defines musical form as "a series of strategies designed to find a successful mean between the opposite extremes of unrelieved repetition and unrelieved alteration."
describes form through repetition
and difference: difference is the distance moved from a repeat; a repeat being the smallest difference.
"Form is a theatrical event of a certain length, and the length itself may be unpredictable."
"There is an idea, the basis of an internal structure, expanded and split into different shapes or groups of sound constantly changing in shape, direction, and speed, attracted and repulsed by various forces. The form of the work is a consequence of this interaction. Possible musical forms are as limitless as the exterior forms of crystals."
"'Form' has always come into being in a dialogue between particular 'instances' and the larger body of work, or 'tradition.'"