hi, i have just noticed this starting today. there is a very slight continuous scratchy hum coming from my speakers. i connected a different pair of speakers and nothing changed, i even tried headphones with the same result. it is very annoying. i don't have any magnetic objects around or anything like that and it just started today out of the blue. also when i went to check the properties of my sound card which i thought was a soundblaster i wasn't even able to locate any hardware under the sound section.