Tagged spam because I'm really confused and not sure what I'm saying.
   And because I'm still learning about Vikings myself.
   I have made two gnuradio blocks!  I am a tiny hero!
   [1]https://gitlab.com/xloem/openemissions/-/tree/master/gr-blocks
Using gnuradio blocks lets one move towards working with open freedom communitie
s.
Gnuradio blocks are all documented at the gnuradio wiki.

Everyone's goal of course is a general-purpose workbench, but you have to start
somewhere.

Pad Crop Block:
    This is useful for organising wave periods together while adjusting theorise
d periods.
            note: there may be helpful blocks under Resamplers to shrink the wav
es for display if the sample rate is high
                  rescaling could also be added to pad/crop, or sdl video, but g
nuradio's way seems to be to use a hier block to move towards user design
    Connect these:
        Stream Tag Tools->Stream to Tagged Stream
                        configure this to guess the period of the waveform
        openemissions->Tagged Stream Pad/Crop
        Video->Video SDL Sink
                        configure the pad/crop block to output the periods align
ed with the video width
                        now any similarities between them are visually clear as
vertical bars

PiGPIO Sink Block:
    This is useful for driving hardware based on a time-synchronised signal.
    In Karl's noiscillate experiment, he has a noise generator connected via a r
elay to a raspberry pi pin.

    Connect these:
        Waveform Generators->Signal Source
                        configure to a square wave with a low frequency
        openemissions->PiGPIO Sink
                        oscillate power to a device using a relay
                        now the same flowgraph can be used mathematically to com
pare the signal environment with and without the device powered

References

   1. https://gitlab.com/xloem/openemissions/-/tree/master/gr-blocks