Quote Steve A:
I've encountered this before as well, it's quite common. You're almost certainly experiencing a ground loop.
I'm not convinced it is, I've tried it on seperate power supplies, all sorts of theatres, different DI boxes with lifts, everything, and it never fixes it.
The No1 reason why I ALWAYS advise to clients to use a Mac if possible for ANY live performance work. I've yet to come across this issue with a Mac but lost count of the amount of times I've had to deal with it under live conditions. It's really something PC laptop manufacturers should address immediately.
Agreed. My personal computer is a macintosh but I'm loathe to bring it into work, and school won't shell out for a new mac laptop because of the high cost to low use ratio, plus the ICT won't allow them on the network. It's massively frustrating!