Computer sounds(feedback)

[Lonman]

Originally Posted by captnkarl

Bobcox, you're a genius...that worked great. Now the only thing left is a slight hiss, but it is way better than that feedback sound and might not even be heard in the bars. Thanks so much and I will keep looking on this forum and maybe help someone else someday.

Is it a problem to run this way all the time??

It is a real danger risk. There is a ground for a reason. It can be done to test - your feedback was a 60hz hum. But wouldn't use it for any long term. On the rare occurance that something happens where a spike turns up in the system, normally would go through the ground, without it, it will now find it's way to the electronics or worse the person touching the electronics. This is an old sound man's trick to eliminate hum from amps in clubs that would create it, but not recommended anymore.
The Ebtech unit linked to earlier (wrong link btw) is a safe way to eliminate the hum without hurting the grounding connection. http://www.ebtechaudio.com/humxdes.html Those 3 prong to 2 prong adapters aren't meant for eliminating the ground, the little tab that gets bent back (for those trying to lift it) is supposed to get screwed into the middle plate screw on true 2 prong only (no ground) plugs in older buildings.
The eliminator is not much at most music retail stores. But the equipment or life you save could be your own - yeah most are lucky and nothing happens, but there is always a chance once the protection is not there!!!