This track is an excerpt recording from an audio installation by Shawn Greenlee, running Feb. 20 - March 15, 2009 at the RISD Museum (Faculty Biennial) in Providence, RI.Occasions produces subtle interactions of delicate, synthetic tones mediated by the resonance of space and the reception of the listener. It is a long form, audio-installation utilizing a 12-channel speaker array to project sound in an exhibition space. Each of the twelve speakers produces a unique sine wave gliding between established frequencies. The twelve speakers are divided into two groups which move asynchronously thus creating a fluctuation in acoustic and psychoacoustic phenomena as the glissandi interact. When listening, what one will notice most obviously are several beating frequencies and difference tones - and that the perception of these is in large part due to where the listener positions herself in relationship to the speakers.