When I think of Analog it makes me think of nature, acoustic instruments, and as a guitar fan the acoustic guitar. The origins of music often speak of rhythms and sounds that our ancestors heard in nature.
So, that's where this idea came from. As you can see, the roots of the tree form a guitar shape, what you might not be able to tell from the preview is that the blossom on the tree is made from musical notes. Details here http://society6.com/qbfox/ANALOG-zine-Details