Explore Music Theory with clear music dictionary guides to notes, scales, chords, rhythm, harmony, melody, and musical structure.
A plagal cadence is a harmonic progression that moves from the subdominant (IV) to the tonic (I) chord, often heard at the end of hymns and folk songs. It creates a softer, more gentle resolution than the dominant‑tonic authentic cadence.
A chord is a simultaneous sounding of three or more distinct pitches, creating harmony in Western music. Chords serve as the building blocks of progressions, shaping the emotional contour of a piece.
The chromatic scale is a musical scale consisting of twelve successive pitches, each a semitone apart. It is used in various musical styles for melodic and harmonic color, and forms the basis of chromaticism in Western music.
Syncopation is a rhythmic device that places emphasis on normally weak beats or off‑beats, creating tension and forward momentum. It is a fundamental element in many musical styles, from classical to jazz and popular music.
A measure, also called a bar, is a segment of musical time defined by a set number of beats and bounded by bar lines. It organizes rhythm, supports notation, and underpins meter in virtually all Western music.
Meter is the recurring pattern of strong and weak beats that organizes musical time into measures. It is notated with a time signature and forms the backbone of rhythmic structure across virtually every musical style.
The Locrian mode is the seventh of the seven traditional diatonic modes, characterized by a diminished fifth and a flattened second. It is the most unstable of the modes and is rarely used as a tonal center, but appears in modern classical, jazz, and metal contexts.
A beat is the basic unit of time in music, supplying the steady pulse that underlies rhythm and tempo. Explore its origins, applications across styles, and its musical importance.
An extended chord is a harmony that adds tones beyond the seventh—such as ninths, elevenths, and thirteenths—to create richer color and tension in music.
The octatonic scale is an eight‑note symmetric scale built from alternating whole and half steps. It appears in classical, jazz, and film music, offering a rich source of tension and colour.