Yamaha Midifiles Schritt for Schritt "Addendum", tutorials for midifiles, change and optimization of midifiles, change midifiles directly on the instrument, description of formats XG,GM,SMF,GS etc, special for Tyros 1,2,3, midifile revoicing, lyrics and text file, pitch correction, change files on the computer, change sounds, print text from a midifile uvm. ATTENTION: available only in german language!