I2S on GPIO pins?

I just found that there is a GPIO map now on the wiki but my question is.
Where is the GPIOAO_7 (TDMB_FS) connected to?
GPIOAO_4 (TDMB_D0) and GPIOAO_8 (TDMB_SCLK) seem to be connected to pin 32 and 35
but no word clock on the pins?