decrink wrote in post #8894823
I assume these have cheesy little mics built in?
Yes.
Do most people use outboard gear to record, Edirols or something like that?
Not sure about "most people". If you have the camera on the tripod or are not using the cameras controls much, you can probably get away with the internal microphone. But if you use the focus ring or zoom ring on your lens, the camera picks up that noise.
So for any "serious" shooting it seems like an external microphone is necessary.
What is the interface for external mics?
Standard 3.5mm jack
Does the sound record as wav right to the card? Embedded in the video? I searched audio and 7d and couldn't really find the specs.
It's embedded in the video file.