EMU10K1/EMU10K2 driver
One can select which capture source, but one cannot yet set volumes.
Signed-off-by: NJames Courtier-Dutton <James@superbug.co.uk>

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!