ADAU1966A I2S Multiplexing

dears:

        I have a special need now .

        I need to make a multi-channel audio product .

        I want to know how many analog audio channels can I output if I input one channel  I2S to adau1966a. (for example ,DSDATA1 input)

        Because I want to get multichannel audio, but I don't know what to do now,

        (1)  The first way is to turn all the I2S into multi-channel, but I don't know how to do it. 

        (2)  The second  Looking for a DAC with single I2S and multiple analog audio 

        I want to be able to control the on-off operation of each path independently.

        Could the experts of ADI please give me a good proposal?   I would appreciate it if you could help me.

thanks!