamics for a note indicate how loud to play them. Articulations may further indicate how performers should shape the attack and decay of the note and express fluctuations in a note's timbre and pitch. Notes may even distinguish the use of different extended techniques by using special symbols.

Robert Reynolds Ashley (March 28, 1930 – March 3, 2014) was an American composer, who was best known for his television operas and other theatrical works, many of which incorporate electronics and extended techniques. His works often involve intertwining narratives and take a surreal multidisciplinary approach to sound, theatrics and writing, and have been continuously performed by various interpreters during and after his life, including Automatic Writing (1979) and Perfect Lives (1983).