MPC Live II Help.

Hey just got my MPC live II for standalone use and loving it!
But i also own 6 external sytnhs everything is hooked to my lil 8 Channel mixer especially my studio monitors and all usbs coming from synths to a USB hub in the back of the MPC i can record the midi fine but how can convert the midi to audio? i'm kinda new to this stuff but idk i'm thinking the mixer needs to be hooked to the MPC not sure any help will be appreciated.

Midi is just data, it tells your sequencer which note to play for how long on which track. To record audio in to your mpc you'll need to connect your mixer to the inputs of your mpc. For further information I recommend to read the manual.