In music theory, what is a leading note?

A leading note is specifically defined as the seventh degree of a scale, particularly in the context of major and melodic minor scales. This note has a strong tendency to resolve upwards to the tonic, which is the first scale degree. For instance, in the C major scale, the leading note is B, leading resolutely to C.

This resolution creates a sense of tension and anticipation, making the leading note crucial for establishing harmonic progression and tonal relationships in music. It plays a key role in resolving musical phrases and contributing to the overall sense of direction in a piece.

Understanding the concept of the leading note is essential for grasping broader harmonic principles and how melodies function within a given key.