Digital synthesis

Copperbox revision 3118.

I've started a doc summarizing what I'd like to achieve with the next tranche of work on Ochre (or Orca).

This is a bit presumptuous as I may not actually work on Ochre for quite a while, but I'm wondering if I think through my designs via writing them out it will lead to a better product than the attempts so far where I've just coded what was in my head. So far I've only written the introduction, which makes the title presumptuous (and pretentious...).