It reproduces the quality and richness of the original sound much more accurately and vividly bringing you closer to the sound of live audio to give you a better idea of how much better hd audio is cds are only 441khz 16 bit while hd audio is 96khz 24 bit meaning you get that much more digital detail you will hear the difference immediately with surround sound expansion your samsung audio expands the optimal listening area and elevates the height of the sound to the level of the tv s