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您好，我理解0X24 和0X4C都是digital volume，但是寄存器的page / book是不同的，还是建议参考PPC3 上的配置。
datasheet中有些没有列出的寄存器，在您附的datasheet 这个截图也有解释：
All register offset addresses not listed in Table 5 should be considered as reserved locations and the register contents should not be modified.
