For those who have not seen the video or the bass, the best way to describe it is to take the picture of the Alembic shown above, bind the front and back, make it a 2 p/u configuration, and change the wood to what I can only gather is either walnut or perhaps a dark mahogany. The neck appears to be ebony with oval mop inlays. Additionally there doesn't seem to be any contouring of the body either fore or aft, just a sort of slab look to it.
