Midi

im using a m-audio radium 49, it has a usb connction which is plugged into my computer and two midi outs 1 'usb out' 2 'keyboard out'.

when i connect the keyboard out into my mpc i can hear a weird humming sound?

I'm not sure why it is making that humming sound, but you will need a midi interface to sequence reason with your mpc.

its humming because of a grounding problem