Re: How to use sigmastudio software to realize an external potentiometer to control phase, the phase of the range is 0 ° to 180 °?

     Hi Bro,

     Thanks for the clarification, I assumed your noise was while turning the pot, since I could not hear any otherwise.  As it turns out, you need to update your SigmaStudio to at least 3.10 for the ADAU1701's Hilbert Transform to work properly:

     Find newer versions at SigmaStudio™ Graphical Development Tool | Analog Devices

     This should get rid of the high-pitched noise.  Also, please change the "Pts" (number of points) setting in each interpolator from 35 to 36 -- there's actually 36 entries in the table, numbered 0 to 35 (this error gets me every time, that's why mostly do analog!),