When I am trying to adjust the volume settings for flash player on a website I use it gives a horrible loud screeching feedback sound. I noticed that it does not do this when I have the volume turned off on my macbook and i'm adjusting the volume. I use a webcam on this site the Logitech Brio, but I have trouble with the volume on it for some reason people say that it does not pick up the volume and sounds flat so I've had better feedback using my built in mic. I'm just very confused on this loud screeching sound and why it does this. I don't want to blow out my speakers when adjusting the volume. Or would you recommend just temporarily turning off my volume when adjusting the flash player volume and then turn it back on when I am done adjusting.