Original:   Helmut Lachenmann Lachenmann composed Salut Fr Caldwell for 2 guitars in 1977.
Revised:  What results is a snowstorm of quietly gliding paper airplanes as the audience returns them back and forth and so on. The exchange of sheets is experimentally beautiful, like the caring gesture toward the instrument as tended by Brecht.James Martin Harding and John Rouse (editors) Not the Other Avant-Garde: The Transnational Foundations of Avant-Garde Performance, University of Michigan Press, 2006, , Helmut Lachenmann Lachenmann composed Salut Fr Caldwell for 2 guitars in 1977.
Edit intent: meaning-changed