Patent ID: 7935878

Claim:
An electronic musical apparatus comprising: a receiving device that receives a music work resource; a music playing data extracting device that extracts a music playing data file from the received music work resource; an encrypting device that encrypts the extracted music playing data file with an encryption key; a first storing device that stores the encrypted music playing data file; a decrypting device that decrypts the encrypted music playing data file from the first storing device with a decryption key that corresponds to the encryption key to permit the decrypted music playing data file to be played; a second storing device that temporarily stores the decrypted music playing data file decrypted by the decrypting device; an automatic music playing device that automatically plays music by controlling a tone generator for generating musical tone signals for a musical performance based on the temporarily stored decrypted music playing data file from the second storing device; and a deleting device that deletes the decrypted music playing data file stored in the second storing device after the automatic music playing device plays the decrypted music playing data file stored in the second storing device, wherein the received music resource is in a data format that is unplayable by the automatic music playing device regardless of whether the received music resource is in a decrypted or encrypted form.