Ask about the DE2 Audio Codec.

YA thanks.. but theres a bigger problem. My program is supposed to take in the ADC output into it and then work upon it to give out another set of bits, both input and output being serial. The output then goes into the DAC which gives us the analog signal.. Now, the Audio Codec has an ADC data output, a DAC data input, an ADC sample clock output, a DAC samlpe clock input as well as the master clock. Now we want to synchronize all this with the program but have no idea which clock to use! Please guide!