General 2nd order EQ does not pass signal after project is closed and then reopened
I am trying to create a signal generator that does white noise, pink noise, and sine wave tone. I want to implement a band limiting filter on the pink and white noise. For this I added a General 2nd order 4 stage IIR filter with custom coefficients that I loaded. When I first create the schematic, everything works great as expected. I can download to the eval board and get the signals I expect. Once I close the project and reopen, the filter does not pass any signal at all. If I delete the filter block and set up a new one the same way, once again everything works as expected. I have verified I have signal before the filter, and the sine wave continues to pass to the output as well.
Audio Signal Processors
adau1452
Audio Products
software
Sigma Studio+ 2.0
SigmaDSP Audio Processors
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Hello kernel,
I can simulate the same as you did. It only exists with IIR (direct coefficient entry) filter and other filters categories of the same module are working as expected and sigma studio 4.7 didn't have this problem.
Let me get back to you in a while.
Regards,
Harish
Hello Kernel,
I reported this bug to the development team, and it will be resolved in the future release of sigmastudio+
Thank you for reporting this!
Regards,
Harish
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