LC7881 input format?

Hi all

I have a question about the LC7881
DAC I know - it's a very, very old chip but it intrigued me and I want to check what it's really worth - just for fun
I would like to connect it to the I2Sover USB but I can't identify the input format for the LC7881
The datasheet is not clear to me
Can you help me?

Attached is the datasheet
 

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