Sonar - "Twofold Covering". Band on the Wall, Manchester 2nd May 2013

The excellent Sonar appearing at Band on The Wall: a venue in Manchester, UK on 2nd May 2013. The band appeared with no support act and performed two sets.
To be honest, I thought that it might become a bit tedious but I'm happy to report that, given the perceived limitations of the tritone tuning, this really wasn't the case at all. They fused the polyrhythmic flavours of PiL, King Crimson and Tool using a diabolical fusion of mathematical formulae and paradoxes. The myriad of musical textures and pulses that they produced suggests that they are still scratching the possibilities rather than exhausting them.
Equipment: iPhone 4, iMovie 9
UPDATE (12th May 2013):
I contacted Stephan Thelen (the guitarist on the right in the video) to request an explanation regarding the title of the song for non-mathematicians. This is his reply:
"
The piece is almost entirely based on the opening bass riff in 11/4. The (left) guitar and the ride cymbal then join in with exactly the same riff played twice as fast, so if the bass plays the riff once, the guitar and cymbals play it twice. Later in the piece it switches, the bass plays the fast riff and the guitars play the slow riff, but basically it's always the same riff in different speeds.
This reminded me of the mathematical concept of a twofold covering. In a simplified sense, that is a space where two different points can be mapped onto one point of another space - the 1st space is then called a twofold covering of the 2nd space because there are always exactly two points that "cover" a point on the 2nd space.
"

[@gordonperkins3678]

Most refreshing and inspiring band in a long long time....

[@lichencomputer]

Sonar just played their first New York set at Shapeshifter Lab in Brooklyn and they killed it. Great band.

[@Astral0muffiN]

I can't wait for this album. Also come play some for us swedes in a not so distant future will you!

[@kunst4life]

sehr cool jungs, bravo!