Multi-channel surround sound audio signal processing circuit

Shown is a multi-channel audio signal processing circuit . The
    multi-channel audio signal processing circuit is a stereo circuit in AV power amplification equipment. This circuit has multiple external audio signal input interfaces
and can simultaneously input audio signals from CD, VCD, DVD, and camcorders (two-channel). The R and L signals are selected through the audio source selection circuit.
The signal is sent to the Dolby directional logic decoding circuit M69032,P for surround sound decoding processing. After decoding, there are four (multi-channel) outputs. L and
R are stereo channel signals, S is the surround channel signal, and C is Center channel output. The signals of the S and C channels are amplified to drive their respective speakers
, and the S channel is divided into two signals to drive the two speakers. This circuit has a total of 5 channels
, which can create a surround sound effect with a strong sense of presence .