Progressive rock is a subgenre of rock music that emerged in the late 1960s, noted for its complex structures, extended compositions, and incorporation of classical, jazz, and electronic elements. It emphasizes virtuosity, thematic concepts, and experimental approaches to songwriting.
A secondary dominant is a chord that temporarily tonicizes a scale degree other than the tonic by treating it as if it were the dominant. It enriches harmonic motion by creating brief tonal pulls toward non‑tonic chords.
In music, an exposition is the opening section of many large-scale forms, most famously the sonata, where primary themes and key areas are presented before development.
A bar line is a vertical line on a musical staff that divides the staff into measures, indicating the regular rhythmic grouping defined by the time signature. It helps performers keep tempo, locate places in the score, and signals structural boundaries such as phrase ends or repeats.
The Baroque Era (c. 1600–1750) was a period of dramatic, ornate music marked by the rise of tonal harmony, basso continuo, and expressive contrast. It laid the groundwork for modern Western art music.
Dissonance is a musical interval, chord, or sonority that creates a sense of tension or instability, often prompting a resolution to a more stable, consonant sound. It plays a central role in shaping harmonic progressions, emotional expression, and stylistic identity across many musical traditions.
The major sixth is a musical interval spanning nine semitones, known for its warm, consonant quality. It appears in melodies, harmonies, and chord structures across many musical styles.
A refrain is a recurring line or phrase in a song that returns at regular intervals, often providing a lyrical and melodic anchor. It differs from a chorus in length and function, and is a fundamental element of many musical forms.
A minor chord is a three‑note harmony built from a root, a minor third, and a perfect fifth. It provides a darker, more melancholic sound than its major counterpart and is fundamental to Western tonal music.
A flanger is a time‑based audio effect that mixes a signal with a slightly delayed copy, creating sweeping, jet‑like comb‑filter textures.