The term "octave" has been employed in literature with remarkable versatility, serving both as a precise musical term and as a personal name or affectionate address. In technical passages, authors use “octave” to denote musical intervals, registers, or the doubling of specific instruments—for example, describing a trumpet sounding an octave higher than usual ([1]), specifying limits within vocal ranges ([2], [3]), or detailing instrumental techniques such as doubling in the upper or lower octave ([4], [5], [6], [7]). At the same time, in works of fiction—particularly in Proust’s writings—“Octave” emerges as a character or a term of endearment, giving the word a humanized quality in phrases like “Madame Octave” or when referring to someone affectionately in dialogue ([8], [9], [10], [11], [12], [13], [14]). In this way, “octave” bridges the gap between the technical intricacies of music and the nuanced portrayal of characters, underscoring both precision and personal charm in literary expression.