Rikki,
I believe any type of music file, inluding midis can be converted to MP3'S. Just record the midis on your computer, save as an MP3, then save as SDAudio with Jukebox.
Of couse, I'm not sure why one would want to go through all that work. I'm not sure if the actual sound would be any better. Plus, SD Audio takes up tons of space on the SD Card.
Larry Hawk
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Larry "Hawk"
♫ 🎹🎹 ♫ SX-900