Ok, so I'm buying an audio interface that has MIDI input and output. Now I'm kind of a noob to MIDI, so I need to know a little bit about it. So first of all, if I buy a MIDI pickup like the Roland GK-2, can I run it straight into the audio interface and then run a MIDI program on the computer and get those synth sounds? Also, can I run a GK-2 through a MIDI-compatable keyboard (with MIDI in) and make those sounds with the guitar? And finally, if I have a slow computer and try to run MIDI through it, will it lag?