A binary opposition (also binary system) is a pair of related terms or concepts that are opposite in meaning. Binary opposition is the system of language and/or thought by which two theoretical opposites are strictly defined and set off against one another.^[1] It is the contrast between two mutually exclusive terms, such as on and off, up and down, left and right.^[2] Binary opposition is an important concept of structuralism, which sees such distinctions as fundamental to all language and thought.^[2] In structuralism, a binary opposition is seen as a fundamental organizer of human philosophy, culture, and language.

https://en.wikipedia.org/wiki/Binary_opposition

This is the way we see music…………