Catherine Christer Hennix

Idrees Sulieman was an American bop and hard bop trumpeter.

Eric Allan Dolphy Jr. was an American jazz alto saxophonist, bass clarinetist and flautist. On a few occasions, he also played the clarinet and piccolo. Dolphy was one of several multi-instrumentalists to gain prominence in the same era. His use of the bass clarinet helped to establish the instrument within jazz. Dolphy extended the vocabulary and boundaries of the alto saxophone, and was among the earliest significant jazz flute soloists.

John William Coltrane was an American jazz saxophonist, bandleader and composer. He is among the most influential and acclaimed figures in the history of jazz and 20th-century music.

Fluxus was an international, interdisciplinary community of artists, composers, designers and poets during the 1960s and 1970s who engaged in experimental art performances which emphasized the artistic process over the finished product. Fluxus is known for experimental contributions to different artistic media and disciplines and for generating new art forms. These art forms include intermedia, a term coined by Fluxus artist Dick Higgins; conceptual art, first developed by Henry Flynt, an artist contentiously associated with Fluxus; and video art, first pioneered by Nam June Paik and Wolf Vostell. Dutch gallerist and art critic Harry Ruhé describes Fluxus as "the most radical and experimental art movement of the sixties".

Dick Higgins was an American artist, composer, art theorist, poet, publisher, printmaker, and a co-founder of the Fluxus international artistic movement. Inspired by John Cage, Higgins was an early pioneer of electronic correspondence. Higgins coined the word intermedia to describe his artistic activities, defining it in a 1965 essay by the same name, published in the first number of the Something Else Newsletter. His most notable audio contributions include Danger Music scores and the Intermedia concept to describe the ineffable inter-disciplinary activities that became prevalent in the 1960s.

La Monte Thornton Young is an American composer, musician, and performance artist recognized as one of the first American minimalist composers and a central figure in Fluxus and post-war avant-garde music. He is best known for his exploration of sustained tones, beginning with his 1958 composition Trio for Strings. His compositions have called into question the nature and definition of music, most prominently in the text scores of his Compositions 1960. While few of his recordings remain in print, his work has inspired prominent musicians across various genres, including avant-garde, rock, and ambient music.

Henry Flynt is an American philosopher, musician, writer, activist, and artist connected to the 1960s New York avant-garde. He coined the term "concept art" in the early 1960s, during which time he was associated with figures in the Fluxus scene. He later received attention for his anti-art demonstrations against New York cultural institutions in 1963 and 1964.

In music, just intonation or pure intonation is the tuning of musical intervals as whole number ratios of frequencies. An interval tuned in this way is said to be pure, and is called a just interval. Just intervals consist of tones from a single harmonic series of an implied fundamental. For example, in the diagram, if the notes G3 and C4 are tuned as members of the harmonic series of the lowest C, their frequencies will be 3 and 4 times the fundamental frequency. The interval ratio between C4 and G3 is therefore 4:3, a just fourth.