So this got the wheels turning...if I could improve the quality of the audio, I could produce some great live videos. So I went digging in the closet and dusted off the field mixer. With this I can take a feed from a sound board or use an on-camera shotgun mic, but bypass the built-in camera preamps. The Sound Devices preamps are pretty highly regarded in the film industry. After gathering the necessary cables and adapters I have the rig working. Here's a few images of the setup.
Canon 5D Mark III, Canon EF 28-70mm f/2.8L, Rode NTG-2 Shotgun Mic (phantom powered), Sound Devices SD-302 Field Mixer and an Edirol R09 Stereo Recorder
(2004 Fender American Deluxe Telecaster, lol)
Love the SD-302 meters and limiters!
So the way this works, the mic runs through the SD-302 preamp (bypassing the camera) and then outputs its clean signal to the camera. As a backup, I output the main mix from the SD-302 to a stereo recorder in uncompressed broadcast wav format. In addition, I can monitor the audio being sent from the SD-302 to the camera by plugging into the camera's headphone jack.
I recorded this video of a band called Blind Innocence from Orange County, California. The audio was not recorded with the new rig, but with a shotgun mic connected directly to the camera so the camera's preamps were still used. The song was written by Angelyn Iturbide (on vocals) and the band consists of Angelyn Iturbide on vocals and guitar, Brandon Shelton on guitar (hidden) and Kevin Celinder on guitar.
Disclaimer: embedding the video got cropped, so click the link below the video to see it full screen. Also, the venue is really small and was packed so I didn't have too many choices for camera angles.