Signal Flow is a work I composed in 2009 for percussion quartet. The piece is based on an interaction between amplified orchestral chimes and amplified snares that are feeding back. The 2 snare drums are placed between a microphone/speaker setup that is feeding back. This triggers the snares to resonate. At the same time two percussionists are playing and amplifying orchestral chimes. This brings out the harmonics of the orchestral chimes, which beat against each other as well as the feedback going through the snares. This beating causes the snares to pulsate at the frequency of the harmonic beating. On top of this, two performers play on harmonicas, changing their vocal formants as they play. The piece is bookended by a bass drum/tam-tam swell at the beginning and a woodblock roll at the end.

See the score on my website - sampluta.com