Do you have any plans to add software filter to filter out the signal i.e. below 60Hz ?
We don’t have any plans for that at the moment tbh. Would you like to add that to our feature requests board?
https://ideas.saleae.com/b/feature-requests/
Sorry for not being more helpful
Hi thanks! You are plenty helpful 
I am currently exporting the signal to matlab, running FFT with a window and a filter and rebuilding the signal back. This is fine
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Interesting!
We’re planning to build features like FFT as extensions (where you can process the data using Python and display it back on the screen)