The Portsmouth Sinfonia - (the sound of metal-scraping against metal...) Answered
Once again I'm browsing coudal.com and I find something interesting.
The Portsmouth Sinfonia was a real orchestra founded by a group of students at Portsmouth School of Art in Portsmouth, England, in 1970 — however, the Sinfonia had an unusual entrance requirement. Players had to be either non-musicians, or if a musician, play an instrument that was entirely new to them. Among the founding members was one of their teachers, English composer Gavin Bryars. The orchestra started as a one-off, tongue-in-cheek performance art ensemble but became a cultural phenomenon over the following ten years, with concerts, record albums, a film and a hit single. The impact of the Portsmouth Sinfonia was considerable and their name and reputation has endured even though they last performed publicly in 1979.
But listen to 'em...
And the rest.
E.g. Dance of the Sugarplum Fairy
And Satisfaction (Stones)