The environmental music piece Music for Wilderness Lake was written 35 years ago by Canadian composer R. Murray Schafer. It's a work for twelve trombones with accompaniment by the wildlife that happens to be in the environment.
Music for Wilderness Lake has traditionally been performed by a dozen trombonists arranged around a body of water, signaled by a director on a dock or in a boat. In the case of this Austin performance, the signaling will be done from a handmade canoe built by Austin woodworker Aldo Valdés Böhm.
The performance is in two parts, one at dusk (which should be around 8:15) on Friday night and one at dawn (or around 6:30) on Saturday morning. The experience of the music will vary depending on where one stands and on how loud the local birds and bullfrogs decide to be. It's produced by the Contemporary Austin and will be performed at their Laguna Gloria location. It's free and open to the public.