The ornamental design for an electricviolin, as shown and described.
FIG. 1 is a front, top and right side perspective view of an electric violin showing my 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 plan view thereof; and,
FIG. 7 is a bottom view thereof.
The broken line that appears on the upper, right side of the electric violin body in FIGS. 1, 3, and 5 represents an unclaimed cut line and forms no part of the claimed design.