I claim the ornamental design for an audio player, as shown and described.
FIG. 1 is a front perspective view of an audio player 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;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a partial enlarged view of the audio player of FIG. 6 that is included to more clearly depict the design as viewed from the front perspective view of FIG. 6.
The broken lines indicate unclaimed portions of the audio player and form no part of the claimed design.
The dot-dash broken lines encircling portions of the claimed design that are illustrated in an enlargement form no part of the claimed design.