| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electronic musical instrument which has high transportability, is compact and makes playing easy and to provide a practice tool which can be used for practice anywhere. <P>SOLUTION: The electronic musical instrument 10 comprises an electronic musical instrument main body 100 and a sound source device 130, and the main body 100 has a strut 110 and a grasping section 111 and roller section 112 at the strut 110 so as to make the strut 110 freely rotatable; keyboard sections 120 having a multiplicity of keyboards varying in scales are symmetrically arranged at the strut 110; and the keyboard sections 120 are spirally arranged in such a manner that the same tones apart octaves are arrayed in the axial direction of the outer periphery of the strut 110. Also, the practice tool 500 for the keyboards of the electronic musical instrument comprises displaying the keyboard sections 120 having a multiplicity of the keyboards varying in the scale on a sheet-like member 510 and spirally arranging the keyboard sections 120 having a multiplicity of the keyboards varying in the scale along the winding direction of the sheet-like member 510. <P>COPYRIGHT: (C)2003,JPO |
