Most of the real disappointments I've had at concert performances were not the performers' screw-up.

The great bugaboo appears to be sound techs who are great at doing sound for rock bands, but are trying to do sound for folk or bluegrass acts. Of course, the poor bastards are half deaf, most of them, so it's logical that they'd set everything so loud it's physically painful, and distorted besides, but it's still unpleasant.

Peter.