Every engineer or producer has gone through a session where the entire band is present, and each wants to hear “more me” in the mix. The result usually takes a well-balanced mix and turns it into a sonic goo that just doesn’t work any more. While we usually associate this kind of action with young bands with little studio experience, it can happen to well-established hit makers as well. Here’s a quick video that shows what metal producer Martin Birch went through with Deep Purple during the making of their breakout album Machine Head.