Recently I have written a series of pieces that are concerned in one way or another with the presentation of unique, and yet similar, events or objects. For example, in fifty objects (2007, for ensemble) and individual objects (2009, for orchestra), I made a sequence of unique musical objects that are closely related; forty objects (2007, for 40 electric guitars) has 40 independent parts; and in over 5000 individual works (2007, for piano) a single performance, or individual work, is one of 5040 versions of the piece.

forty works for Richard is an album-length series of 40 unique pieces that are closely related. I wanted to make a series of works that could be played in any order, using the random/shuffle function found on most playback devices, and in a prescribed order as is the case on a conventional album (or in shorter sequences of five pieces, for example).
There are 815,915,283,247,897,683,795,548,521,301,193,790,359,984,930,816 different permutations. I'm not going to list them.