You do it in short windows, so you get eg. 512 samples and then run a short FFT. Or you can do longer windows that overlap, so e.g. hop by 512 but take 1024, mo

You do it in short windows, so you get eg. 512 samples and then run a short FFT. Or you can do longer windows that overlap, so e.g. hop by 512 but take 1024, more samples gives you more accurate results.