David Mooney was born 1949 in Newport News, Virginia, USA. In the mid-sixties through college, I experimented with various kinds of tape manipulation. After college, I digressed for two decades through writing and visual arts before returning to music in the early 1990s. Completed an introductory course in electronic music with Pablo Ortiz at the University of Pittsburgh in 1993. Otherwise, I am a self-taught composer of computer music. Performances include the New Electroacoustic Music concert of the 1998 Music on the Edge series at the University of Piftsburgh; a pre-opening concert at the Electronic Music Foundation's Engine 27 performance space in New York in 1999; the International Computer Music Conference in Beijing (ICMC99); and a 1999 broadcast on the Works from the Fringes of Sonic Expression show on WMBC, Baltimore. Screws in Their Shoes 4'26": This is one of a projected set of 24 short pieces based on the rhythmicon. Leon Theremin built the rhythmicon inl931 for Henry Cowell as a vehicle for Cowell's exploration of the relationship of rhythm to the harmonic series. Using a keyboard, a performer could sound any combination of the first sixteen tones of the harmonic series. The tones beat rhythmically according to the intervals of the tones, so that for each beat of the fundamental the second harmonic beat twice, the third harmonic three times, etc. Using the Kyma system, I've created a "virtual rhythmicon environment" that extends the concept up through the 24 th harmonic. In this piece, number 19 of the series, beats emerge from a cold sonic soup only to sink again into the obscurity of amorphous sound.