Disklavier

I've ssen a few websites which play midi files (actually, they allow my 
computer to play their MIDI files) using Apple Quicktime which is 
already installed on my computer.  When I right-click on the website's 
audio bar thingie, I see a message that says something similar 
to, "PRO.  Save as source".  If I purchased the Pro version of 
Quicktime, would I then be able to capture these MIDI files as MIDI 
files which I could then play on my disklavier, or would Quicktime Pro 
convert them to something like a .wav file?

Thanks in advance...