Patent ID: 7642446

Claim:
A music system for producing music sound on the basis of pieces of regular music data stored in formats defined in MIDI protocols and expressing channel messages, comprising: a music data source including an information processor having a first information processing capability and a program memory where a series of instruction codes is stored, said series of instruction codes running on said first information processor so as to realize: a format changer changing the format of a channel message to a format defined in said MIDI protocols for at least one system message, a cipher manager enciphering said pieces of regular music data to pieces of enciphered music data, and a writer memorizing said pieces of enciphered music data in a data field of said format for said at least one system message; a music producer including a second information processor having an information processing capability and a program memory storing another series of instruction codes, said other series of instruction codes running on said second information processor so as to realize: a restorer restoring said pieces of enciphered music data in said system message to said pieces of regular music data, and a sound generator producing said music sound on the basis of said pieces of regular music data; and a data transporter for transporting said at least one system message from said music data source to said music producer.