I have a soundcard with 1 MIDI I/O (1 Input & 1 Output) A digital Mixer with 1 Midi Input, 1 Midi Output, and 1 Midi Thru, And 1 Keyboard with 1 Midi In , 1 Midi Out. How do I hook this up all together?? Sorry this is such a newbie question...... I'll be over there in the corner, hanging my head in shame. Thanks in advance.