I know that the answer to this will probably be in computer recording, but it is a common enough issue that I thought that I would post the question here. If there is a constant buzz coming through a PA, is there a way of isolating that frequency, and then reducing or eliminating it with a paragraphic equalizer? I have not had time to really work with the shows involved. I am sure that I could find a non-musical passage, and look at it with the spectrum analyzer in SF8, but I don't know how wide a frequency range such a buzzing sound might have, and whether the reduction of that frequency would otherwise have a serious detrimental impact on the music. I was just wondering whether anyone had experimented with this or any other method to deal with this unfortunately not uncommon issue. TIA