I'm new to audio and was looking for tips for field mixing.
Our crew was shooting interviews in a high traffic public area. I had the boom on one channel and a lav on the subject on another channel. I had the Lavaliere hitting around -12 to - 6 db and it sounded find - good separation between subject dialogue and background noise. With the shotgun mic, even though it was close to subject as possible without entering frame, it was picking up too much of the background noise if I adjusted gain so it was hitting at -12 and - 6 db. So, unless I brought down the shotgun levels, when I listened to it stereo mixed, the background noise was too overpowering.
Since, these tracks are separate, would I still want the shotgun mic hitting about the same levels as the lavaliere mic and let the editor choose which track they want in post or should I try to bring down the levels of the shotgun mic so that the background noise is minimized. I don't want the producer to look at the footage and think that sound is bad, but at the same time I don't want to leave the editor without an option. What's the general rule of thumb to do in this situation?
Thanks in advance.