I claim the ornamental design of a digital audio player, as shown and described.
FIG. 1 is a perspective view of the digital audio player;
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 design is the overall configuration shape ornamentation and pattern of the digital audio player which is made of metal, glass and synthetic resins. The design is for high-quality music file playback, portability and minimal size. The design is created for easy volume control through the volume wheel, which has a concave contact surface, is installed on the right side of the front within the groove-shaped recess and it is providing harmonious and understated sophistication by the oblique angle.