I just added a C-Media C8738-MC6 audio card. For a long time the sound volume was very, very low and I had to run my speaker volume way up to hear it. Then I started playing with audio settings. I opened up K-Mix...for each slider there are green lights at the top and red lights at the bottom. I have no idea what they mean but when I clicked on the red light at the bottom of the PCM slider, suddenly the volume turned up to a normal, clear level. However, if I use the slider on RealPlayer, the volume goes back down...until I click the red light again. It doesn't seem to matter if I click it on or off, it just makes the sound normal. Questions: 1) What are these green and red lights? 2) Is there some way or some other setting I can change to make the normal sound volume 'stick' ?