Using an Azden SGM-1x and for the past 2 years, it's worked fine, but latley, sometimes it works fine, and more often than not anymore, it sounds very thin, no low frequencys coming thru, and I have to turn the level on the camera up all the way for it to get a reading on the meter. Anyone have this problem with a shotgun mic, or any mic? And yes...I changed the battery!