Our customer found an issue on ADAU1451 SigmaDSP, the RMS table seem have problem.
When RMS Table choose index 1 (means -90dB), the output of RMS table is wrong and change repeated.
For example, please see attached .dspproj file, RMS table should output 5.96E-08 on format 8.24 (i.e. 0x00000001 on binary) when input = -90dB.
But as attached video show, it output wrong value (ex. 0xE4F4A25A on binary).
Note every other index (2~33) are all correct.
Sometimes after boot up , index 1 is correct. But wait a while, index 1 have problem again.
Could you confirm if it is a bug. If yes, how could our customer workaround it?
At first I could not get your project to load onto my ADAU1452 eval board (it gave Comm Failure errors, as if the USBi wasn't working),  The project loaded fine after re-drawing it from scratch.  In my case the RMS table works properly at any index, without the random numbers you were experiencing: