Musical characteristics commonly found in works of the genre are traditional R&B melodies, complex vocal patterns, rhythmically unified extended composition, ambitious rock guitar, and instrumental techniques borrowed from jazz.
Prog-soul artists often write songs around album-oriented concepts and socially conscious topics based in the African-American experience, left-wing politics, and bohemianism, sometimes employing thematic devices from Afrofuturism and science fiction.
The original progressive soul movement peaked in the 1970s with the works of Stevie Wonder, Marvin Gaye, Curtis Mayfield, Sly and the Family Stone, Parliament-Funkadelic, and Earth, Wind & Fire, among others.
[2][nb 2] This trend was expedited by the exposure of young white listeners and musicians to African-American music played by ambitious disc jockeys on radio stations in the Northern United States.
[5] Progressive rock, another emerging subgenre, utilized an eclectic range of elements such as exotic instrumentation from classical and folk, along with highly developed lyrical concepts composed across album-length works.
[4] In the late 1960s, the structural and stylistic boundaries of African-American music were pushed further by the psychedelic experimentation of black rock acts like Jimi Hendrix, Arthur Lee's Love, and the Chamber Brothers.
[8] According to music critic Geoffrey Himes, this "progressive-soul movement flourished" from 1968 to 1973 and demonstrated "adventurous rock guitar, socially conscious lyrics and classic R&B melody",[9] while AllMusic says the genre was "flowering" in 1971.
[11] Under Berry Gordy's leadership at Motown, Gaye and Wonder were reluctantly given artistic control to approach their albums more seriously in what had generally been a single-focused soul genre, leading to a series of innovative records from the two during the 1970s.
[19] Mayfield's socially- and politically charged 1970 album Curtis featured both the extended prog-soul song "Move on Up" and orchestral-laden works like "Wild and Free", which employed harps to produce distinctive timbres.
[13] Clinton also explored the African-American experience and drew on "Black Power" literature as well as the music of Bob Dylan and the Beatles, pointing specifically to the latter's element of nonsense on songs like "I Am the Walrus" (1967).
However, Clinton's themes were more party-centric, influenced by contemporary street culture, and often incorporated lowbrow elements of absurdity and toilet humor similar to the experimental rock musician Frank Zappa's recordings with The Mothers of Invention.
[27] Wonder's mid 1970s albums are also highlighted by The Times writer Dominic Maxwell as "prog soul of the highest order, pushing the form yet always heartfelt, ambitious and listenable", with Songs in the Key of Life regarded as a peak for its endless musical ideas and lavish yet energetic style.
[28] Backus notes among the genre's many politically charged works to include the Temptations song "War" (1970), the LPs of Gil Scott-Heron, and the O'Jays' "Rich Get Richer" (from the 1975 album Survival).
[29] Sly Stone was "the first superstar" of progressive soul, according to Billboard journalist Robert Ford, who noted his ability to "pack people into [Madison Square Garden] whenever the mood struck him".
[30] In the wake of Sly and the Family Stone's politicized and pessimistic hit album There's a Riot Goin' On (1971), a wave of similarly fashioned soul songs began to dominate the radio.
The continued success of the O'Jays with their hit "For the Love of Money" (1974) was also discussed, with Gamble and Huff's production highlighted for the use of "voice phasing and a variety of electronic effects that rival some space rock efforts by white musicians".
[40] Parliament-Funkadelic also fell into disarray with mismanagement of its various musical projects, drug abuse among many of its members, and Clinton's professional disputes with their record label, culminating in the end of the collective's original run by 1981.
Often marketed under the term "neo soul", their members recorded collectively at New York's Electric Lady Studios and included D'Angelo, James Poyser, Q-Tip, J Dilla, Erykah Badu, and Raphael Saadiq (formerly of Tony!
[47] Himes, who cites Bilal, Jill Scott, and the Roots as a Philadelphia-based correlative within this collective, adds that they took "the progressive-soul tradition of Marvin Gaye, Curtis Mayfield and Prince and [gave] it a hip-hop twist".
[54] Monáe's work features Afrofuturist aesthetics and science fiction concepts, including narratives written around the android persona Cindi Mayweather, described by PopMatters critic Robert Loss as "a mechanical construction composed for the usefulness of others".
[55] Saadiq's 2011 prog-soul album Stone Rollin' prominently utilizes the Mellotron, an old-fashioned keyboard most often played in progressive and psychedelic rock, and evoking what AllMusic's Andy Kellman describes as "diseased flutes and wheezing strings".