Abstract
In this study, the development of software which can be degree of difficulty judgment and can be complication and simplification the SMF of the music data. First, we analyze each event by reading the existing SMF, and determining the degree of difficulty of the music based on the information of the amount of the note, the range to be used, and the rhythm. Then, to add the arrangement function that makes it difficult to insert the music pattern to any location, and also makes it easy more by deleting or simplifies any phrase in the music data.
