Variations II (1961)

The materials for this work consist of 5 small transparencies with a single point on each, and 6 larger transparencies with one line on each. These may be superimposed in any way, creating a configuration of points and lines, to be interpreted as a way of producing sounds. This is achieved by dropping perpendiculars from the points to all of the lines (creating a total of 30 perpendiculars). Measurements of the perpendiculars are used to obtain readings for frequency, amplitude, timbre, duration, points of occurrence within the established period of time, and structure of the event (number of sounds).