The easiest way is to download a program called"MidiNotate".It is around $35. It is the best $35 I ever spent. You can play any midi(and others)and the score comes up while it plays.It gives you options like "fake lead sheet",which gives you the chords and lyrics(if present)along with the melody line for printing. Just go to Google and it will give you the URL
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pa4X 76 ,SX900, Audya 76,Yamaha S970 , vArranger, Hammond SK1, Ketron SD40, Centerpoint Space Station, Bose compact