ADAU1467 SigmaStudio4.2 Behavior of slew filter is different from expectation

Hi,

As in the attached project, we placed two different types of filters.

One has no slew, the other has slew.

There is a problem in the behavior of the filter with slew.

Setting this slew value to greater than 0, unexpectedly affects the output gain.

I think that the slew value doesn't affect the output gain.

When compared with the filter without slew, the output changes slightly.

Does this phenomenon include any problems?

Or is it a specification?

Design6_Q42.zip

The outline of the design is as follows.

The phase and amplitude of the output of each channel differs from the expected value.

Comparing the two waveforms is as follows.

I expect that the same amplitude and phase will be output.

But amplitude and phase are different from expected values.

Thanks and Regards,

Edit Notes
Added comments and measurement results.

[edited by: takumi3952 at 1:08 AM (GMT 0) on 1 Mar 2019]

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