The ornamental design for an electronicmusicalinstrument, as shown and described.
FIG. 1 is a perspective view of an electronic musical instrument showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof; and,
FIG. 7 is a bottom view thereof.
The dot-dashed broken line showing in the views represent boundaries of the claim and form no part of the claimed design. The dashed broken lines showing in the views are for the purpose of illustrating environmental structure and form no part of the claimed design.