1. Minimal music is
a form of art music that
employs limited or minimal musical materials. In the Western
art music tradition the American
composers La Monte Young, Terry Riley, Steve
Reich, and Philip
Glass are credited with being
among the first to develop compositional techniques that exploit a minimal
approach. It originated in the New York Downtown
scene of the 1960s and was
initially viewed as a form of experimental music called the New York Hypnotic
School. As an aesthetic, it is marked by a non-narrative,
non-teleological, and non-representational conception of a work in progress,
and represents a new approach to the activity of listening to music by focusing
on the internal processes of the music, which lack goals or motion toward those
goals. Prominent features of the technique include consonant harmony, steady pulse (if not immobile drones), stasis or gradual transformation, and often
reiteration of musical phrases
or smaller units such as figures, motifs, and cells. It may include features such as additive process and
phase shifting. Phase shifting leads to what has been termed phase
music. Minimal compositions that rely
heavily on process techniques that follow strict rules are usually described
as process music.
https://en.wikipedia.org/wiki/Minimal_music
2. Phase music is
a form of music that uses phasing as a primary compositional
process. It is an approach to musical composition that is often associated with minimal
music, as it shares similar
characteristics, but some commentators prefer to treat phase music as a
separate category. Phasing is a compositional technique in which the same part (a repetitive
phrase) is played on two musical instruments, in steady but not identical tempi. Thus, the two instruments gradually shift out
of unison, creating first a slight echo as one instrument plays a little behind the
other, then a doubling with
each note heard twice, then a complex ringing effect, and eventually coming
back through doubling and echo into unison. Phasing is the rhythmic equivalent
of cycling through the phase of two waveforms as in phasing. Note that the tempi of the two instruments are
almost identical, so that both parts are perceived as being in the same tempo:
the changes only separate the parts gradually. In some cases, especially live
performance where gradual separation is extremely difficult, phasing is
accomplished by periodically inserting an extra note (or temporarily removing
one) into the phrase of one of the two players playing the same repeated
phrase, thus shifting the phase by a single beat at a time, rather than
gradually.
https://en.wikipedia.org/wiki/Phase_music
3. https://www.youtube.com/watch?v=KtE3e-z0Ro4&start_radio=1&list=RDKtE3e-z0Ro4
(Bruno Sanfilippo)
