M69032P application circuit

The typical application circuit of M69032P is shown in Figure 9-33. The optimal input level of this device is 300rnV, and the maximum is
500mV. The left and right channel signals are input from pin 1522, the decoded main channel signal is output from pins 32 and 33, and the
center and surround signals are output from pin 3829. The subwoofer signal can be obtained by filtering the L+R signal output from pin 34. The filter
can be active or passive. This circuit uses a simple first-order passive RC filter, o is generally 100 ~ 150Hz. The
    external digital delay circuit uses Yamaha YSS-288, and similar product BA5096 can be directly replaced. You can also choose digital delay circuits
with good performance such as M50194, M50197, M65830 . The delay time is controlled by the external resistor R31 at pin 6 of YSS-288. Different from the general karaoke delay processing, this delay circuit does not have a feedback circuit between the input and output terminals (that is, it only has one delay). This is to ensure that the accuracy of the original surround sound field is not affected.