How to use AD1938 Audio Codec Evaluation Board for Mic/Audio input for digital conversion???

I am working on some optics-based project, for which I need to use 2 audio codecs at both TX and Rx and, just to make timing synchronization between TX and Rx. I am planning to use the AD1938 evaluation Board to convert audio/voice signals into digital form. I am only interested in discrete 1 and 0 outputs of ADCs so that I can further use this bit frame for the next block operation. I am unable to get the idea about, how to accomplish my aim with this evaluation board. I want to take this data serially out.

If anyone is having any idea about the AD1938 Evaluation board, then do help me. Any hint is also welcome.

Thanks & Regards