FIG. 1 is an isometric view of the sound system for portable music player;

FIG. 2 is a front view of the sound system for portable music player;

FIG. 3 is a back view of the sound system for portable music player;

FIG. 4 is a left side view of the sound system for portable music player;

FIG. 5 is a right side view of the sound system for portable music player;

FIG. 6 is a top view of the sound system for portable music player; and,

FIG. 7 is a bottom view of the sound system for portable music player.

The broken line showing on the drawings is for illustrative purposes only and forms no part of the claimed design.