By the way, did you know that they are also some of the people at the source of the Libre Art movement in France/Europe, even worldwide?
Yep, late 20th century, even before #CreativeCommons came around!
Their most famous band back then was the bizarre and satyric "Sebkha-Chott". You may have heard of them.
This band was quite famous while it lasted. Many of their members are still in current AMMD, in new bands!
Bottom line: you care about Libre Art in music? AMMD is a big part in its history!