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Hello everybody! Since I was sharing this image with others, I thought I'd share it here at Digilent as well. The attached image shows the frequency response of several FFT windows, including the well-known rectangle and Hanning windows. The blue window is one I've put together, but haven't shared the FPGA source code used to implement it. I challenge anyone to do better. Oh, and one other comment ... all but the Hanning window can be used in an invertible FFT process. Dan