during our practices, we are having trouble with the lead and back up mics picking up all the other instruments. This is causing us a problem with volume, my guitar tone being colored, and not being able to put effects on the vocals without all the the instruments being effscted as well. I was thinking that we could put some sort of noise gate on the mics, so that they would only pick up the vocals, but I am not to familiar with this. All that I have seen in our price range are compressor/gates, one in particular that is cheap is made by nady. will this solve our problem? How do I use it? Are there any other ways to solve this, keeping in mind that we have tried repostioning the mics with no success. Thank you for any advice.