I'm having trouble recording SKY sports on my VCR, when I playback the crowd noise appears to be on it's own channel and is simply a loud drone which is actually louder than the commentary and makes games almost impossible to watch. Presume it is my VCR but I have cleaned the heads etc. and problem still exists. Wondering if this is a "mechanical" or a "electronics" issue and if anyone else has seen the problem. Only seems to have been an issue in the last 2 months. All components are Sony.