AnsweredAssumed Answered

Filter calculation ADAU1466 192kHz

Question asked by fbalk on Jan 23, 2018
Latest reply on Jan 25, 2018 by DaveThib

Hi,

we encountered a problem with the calcuation of filter coefficients with the ADAU1466.

With the ADAU1452 we convertet our values to fixedpoint with a constant 0x01000000 but this seems not to work with the 1466, instead we would have to use 0x00800000 like with the SIGMA200 series.

The same problem is also visible with the filter implementation in sigma studio itself. If you create a peak filter with a f0 of 1k, it comes up at 250Hz.

 

Additional to that, we saw that there is the wrong safe load address written in the export files (0x0000 instead of 0x6000 in this case).

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