It's a nuisance item that gets picked up either by cables or AC lines or other. There is no "do-this" cure, but you find it by moving components, cables around and I find the best result is to keep the gear away from the TV which is spewing a rather large EM field.
2. 2x, 4x.
1X is 1 to 1 playback speed. In short, 2hours. A 2X DVD-R for example can be written to the brim in 1/2 the time or one-hour. Not applicable to real-time recording which is 1X.
I am transferring old video cassettes onto DVD via my Panasonic E50 DVD Recorder. Playing the subsequent DVD I notice a constant hum whenever the recorded sound is at a low level ,which is not evident on the video cassette. Is this attributable to the type of disk I'm using ,ie lower price range?
Could someone also explain the relevance and difference between disks marked 2x, 4x etc?