Explore Keys & Tonality with music dictionary guides to key signatures, tonic notes, major and minor keys, and tonal centers.
Relative major and minor keys are pairs of major and minor scales that share the same key signature, such as C major and A minor. To find the relative minor of a major key, count down three semitones (or a minor third) from the tonic; to find the relative major of a minor key, count up three semitones (or a minor third) from the tonic. This relationship forms a cornerstone of tonal music theory and analysis.
Polytonality is the simultaneous use of two or more distinct musical keys, while bitonality specifically involves two keys. These techniques, prominent in early 20th-century music, create rich, dissonant textures that challenge traditional harmonic expectations. This article explores their differences, historical context, notation, notable works, and lasting influence on composers and genres.
The key signature is a notational device that indicates the scale used in a piece, while the tonal center is the perceptual pitch around which all musical materials gravitate. They are related but not synonymous; a key signature may imply a tonal center, but the actual center is determined by harmonic and melodic context. Understanding the distinction is essential for analyzing and performing music accurately.
The tonic is the first scale degree and tonal centre of a key, serving as the point of rest and resolution in tonal music across genres.
In music theory, the dominant is the fifth scale degree and the chord built on it, creating a strong pull toward the tonic. It is a fundamental harmonic function that shapes tension and resolution in tonal music.
In tonal music, the subdominant is the chord built on the fourth scale degree, serving as a primary harmonic function that prepares the move toward the dominant or returns to the tonic.
In music, a key designates a group of pitches, chords, and related harmonic relationships centered on a tonic note. It provides the tonal framework for a piece, influencing its mood, structure, and melodic direction.
Modulation is the process of changing from one tonal center or key to another within a piece of music. It reshapes harmonic relationships, creates contrast, and drives musical narrative across many styles.
Atonality is a compositional approach that deliberately avoids establishing a key centre, emerging in the early twentieth century and reshaping modern music theory and practice.
In music theory, the relative major of a minor key shares the same key signature but starts on the third scale degree. Understanding this relationship helps musicians navigate key changes, compose, and analyze tonal music.