I have just started using a dm2000 at a church. The board was already set up. I mostly adjust faders, mute channels, adjust eqs and compressors during service. I have had to adjust gain a couple of times when a guest speaker has a much louder voice than our normal one. With channel 1-24 that is no problem. There is a physical gain nob and pad button. But my question is "how do I adjust the gain for channels 25 - 96?"