M1 and M2 are the two different microphones, M1 is the one nearest to the mixer. DL and DR are for the CDJs when they’re in the studio. The gain for the microphones should be set to about 35. This is how the rest of the dials should look. Use these “on” buttons to turn the mics on and off, if the light is on, the mic is on. Keep the faders at the top. This channel is used for the music coming from SAM. Move the fader down to just under half if you want to talk over the music that is playing. The main volume slider should be all the way up. Use these two dials to change the volume in the headphones. This shows the volume of the output of the mixer. This is a good level for it to be at. This is too low. This is too high.