On 4/30/24 18:35, Gary Schafer wrote:
"I need data points at convenient intervals for time series plotting,
e.g., 512 samples/second going into a 512 bin FFT to provide one maximum
amplitude value per second."
Let me answer that one at the same time as "Ultimately I want to plot
both the
Let me answer some of your questions in reverse order:
"My main question is why the displayed maximum bin value is updating much more
slowly than once per second when FFT size = sample rate."
That could be due to an issue in Gnu Radio. I've noticed that if the bin width
(sample rate / N) is
"I do understand the relationships between sample rate, FFT depth, time resolution,
and frequency resolution. I used 512 samples/512 bins/1 second as a simple test case for
the problem that I'm not getting one data point per frame, regardless of the frame
rate."
Sorry about my
On 4/30/24 21:40, Gary Schafer wrote:
Sorry about my misunderstanding. I recreated a portion of your flowgraph
just to see what it would do. I left the 16 kHz sample rate but with a
2^15 time record size. Once I ran the flowgraph, it was 17.5 seconds
before the Number Sink updated, and 34
