Composer/Sound Artist Howard Sandroff and clarinetist John Bruce Yeh began their collaboration in 1989 by realizing the computer controlled pre-recorded spatialization of Dialogue de l'ombre double by Pierre Boulez. In 1992 Yeh and Sandroff were invited by Maestro Boulez and the Los Angeles Philharmonic to perform Dialogue at the Ojai Festival in California. Their numerous performances, throughout the United States and abroad, of this monumental work was the first realized outside of the Paris-based Ensemble Intercontemporain and the technical resources of the Institut de recherche et coordination acoustique/musique (IRCAM).
Lauded by critics from the Los Angeles Times, Chicago Tribune, New York Times and the Wall Street Journal, Yeh and Sandroff set out to build an entire program using the complex computer controlled audio processing system required for Dialogue. The first addition to their repertoire was Sandroff's Tephillah, commissioned by Yamaha Corporation of America for John Bruce Yeh and completed in 1990. The second, Ancient Devices by Matthew Malsky, written for Sandroff and Yeh was completed in 1993. Yeh and Sandroff have recorded Dialogue and Tephillah for a 1996 Compact Disc Release from Koch International Classics.