This obscuration is an instance of the midi used to realize a cover of popular show tune.

Nowhere (Obscuration VII)

This obscuration instantiates the midi from a Real Book standard.

Black Bossa (Obscuration III)

The symmetric difference of two sets consists of all those elements that are in one of the sets, but not in both.  The resulting set is the union of the sets with the intersection removed.

The symmetric difference (symdiff) is a binary operation on the power set of a given set.  It is possible to take the symdiff of a collection of sets, and the intersection of an odd number of sets is a subset of their symdiff. Thus, for example, if the sets are musicians, mathematicians, and programmers, I am not in the symdiff of any two of them, yet I am in the symdiff of all three. Or at least, I want to be.

New tracks tagged #Obscuration