Calculation Of Noise correlation matrix in SIgmaDSPs.

I'm new to sigmaDSPs and working on EVAL-ADAU 1467Z audio signal DSP board,currently. In such a scenario, I have to construct a Noise Auto - correlation matrix present in the input mixture of audio signals through sigma studio 4.2 (for 64 bit OS). Can anyone help me out with this aspect? For instance, helping me with the right block of sigma studio to be used will prove to be beneficial.

Thanks in advance.