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tlv320aic3204 接IN3L/IN3R 录制出来的pcm 没有声音,请问需要注意哪些寄存器配置吗?

接IN3R/IN3L  录制出来的pcm 没有声音,请问需要注意哪些寄存器配置呢? 

aic3204_write(IIC_device_addr[num], 0, 1 ); // Select page 1
aic3204_write(IIC_device_addr[num], 52, 0x04); //IN3L is routed to Left MICPGA with 10K resistance
aic3204_write(IIC_device_addr[num], 55, 0x04); //IN3R is not routed to Right MICPGA
aic3204_write(IIC_device_addr[num], 54, 0x03); // CM is routed to Left MICPGA via CM2L with 40K resistance
aic3204_write(IIC_device_addr[num], 57, 0xC0); // CM is routed to right MICPGA via CM2L with 40K resistance
aic3204_write(IIC_device_addr[num], 59, 0x80); // MIC_PGA_L unmute
aic3204_write(IIC_device_addr[num], 60, 0x80); // MIC_PGA_R unmute

aic3204_write(IIC_device_addr[num], 0, 0); // Select page 0
aic3204_write(IIC_device_addr[num], 81, 0xa0); // Powerup Left and Right ADC
aic3204_write(IIC_device_addr[num], 82, 0x4); // Unmute Left and Right ADC