Hurley's wholly instrumental pieces play at the edges of perception working at the limits of what can be detected in fine changes of volume, tamber, or pitch.
Hurley's wholly instrumental pieces play at the edges of perception. This perception is working at the limits of what can be detected in fine changes of volume. This perception is working at the limits of what can be detected in fine changes of tamber. This perception is working at the limits of what can be detected in fine changes of pitch.