First, I realize this question isn't specifically related to a DB, but I know that many of you on the forum have years' of experience playing on stage, in bands, and working with sound systems. So I thought I'd ask here: I play two nights per week with a guitarist, and run my vocal mike through his PA. My DB goes through my own AI Coda. My mike stand transmits any time I touch it. Flick it with my finger and we hear it through his system. I'm using a Hiel vocal mike, but it does it with a Shure as well. I can "play" my cup holder that hangs on the stand like a washboard. Kind of reminds me of how "microphonic" the cable was when I tried the EAP pickup. Is it likely a ground issue somewhere in his system? Anyone have any suggestions?