How can I get rid of that loud ass annoying high-pitched pink noise like hiss I get on stage from the lights? When I move over a foot or turn a certain way, it goes away but then when I move it comes back. Does not matter whether my bass is turned down or not or what venue I'm in its there most of the time. Changed all my gear, got a new bass and still get that from time to time. Ground switch does not do anything. Will a voltage regulator help? If not, what will?