9 I have worked in studios where a sudden surge from the microwave elsewhere in the house caused this crazy buzzing sound in the audio during a session. It always struck me as funny when guys worried so much about the microphone placement, but never addressed their obvious electrical hums and buzzes all over their studio wiring! Lighting If you are like many musicians who like to record in dim light, stay away from cheap three-dollar dimmers from Home Depot— as you’ll dim the lights there will be horrible noise interference in the audio. You’ll need to invest in what are called Incandescent Lighting Controls—extensively used for incandescent lighting in residential, theatrical, institutional, commercial andhttp://www.sounddevices.com http://www.sounddevices.com