Blue Yeti Pro

Getting the Blue Yeti Pro operational in Gentoo requires the USB Audio/MIDI driver to be built-in to the kernel or, at minimum, snd-usb-audio built as a module.

Configuration
Simply use the application of choice to select the Blue Yeti microphone as the system's input device.

External resources

 * https://forums.gentoo.org/viewtopic-t-797843-start-0.html - A Gentoo Forums post concerning the correct operation of a webcam.
 * http://www.wolfmanzbytes.com/audio-gear/189-yeti-usb-microphone.html - A Yeti USB Microphone review.
 * http://www.linux-hardware-guide.com/2014-01-06-blue-microphones-yeti-usb-microphone