Spazi Di Calabi (on old Jenco Vibraphone) by Joe Porter

This piece utilizes several cool compositional techniques:

1)Floating tonality: Sitting on what we think is I but then goes to Major III and sits on the III. The III then acts as a tonic and you don't really know what tonic is. This happens several times. III doesn't function as strongly as other chords. It's not really a pre-dominant like II or it isn't a Dominant like V or VII and it isn't really used a deceptive chord either. In this piece it acts as a floating chord as a tonic substitute.

2)Relative Minor Major chords: The very opening run is a Cmaj7 arpeggio. but then all the sudden your in A minor. Same sort of floating tonality concept.

3)Pitch displacement - Patterns get displaced changing the flow and feel. This mainly happens in the first half.

4)3 against 2 polyrhythm in the second half. "The Philip Glass Signature". Also the melody gets shifted into the left hand for certain moments.

5)2 tempo changes.

6)Small changes over time. Often in this piece specially the 3 against 2 section, it's neat how when you change 1 pitch it changes everything. This keeps happening like you morph into the progression.

7)Technically challenging. Playing this piece is interesting for me because the patterns that you play give your hands a certain feeling, effecting how you play the pattern.

8)Use of repetition. This piece is influenced by minimalism, however I would say it's more "technical"

9)Great composition use of melody lines that stick out over the patterns. I like how there are always atleast two levels in this piece.