Audio control accessory

FIG. 1 is a front perspective view of an ornamental design for an audio control accessory;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a first side view thereof;

FIG. 6 is a second side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the figures that are immediately adjacent to the shaded areas represent the boundary of the claimed design. The broken lines themselves and the unshaded surfaces they define form no part of the claimed design.