Why are some of the Digital Music Notebook players features disabled when I load a particular song?
Though all of Digital Music Notebook’s tools and features should be available if you are using a standard “Sheet Music+MIDI” Digital Music Notebook song, for other content such as lesson books, some features may be disabled. For example, Pro-Authored MIDI songs (Yamaha Music School songs) may not be fully compatible with the transpose, karaoke and mixer features.
