Multimedia Hi-Fi amplifier circuit

This circuit is an active amplifier for listening to HI-FI music on a PC, as shown in the figure. The sound processing chip ICl uses the QS7779 virtual surround circuit of Canada's QSOUND company. Since the circuit has built-in Dolby directional logic and Dolby digital mixed signal***, it can enhance the effect of ordinary stereo signals; secondly, when playing the Dolby digital signal of a DVD, it can also decode it first, then perform matrix operations, and output it from two channels after virtualization; thirdly, different effects can be switched through switches.