Octave Unison vs. Unison: What’s the Difference and When to Use Each?
In music, ‘unison’ refers to two or more voices or instruments sounding the same pitch at the same octave, creating a single, blended line. ‘Octave unison’—more accurately termed octave doubling—involves performing the same melodic line at different octaves, enriching the texture with doubled overtones. This article explains the distinction, notational practices, performance implications, and practical guidance for choosing between them in composition and arrangement.
