Considering the fact that Gödel, Escher, Bach persists as a member of my favorite books category, it comes as no surprise that any new information about Bach in general, or the Musical Offering in specific, piques my interest like a deer piques a cheetah who thought he had already eaten all the deer when this other deer shows up and the cheetah follows it into the brush but it turns out its a deer ambush and all the other deer surround him but then dance music starts playing and they all- wait... What? Nevermind.

I came across this video that had an interesting way of visualizing the Crab Canon, which has the remarkable property of being played once, and then repeated, but backwards and inverted. Ahhhhhhhh...... Bach.

An intesting way to visualize this is by writing the score out on a paper, cleaving it, inverting one half, and then joining the two halves at the ends but with a half-twist at one end. If that was a little hard to visualize, here's the video:

The enigmatic Canon 1 à 2 from J. S. Bachs Musical Offering (1747), The manuscript depicts a single musical sequence that is to be played front to back and back to front. Video by Jos Leys (http://www.josleys.com) and Xantox ( http://strangepaths.com/en/ )