PCM56 and I2S

Hi there,
I pick up the I2S Signal from a CD930 I2S CD930.jpg

and want to feed 2 PCM 56P with it.

What kind of logic board do I need.
Actually I tested it with a logic board which should feed PCM1794 dac, but this does not work.
By the way with my 2x2 TDA1541 DAC it works fine.

Probably someone can help on this?

Many thanks in advance