What is the topic of this article?
Experimental music
When did this become prominent ?
mid-20th century
On what continents was it generally found?
Europe and North America
Who was one of the first people to use the term?
John Cage
What "instrument" did Lejaren Hiller use in his works?
computer
Did Harry Partch and Ivor Darreg use traditional instruments?
No
How did they get these instruments?
they both developed them
Is the element of change important to some types of this music?
Yes
Could this music include nontraditional musical scales?
Yes
Do some types of this music include multiple styles at the same time?
Yes