This was a riotous sound collage of pop, prog rock and jazz, with strange rhythms, flourishes of strings, urgent riffs and angular vocals.

As the album title suggests, this sprawling sound collage can be the stuff of nightmares.

Techniques such as tape looping and tape splicing were used in his research, often comparing to sound collage.

He worked with both print and sound collage, film, performance, and presentation.

Sound collage became more common with the widespread use of magnetic tape in the early 1950s.