Alluvium was written for Catherine Lee in the Summer and Fall of 2016. The title refers to the sand and rock materials that move through bodies of water, changing the shape and form of shorelines over long periods of time.
The title relates musically to a concept called microtonal drift, which occurs when modulating to different keys in an extended just intonation context, causing the tonic note to gradually drift away from equal temperament. For example, a modulation to the natural seventh is nearly a third of a semitone flat from equal temperament, meaning that a sequence of modulations to the seventh will drift further away from equal temperament with each modulation. In this piece, the tape part plays a series of precisely tuned microtonal modulations that gradually drifts the harmony from an E-flat tonal center to a D tonal center over the course of the entire piece, spiraling through unfamiliar. harmonic territory all along the way.
This solo oboe d’amore part is notated in an unusual manner, using proportional notation and suggestive shapes and illustrations combined with more conventional notation. Throughout the score, a good deal of room for improvisation and choice is allowed for and each performance will be significantly different in detail while retaining overall dramatic curve.
Recording Notes
Recorded, engineered, and mastered by Josh Powell at The Map Room, Portland, Oregon
mixed by Taylor Brook