Erdem HELVACIOGLU + Per BOYSEN Présences… by inagrm
This gig was performed in octophonics. At the soundcheck we were told they
actually had set up two circles of eight speakers system. One big
circle with the big speakers surrounding the audience and one inner circle… or
should I rather call it “inner exploding core”? We decided to use
both. I had re-routed my laptop outputs for octaphonic treatments and
Erdem used his rack devices through a borrowed stage mixer to address
the surround system. On stage we had a stereo mix of all eight
surround channels, so the monitoring sound were rather flat.

If you click the source link there are more videos of many other artists. Among them many of my own favorites, like for example Biosphère and Supersilent.