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Thank you! That info pointed me in the right direction :-)

Might still not understand it completely but if the time between samples is 2/256 and widthfilterparam =5 is it then not 10/256 (0,0391) ?

Minor questions

  • did you profile the main routine? In other words is it fast enough to be executed within the 1/128 second? If you did not profile it, no problem I will try to do it.
  • why the lowpass filter? Did you see weird values sometimes? With other words is there really a need for the filter?