What is going on is that I am playing music off of my desktop computer which has a three prong on it along with my monitor. I guess that is the only thing that is ungrounded because my turntables, mixer, and stereo all only have two prongs on them. But since the computer is the source of my music and the external sound card I use is powerd via a usb port on my computer, could not grounding the computer really effect the sound quality?
Steady Hum is what I am getting. Maybee its just the quality of my stereo, it's nothing special thats for sure. Could speaker wire have something to do it with also?