Sorry Denis, but this has nothing to do with shift registers : a graph olds its data as long as you don't write anything else in it !
😉The flickering is due to the way the averaging is done, 2 subvi layers down. I don't have enough time to dig something out of there, but what can be done in the main vi is to add a case structure around the graph terminal, and wire the case input to a comparison node between the "magnitude" in the "power spectrum" cluster and an empty array.
See the attached vi, which is the simplified version I was asking for in my first answer.
CC
Chilly Charly (aka CC)
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