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EVAL-ADAU1701MINIZ: SigmaStudio's EQs control wrong frequencies

Question asked by Prius on Aug 11, 2014
Latest reply on Aug 12, 2014 by Prius

Hello, I am trying to configure above evaluation board as per screenshot below.

For the EQ, I use “Filters, Second order, Double precision, 2 Ch, Medium Size Eq”. The only thing I have changed is the frequency of each, the remaining parameters being as they come in the program (i.e. Peaking EQ, Q=1.41).

But: After “Link Compile Download”, the frequency bands controlled are not those I have entered, instead they are at approx. 1/4th of the frequencies I have chosen. 

E.g. trying to control 1kHz, the real frequency it controls is around 250Hz. The same thing happens with all the other frequencies, e.g. the 16kHz EQ controls around 4kHz.

Am I doing something wrong here?


Thank you for your help.

SigmaStudioEQs.jpg

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