this drawing shows a typical configuration for sound reinforcement,with the main pa fed from mix l/r and a secondary system fed from the matrix outputs.the illustration shows the flexibility of the inputs to the mixer and how the direct outputs are available as sources for a multitrack tape machine.the aux sends are used for reverb(aux 5 & 6 which are pre-fade)and for artists foldback(aux 1-4),with aux 3 & 4 switched globally to pre-fade.