Drunk! Here is what you do. Go to Sam Ash or Guitar Center and get a pair of balanced 1/4" TRS cables. Should be no more than $7 each. You are going to go from the main ASR outs to the "Line (TRS)" inputs on the Mbox. Don't use DI. DI is for if you have a live guitar or some shit! On the Mbox, Input 1 is the left channel, and input 2 is the right channel.
Now, on the front of the Mbox, you want the little input buttons set to Mic (green LED under "MIC"). You can leave Phantom power turned off unless you hook up a condenser mic that requires it. You can leave the "Pad" switches turned off. This basically reduces the input by 20dB to help with clipping. If you are clipping, try turning down the ASR or input gain knobs on the Mbox first. Speaking of the gain knobs on the Mbox, I always left mine all the way down and increased the input volume directly from the MPC. Feel free to adjust these to your liking. Just make sure you aren't clipping coming in!
Now the mix knob is handy. It works pretty much just like a crossfader on a DJ mixer. When it's full left, it only the sound that is coming into the Mbox; in your case the ASR. When it's full right, it only plays sound that is in your Pro Tools session. And in the middle, you guess it, plays both input signal and what's coming out of the computer through the ASIO driver. ASIO is the driver for the Mbox to be used as a soundcard. This is not the driver for your regular computer sounds like iTunes, internet, mouse click, etc. This is only for programs that will use the ASIO driver to output through the Mbox; like Pro Tools, Reason, etc. So the mix knob will play any sounds the use the ASIO driver, which in your case will most likely only be Pro Tools.
One last thing! Tracking. With the ASR, you can actually record two tracks at a time. The track is to record in mono for certain sounds. For example, normal a kick and a snare don't each need to be output to a stereo track in your DAW. You can record them to mono tracks. So you'd just start by creating two new mono tracks in Pro Tools. Set the first track to input 1 and the second track to input 2. Name the first track "Kick", name the second track "Snare". Go into the ASR, pan the kick hard left and pan the snare hard right. This will send the kick out of input 1 (L) only and record to the first track, and send the snare out of input 2 (R) and record to the second track at the same time! Then just repeat for each sound. Some sounds you may want to record in stereo though, like the main sample, depending on how you sampled it or how the stereo image of the actual sound is.
That's the very basics. But there is a lot more you need to pick up! Good luck!
