The phrase “i wonder why avery satb” appears to be an inquiry potentially related to a choral arrangement by a composer or arranger named Avery, written for a four-part choir: Soprano, Alto, Tenor, and Bass (SATB). Without further context, it implies a question regarding some aspect of such a piece. For example, the inquiry might pertain to the harmonic choices, the melodic writing for a specific voice part, or the overall structure of the arrangement.
Understanding the composition or arrangement in question, and the specific concern behind the inquiry, necessitates an analysis of the musical score. Historical context of the piece, composer, and performance practice may shed light on stylistic elements. A critical listening of the performance is valuable to understand the aural impact of the arrangement.
