What is Music Theory?
Music theory is a practice musicians use to understand and communicate the language of music. Musical theory examines the fundamentals of music. It also provides a system to interpret musical compositions.
For example, basic music theory defines the elements that form harmony, melody, and rhythm. It identifies compositional elements such as song form, tempo, notes, chords, key signatures, intervals, scales, and more. It also recognizes musical qualities such as pitch, tone, timbre, texture, dynamics, and others.