Ostinato in the context of "Passacaglia"

In music, a hexachord (also hexachordon) is a six-note series, as exhibited in a scale (hexatonic or hexad) or tone row. The term was adopted in this sense during the Middle Ages and adapted in the 20th century in Milton Babbitt's serial theory. The word is taken from the Greek: ἑξάχορδος, compounded from ἕξ (hex, six) and χορδή (chordē, string [of the lyre], whence "note"), and was also the term used in music theory up to the 18th century for the interval of a sixth ("hexachord major" being the major sixth and "hexachord minor" the minor sixth).

In music, the introduction is a passage or section which opens a movement or a separate piece, preceding the theme or lyrics. In popular music, this is often known as the song intro or just the intro. The introduction establishes melodic, harmonic or rhythmic material related to the main body of a piece.

Introductions may consist of an ostinato that is used in the following music, an important chord or progression that establishes the tonality and groove for the following music, or they may be important but disguised or out-of-context motivic or thematic material. As such, the introduction may be the first statement of primary or other important material, may be related to but different from the primary or other important material, or may bear little relation to any other material.

In music, groove is the sense of an effect ("feel") of changing pattern in a propulsive rhythm or sense of "swing". In jazz, it can be felt as a quality of persistently repeated rhythmic units, created by the interaction of the music played by a band's rhythm section (e.g. drums, electric bass or double bass, guitar, and keyboards). Groove is a significant feature of popular music, and can be found in many genres, including salsa, rock, soul, funk, and fusion.

From a broader ethnomusicological perspective, groove has been described as "an unspecifiable but ordered sense of something that is sustained in a distinctive, regular and attractive way, working to draw the listener in." Musicologists and other scholars have analyzed the concept of "groove" since around the 1990s. They have argued that a "groove" is an "understanding of rhythmic patterning" or "feel" and "an intuitive sense" of "a cycle in motion" that emerges from "carefully aligned concurrent rhythmic patterns" that stimulates dancing or foot-tapping on the part of listeners. The concept can be linked to the sorts of ostinatos that generally accompany fusions and dance musics of African derivation (e.g. African-American, Afro-Cuban, Afro-Brazilian, etc.).

Die Jakobsleiter (Jacob's Ladder) is an oratorio by Arnold Schoenberg that marks his transition from a contextual or free atonality to the twelve-tone technique anticipated in the oratorio's use of hexachords. Though unfinished by Schoenberg, the piece was ultimately completed and prepared for performance by Schoenberg student Winfried Zillig at the request of Gertrude Schoenberg.

Schoenberg began the libretto in 1914-15, which he published as a stand-alone text in 1917. He began the music in 1915, finishing most of his work on it in 1926, and finished a small amount of orchestration in 1944, leaving 700 measures at his death.

Music of the African diaspora is a sound created, produced, or inspired by Black people, including African music traditions and African popular music as well as the music genres of the African diaspora, including some Caribbean music, Latin music, Brazilian music and African-American music.

Music of the African diaspora was mostly refined and developed during the period of slavery. Slaves did not have easy access to instruments, so vocal work took on new significance. Through chants and work songs people of African descent preserved elements of their African heritage while inventing new genres of music. The culmination of this great sublimation of musical energy into vocal work can be seen in genres as disparate as Gospel Music and Hip-Hop. The music of the African diaspora makes frequent use of ostinato, a motif or phrase which is persistently repeated at the same pitch. The repeating idea may be a rhythmic pattern, part of a tune, or a complete melody. The banjo is a direct descendant of the Akonting created by the Jola people, found in Senegal, Gambia and Guinea-Bissau in West Africa. Hence, the melodic traditions of the African diaspora are probably most alive in blues and jazz.

A power trio is a rock band format having a lineup of electric guitar, bass guitar and drum kit, leaving out a dedicated vocalist or an additional rhythm guitar or keyboard instrument that are often used in other rock music bands that are quartets and quintets. Larger rock bands often use one or more additional rhythm sections to fill out the sound with chords and harmony parts.

Most power trios in hard rock and heavy metal music use the electric guitar player in two roles; during much of the song, they play rhythm guitar, playing the chord progression for the song and performing the song's important riffs, and then switching to a lead guitar role during the guitar solo. While one or more band members typically sing while playing their instruments, power trios in hard rock and heavy metal music generally emphasize instrumental performance and overall sonic impact over vocals and lyrics.

Latin jazz is a genre of jazz with Latin American rhythms. The two main categories are Afro-Cuban jazz, rhythmically based on Cuban popular dance music, with a rhythm section employing ostinato patterns or a clave, and Afro-Brazilian jazz, which includes samba and bossa nova.