I have a Sony DVD/ Surround system and for some reason there is a high pitch noise coming from the speakers?

Question

Anybody know what is causing the noise?

Answer 1

Most of the interference and ground loop problems are low frequency sounds. Sometimes you might not hear the main problem itself but harmonics of the same which present in slightly higher frequencies. If it's like faint buzzing, it can also be a faulty component inside your system.

I suggest that you first seperate your wires properly from each other and from any components and use proper grounding.

Then check the mains supply and if possible use a surge suppressor meant for high quality audio.

If nothing helps, get your equipment checked for high voltage breakups in the transformer and problems with capacitors or line filters.