On another tack, I remember years back watching a singer guitarist performing a mildly comic song, with what I now know must have been a unidirectional microphone. Whilst you could hear him for the verses, each time he reached something like a Bm chord in the chorus, he stared stage left down at his fingers and no one could hear the words. To this day, he probably wonders why no one joined in the chorus with him, but rather sniggered where the lyric was actually devoid of comic content.