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Strange speaker noise from new build pc

Last response: in Home Audio
December 27, 2012 9:38:01 AM

so my problem is that my speaker has no other sound but a strange noise when i plug it into my new build pc(front or rear jack), its a cm elite 311 casing, asrock h77m mobo and running windows 7 64bit.

i tried the speaker on my macbook and it worked just fine. i also reformatted my windows but the sound are still there.

i plugged in another old speaker to the pc and it also has the same problem(strange noise).

is it the motherboard audio jack or somewhat are causing this? the speaker was working fine on the new build pc before(using intel hd graphic) and after a long day i was messing with the graphic card (some problem) and finally get the graphic card to work then when i turn on my pc again it has this problem... it is really frustrating and double face palm... would buying a cheap external sound card fix this? pls help anyone?
December 28, 2012 4:27:25 PM

First of all "strange sound" may not be enough of a description.
Try posting a recording of it...
BUT there can be a problem, when data wires, etc are routed too close to audio wires inside the computer. Separate the wiring inside the computer and try rerouting it in different directions.
Separating the data and audio wires, drive wires,etc...can cure noises.
January 4, 2013 2:50:24 AM

problem fixed by buying a usb to sound adapter