Accessory device, electronic musical instrument and teaching apparatus

Abstract

In an electronic musical instrument, an interface part obtains user information from a dedicated accessory device logically connected to the electronic musical instrument. An access part accesses a server using the user information obtained through the interface part. A character information acquisition part obtains character information which represents a character and which corresponds to the user information, from the server or the dedicated accessory device. A lesson information acquisition part obtains, from the server, lesson information which represents a lesson work to be practiced. A control part performs control operation to display the character created based on the character information obtained by the character information acquisition part while the electronic musical instrument is logically connected to the dedicated accessory device through the interface part, and to display the lesson information when the lesson information has been obtained by the lesson information acquisition part.

1 . An accessory device comprising:
 a nonvolatile storage part that stores character information representing a feature of a character;   an interface part that reads and writes the character information from and to an external device which is logically connected to the accessory device;   a display; and   a control part that performs control operation to display the character created based on the character information stored in the nonvolatile storage part, on the display, and to hide the character from the display while the accessory device is logically connected to the external device through the interface part.   
   
   
       2 . The accessory device according to  claim 1 , further comprising:
 an operator which is operable by a user; and   a change part that changes the character information stored in the nonvolatile storage part according to an operation of the operator or an elapsed time.   
   
   
       3 . The accessory device according to  claim 1 , wherein the interface part comprises a contactless interface of a proximity type or a neighborhood type, which is capable of logically connecting the external device when the accessory device is placed in proximity or nationhood of the external device. 
   
   
       4 . The accessory device according to  claim 1 , wherein the interface part comprises a contact-type interface having exposed electrodes for electric contact with the external device or having a connector for connection with the external device. 
   
   
       5 - 15 . (canceled)