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Well, since Darmstadt, I’ve written two pieces.
One in the course of a fifteen-minute TV program in
Cologne. The other is Music Walk, written
during two hours in Stockholm. Neither piece uses
chance operations. The indeterminacy in the case
of Music Walk is such that I cannot predict at all what
will happen until it is performed. Chance
operations are not necessary when the actions that
are made are unknowing. Music Walk consists of
nine sheets of paper having points and one without
any. A smaller transparent plastic rectangle
having five widely spaced parallel lines is placed
over this in any position, bringing some of the
points out of potentiality into activity. The
lines are ambiguous, referring to five different
categories of sound in any order. Additional
small plastic squares are provided having five
non-parallel lines, which may or may not be used to
make further determinations regarding the nature of
the sounds to be produced. Playing positions are
several: at the keyboard, at the back of the
piano, at a radio. One moves at any time from
one to another of these positions changing thereby
the reference of the points to the parallel lines.
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