Audio Clip:

In Perpetuum... (2009)

12 percussionists

6 marimbas, 2 vibraphones, 2 xylophones, glockenspiel, chimes, timpani (26, 23, 20), bass drum, gong, cymbals, woodblock

Duration: 12 minutes

In Perpetuum... contains densely-scored blocks of sound alternating with silence and triadic harmony, and slowly-evolving passages of expressive melody, in fragmented form. The piece requires 12 percussionists who at times, play on six marimbas (two per instrument).