PURPOSE: To illustrate the audio analog to the "spiral staircase" effect.

DESCRIPTION: This tape contains stepwise upward and downward Shepard's tones.

SUGGESTIONS: See other examples of Shepard's tones in our library: (1) Audiotape "Voice of the Computer" contains Shepard's tones and an electronic music composition using the downward glissando Shepard's tones: Computer Suite from "Little Boy," by Jean-Claude Risset. The later is also available on CD. (2) Videotape "A Pair of Paradoxes" simultaneously presenting stepwise Shepard's tones while a ball jumps around the spiral staircase.

REFERENCES: (PIRA unknown.)

EQUIPMENT: Cassette with player.

SETUP TIME: None.