Installing full Ardour 3 from binaries in Ubuntu Precise 12.04 LTS 64

I want to try learning some music composition in Linux. After some search, I found people do recommend several nice audio software for Linux.

One of these applications is Ardour. You can install 2009's version 2.8 from the official Ubuntu repos. The newest version is available for free as source code or in a limited demo binary from the Ardour webpage. You can also get an unlimited binary paying a small amount. But I wanted to test the newest version without limitations before contributing to the project.

Designing little robots

For the Tower of Babel project

Logitech c920 and c910 fields of view for RGBDtoolkit

I'm considering these webcams to use them with the RGBDtoolkit. I wanted to know their field of view, and if they would match the Kinect wide angle lens.
In the technical specifications of the c910 and the c920, Logitech provides only the diagonal FOV, but does not say if that data refers to a 16:9 or to a 4:3 aspect ratio. Most common sensors are 4:3, and judging by the capture frame sizes, so are these too.