There are currently a few bands with the name avantgarde, regardless of how it is actually spelt. One well-known band is an indie rock band from Spain http://en.wikipedia.org/wiki/Avantgarde_(band) and another is a booming rock band from Brunei. Another one is a german producer creating lo-fi electronic music with influences of ambient, rave, glitch and other styles. http://avantgarde13.bandcamp.com/ Brunei's Avantgarde consists of Syaeful (vocals