I play in a trio at restaurants and casual gigs in the area. While I believe we are good enough musicians to be playing out and moving ahead, it seems like not enough attention is payed to playing within a group context. This is a big source of frustration for me. About five minutes into our first set I noticed an intermittent feedback. I was crawling out of my skin when I heard that and neither of the other players noticed it - I asked them. For the next half-hour I began trouble shooting during the set. I started by taking some of the bottom off of my sound and then gradually decreasing my volume throughout the set. The problem persisted. I narrowed it down to the guitar being too loud. I asked her to turn down and everything was fine after that. I feel that each player should be responsible for what's coming of his/her amp. Am I being unreasonable? What have been your experiences? How have you dealt with this in a diplomatic way.