Music theory device

Description

FIG. 1 is a front, left and top perspective view of a music theory device, showing my new design;

FIG. 2 is a rear, right and bottom perspective view thereof;

FIG. 3 is a front view thereof,

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines shown in the drawings illustrate portions of the music theory device that form no part of the claimed design.

Claims

The ornamental design for a music theory device, as shown and described.