General MIDI arrangements of each piece in Alfred's Basic Piano Course: Christmas Ensembles Levels 2-3, provide a valuable opportunity for students to play along with professional-sounding accompaniments. The use of the disk will help students play correct rhythms from the very beginning, and will reinforce important musical concepts such as dynamics, phrasing and other elements of musicianship. The 3 1/2" floppy disk can be used in electronic keyboards or digital pianos that offer a disk drive and are General MIDI compatible.