Hahah, they'll ban me from the list because I sent three mails instead of one. Only use one source for the mains. Different sources could come with different potential and ground could become extremely dangerous. While your single coil guitar's strings are connected to ground and the guitar amp has another source for the mains than the mixer that the microphone is connected to, then if you'll "kiss" the microphone while singing and playing guitar, the potential differences aren't funny anymore. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user