PCM1862: How can I set register for the digital mixer.

Hi team.

I tried setting up according to bellow the document.

http://www.ti.com/lit/an/slaa662/slaa662.pdf 

However, I'm stuck in section 4 on page.3.

Because I can not find the register map for digital mixer setting on the data sheet.

Could you advise how to set this register?

Sincerely.

Kengo.