Keys & Tonality

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.

Polytonality refers to the simultaneous sounding of two or more distinct tonal centers. It emerged as a compositional technique in the early twentieth century and remains a tool for creating complex harmonic textures.

A key signature is a set of sharps or flats placed at the beginning of a staff to indicate the scale and tonal center of a piece. It informs performers which notes are to be consistently altered throughout the work, reducing the need for repeated accidentals. Understanding key signatures is fundamental to reading, writing, and analyzing Western music.

The Circle of Fifths is a visual representation of the 12 pitch classes arranged by perfect fifths. It shows the relationship among key signatures, major and minor scales, and common chord progressions.