Ruth Crawford Seeger (July 3, 1901 – November 18, 1953), born Ruth Porter Crawford, was a modernist composer and an American folk music specialist.

In the twenties and early thirties, Crawford Seeger wrote atonal works influenced by Alexander Scriabin. These works favored dissonance and post-tonal harmonies; they also utilized irregular rhythms and metres. Her technique may have been influenced by the music of Schoenberg, although they met only briefly during her studies in Germany. She was encouraged and guided by her teacher-then-husband Charles Seeger's dissonant counterpoint, as well—and also developed her own methods of composing.

Ruth Crawford was born in East Liverpool, Ohio, and began her music education at age 6 with her first piano lesson. Later she studied with her mother. She studied with Madame Valborg Collett later on, who was a student of Agathe Grøndahl. Later, she continued at the American Conservatory of Music in Chicago with Heniot Levy and Louise Robyn. She learned composition from Adolf Weidig, whose instruction accelerated her skill. But her study under Djane Lavoie Herz, a disciple of Scriabin, was important for the social and intellectual world it opened for her. During this time, she met Cowell, Rudhyar, and the leading Chicago poet Carl Sandburg whose writings she eventually set to music.

Dawn Upshaw (born July 17, 1960) is an American soprano described as "one of the most consequential performers of our time" by the Los Angeles Times.^{[citation needed]} The recipient of several Grammy Awards and Edison Prize-winning discs, Upshaw is at home both in opera and art song, and in repertoire from Baroque to contemporary. Many composers, including Osvaldo Golijov, John Harbison, Esa-Pekka Salonen, John Adams, and Kaija Saariaho, have written for her, and her artistic achievements are extensive. In 2007 she was awarded a MacArthur Fellowship.

Upshaw was born in Nashville, Tennessee. She began her vocal career as a talented Rich East High School singer in Park Forest, Illinois and later attended Interlochen Arts Academy. Upshaw received a B.A. in 1982 from Illinois Wesleyan University, where she studied voice with the late Dr. David Nott. She went on to study voice with Ellen Faull at the Manhattan School of Music in New York, earning her M.M. in 1984. She also attended courses given by Jan DeGaetani at the Aspen (Colorado) Music School. She was a winner of the Young Concert Artists International Auditions (1984) and the Walter M. Naumburg Competition (1985), and was a member of the Metropolitan Opera Young Artists Development Program. Since her start in 1984, Upshaw has made more than 300 appearances at the Metropolitan Opera.

Charles "Carl" Sprague Ruggles (March 11, 1876 – October 24, 1971) was an American composer of the American Five group. He wrote finely crafted pieces using "dissonant counterpoint", a term coined by Charles Seeger to describe Ruggles' music. His method of atonal counterpoint was based on a non-serial technique of avoiding repeating a pitch class until a generally fixed number such as eight pitch classes intervened. He wrote painstakingly slowly so his output is quite small.

Famous for his prickly personality, Ruggles was nonetheless friends with Henry Cowell, Edgard Varèse, Charles Ives, Ruth Crawford Seeger, and Charles Seeger. His students include James Tenney and Merton Brown. Conductor Michael Tilson Thomas has championed Ruggles' music, recording the complete works with the Buffalo Philharmonic and occasionally performing Sun-Treader with the San Francisco Symphony. Ruggles was also a prolific painter, selling hundreds of paintings during his lifetime.

Mike Seeger (August 15, 1933 – August 7, 2009) was an American folk musician and folklorist. He was a distinctive singer and an accomplished musician who played autoharp, banjo, fiddle, dulcimer, guitar, mouth harp, mandolin, dobro, jaw harp, and pan pipes. Seeger, a half-brother of Pete Seeger, produced more than 30 documentary recordings, and performed in more than 40 other recordings. He desired to make known the caretakers of culture that inspired and taught him.

Seeger was born in New York and grew up in Maryland and Washington D.C. His father, Charles Louis Seeger Jr., was a composer and pioneering ethnomusicologist, investigating both American folk and non-Western music. His mother, Ruth Crawford Seeger, was a composer. His eldest half-brother, Charles Seeger III, was a radio astronomer, and his next older half-brother, John Seeger, taught for years at the Dalton School in Manhattan. His next older half brother is Pete Seeger. His uncle, Alan Seeger, a poet, was killed during the First World War. His sister Peggy Seeger, also a well-known folk performer, was married for many years to British folk singer Ewan MacColl. His sister, singer Penny Seeger, married John Cohen, a member of Mike's musical group, New Lost City Ramblers. Seeger was a self-taught musician who began playing stringed instruments at the age of 18. He also sang Sacred Harp with Ewan and Calum MacColl.