nogginj wrote:Asking questions via Youtube is kind of nice...props.
I agree. It gives us a look at what you have and makes it easy to work with you.
Anyways, you have a Presonus Firebox and an MPC 2500. Connect 4 (or however many you have) individual outputs into the 4 inputs of the Firebox (2 on the front, 2 on the back). This is feeding your interface (and your computer eventually) audio from the MPC.
Then hook up the Firebox to the iMac via the firewire cable. I do not use Logic, so I can't tell you how to configure Logic to receive audio. If it's anything like Pro Tools, you have to insert an auxiliary track and set the input from the Firebox.
For MIDI, connect 1 output of the MPC to the input of the Firebox, and 1 input of the MPC to the output of the Firebox. This will let the 2 communicate. Again, I don't use Logic so I can't help you configure MIDI in Logic. Once you get MIDI set up in Logic, you will have to go into the MPC MIDI screen and set 'sync in' to 'slave' so that your tracks line up when you track them out. I prefer to slave the MPC to the software because there is a delay in my system when I slave software to hardware. I don't get any delay if the MPC is the slave.
Hopefully someone will come along and help you with Logic.
I hope this helps
Peace