I sometimes see sound guys doing a live mix at the side of the stage. How can this possibly sound good? I would think that what the audience hears is a combination of live sound from instruments and guitar amps and PA speakers. How can someone possibly mix for good sound at the side when their perception of sound could be drastically different? I once attended a small concert where the sound guy was very close to the front of the stage and he had headphones on the whole time. It was loud and shrill and the worst thing I ever heard, especially knowing how good the place can sound. Isn't it obviously wrong to mix a show from anywhere other than the audience?