Train Filter (2005)
This piece uses GrainPIC to control filters over a sample of Broadway mid-morning traffic in NYC. Each filter is described by a cloud, which sets a resonant high pass filter and a resonant low pass filter, creating a resonant bandpass filter. The 1/q of each filter moves towards 1 as the cloud is played. The pitches of the filters move towards pitches in the Bohlen-Piece scale. The envelopes on each moment of filtering obscure the traffic sounds, so instead a train sound is evident.