This work investigates the harmonic and thematic potential of the musical interval of a second within a restricted instrumental framework. Composer Michael Berkeley explores how a singular, foundational musical interval can serve as the primary structural element for a composition. By limiting the instrumentation to two specific voices, the work demonstrates how minimalist constraints can generate complex and cohesive musical material.

Musicians and critics frequently note the technical precision required to balance the distinct timbres of the harp and oboe. Experts highlight this piece as a focused study in economy of composition and thematic development.