Hi, This may sound like a really basic question but I had difficulty the other day trying to explain to a friend: What is the difference between the gain and fader on a mixer? I started to mention that the gain is a ratio and then got lost! He wanted to know the reasoning for having 'two volume controls' as he put it! I just couldn't explain it to him!!!! It's odd how we use these all the time yet cannot explain to someone why there are two amplitude controls!