What are the steps for applying a 50% Overlap to an FFT? I'm currently working with audio where I apply an Hann window before running an FFT on a sample window of 4096 samples. I've been told that since I'm applying a Hann window I also need to overlap each FFT by 50%, however I can't seem to find a clear explanation of the steps involved in applying an overlap. Could anyone give me an idea of how to do so?
For a 50% overlap, offset successive 4096 sample windows by 2048.  e.g. the first half of the data in each FFT will be duplicated from the last half of the previous FFT window (before applying the Von Hann windowing function to either).