Patent ID: 8477949

Claim:
In a system having an operating system and an audio output having a pair of speakers and a subwoofer, an audio system comprising: a central processing unit; an operating memory coupled to the central processing unit, the operating memory allocated into the operating system and a software audio module accessing by the central processing unit; an HD-audio interface coupled to the operating memory; a user interface display generated by the operating system on a display device including a user-selectable 2.1 endpoint and excluding user-selectable endpoints for two stereo speakers and a subwoofer that comprise the 2.1 endpoint; a software module in communication with the operating system, said software module comprising a digital full band equalizer; and a hardware codec operable to receive an audio stream comprising a left stereo channel and a right stereo channel from the software module through an audio interface; wherein the hardware codec further comprises: a crossover filter for dividing each of the left stereo channel and the right stereo channel into a high frequency audio signal and a low frequency audio signal; a mono mixer operable to combine the low frequency audio signal from the left stereo channel and the low frequency audio signal from right stereo channel into a monaural audio signal; a stereo digital to analog converter (DAC) operable to convert the high frequency audio signal from the left stereo channel and the high frequency audio signal from the right stereo channel into a high frequency analog stereo signal and to drive the pair of speakers with the high frequency analog stereo signal; and a subwoofer DAC operable to convert the monaural audio signal to an low frequency analog signal and to drive a subwoofer with the low frequency analog signal.