64barmusic started in 2009 when the friends on the Ninja Tune forum got together to create homemade mixes of their own music. Contributors were only given two rules. Make the song 64 bars long, and at an agreed tempo. After that, they were told to get creative. Anything goes. The idea is to see just how many grooves / angles / styles can be found at a set tempo. And it seems there are lots. 'BOUNDARIES: 20 Works From The 64 Bar Challenge' available now as a digital download at the Ninjashop.