Question

what is the music theory how is it used​

Answer 1

Answer:

The theory, which models musical transformations as elements of a mathematical group, can be used to analyze both tonal and atonal music. The goal of transformational theory is to change the focus from musical objects—such as the "C major chord" or "G major chord"—to relations between objects.

Explanation:

Music theory examines the elements that construct a piece of music, including notation, key signatures, time signatures, and chord progressions. Many teachers will insist that music theory is a fundamental tenet of a balanced music education and may even include theory as part of their lessons.

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Answer 2

Answer:

Music theory is the study of the practices and possibilities of music. ... Music theory is frequently concerned with describing how musicians and composers make music, including tuning systems and composition methods among other topics.