A quote from an interview with Toby Driver

exciar28

neat bitch
May 23, 2003
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Seoul, South Korea
www.cyworld.com
"Progressive music is music that takes existing idioms and advances them. It also should act as a springboard for other artists who will take your advancement of music and advance it even further. It’s different from avant-garde music, which builds an idiom from scratch. Avant-garde music arguably doesn’t have artistic qualities so much as industrial ones. Avant-garde music invents ideas and presents them as only ideas. Progressive artists get inspired by these avant-garde ideas and use them in their storytelling."

I totally agree. but I think it is hard to classify real avant-garde music from something which we usally call avant-garde.