Hi Rune,
I am sorry to hear that the convolve math caused so much delay and that I didn't notice it. Not sure how to measure this. Running python 3.7.4 under OSX does not seam to have a lot of delay. Could there be a difference in python versions? Another member also mentioned in a PM to me that he experienced higher CPU load.
Fortunately Oristo was able to help us out!
I will try to write down the theoretical background of these routines as to explain the physical background.
Regards,
Eric
