On stage, he hears a completely different mix, coming out of speakers called stage monitors.他从被称作舞台监听器的扬声器里听到一种完全不同的混音。I was playing in the studio off monitors because I can't play with headphones.我在录音棚演奏时没开监听器,因为我无法戴着耳机演奏。It was impossible to tell what key he was singing in - maybe the monitors went kerflooey.根本就听不出他唱的是什么,也许是监听器出了问题。