Using qa_fft.py for inspiration[1], I'm trying to feed a raw capture file into an fft of size 32 and then review the 32 fft bins at an instantaneous point in time[2]. I must be doing something wrong however because when I review the vector sink's data() method, it returns a rather large array (compared to the 32-element array I am expecting). data() seems to return an array with the same number of elements as samples fed into the fft. I just want an array of the 32 fft bins so I can calculate the relative power in the given band.
Any help/pointers appreciated!
Thanks
[Brad Hein]