Patent ID: 7371959
Filing Date: 2008-05-13
Classification: G06F,G10H

Abstract:
1. An electronic musical apparatus comprising: a music playing data extracting device which extracts a MIDI music playing data file for controlling a tone generator for generating musical tone signals for a musical performance from a given music work resource, which is in a form of recorded representation of music, including encrypted or unencrypted MIDI or non-MIDI data; an encrypting device which encrypts the extracted MIDI music playing data file using an encryption key; a first storing device which stores the encrypted MIDI music playing data file encrypted by said encrypting device; a decrypting device which decrypts said encrypted MIDI music playing data file from said first storing device using a decryption key which corresponds to said encryption key; a second storing device which stores the decrypted MIDI music playing data file decrypted by said decrypting device; and an automatic music playing device which plays music of said given music work resource based on the decrypted MIDI music playing data file stored in said second storing device, wherein said first storing device is a memory card for storing said encrypted MIDI music playing data file, and wherein the electronic musical apparatus further includes a further encrypting device that again encrypts said decrypted MIDI music playing data file and a third storing device that stores the again encrypted MIDI music playing data file, and wherein said encrypted music playing data file stored in said memory card is deleted as said again encrypted music playing data file is stored in said third storing device.