You’ve got the right idea. You take a mix from the board and feed it to your camera. The board op should be able to set this up for you. If you have to operate the board and you’re unfamiliar with the process, hire someone. Either way, there are a number of pitfalls to avoid.
Most of the time you’ll receive a LINE LEVEL feed from the board, not MIC LEVEL. Be sure you camera’s audio inputs are set for LINE IN. Also make sure the line level from the board isn’t too hot (loud). Have the board op send you tone at “0.” Adjust your camera’s input so the meter reads “0”.” Now, make sure your volume controls are not turned below the half-way setting. If they are, ask the board op to lower the feed’s level. Then you can turn up your volume controls to “0” again. The purpose here is to make sure the feed audio doesn’t overload the camera’s first audio amplifier that comes before the volume controls.
Another thing that can happen is the board op may not ride gain during the show, so if the performance gets loud the audio could clip (distort) in the camera. So you may have to keep an eye on your levels and adjust them as needed. If the board can run a brickwall limiter on your feed, then the maximum level on the send can be set and you can rest easier.
Hopefully there’s a rehearsal or sound check where you can try all this. If it’s possible, ask the performers to do the loudest portion of the show. That way you’ll know for sure.
John
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