Interesting how Gabriel Sizes’ notation looks like a proto-arranger view, complete with waveforms and automation. Makes me wonder if the oscilloscope was invented back in 1920?
obviously yes :
http://en.wikipedia.org/wiki/Oscilloscope
I have a record from the 70s on my wall featuring a “waveform”-view on the cover (it’s contemporary classic) which looks almost like the standard cooledit/audition waveform-view.
long before there were oscilloscopes, there were visual representations of sound waves 
FYI, the record I was refering to.
Electromagnetic oscillograph was invented long time before. I wonder why wikipedia doesn’t have a page on it. But modern ones look like this:
You can build yourself one with less than $5 of household items. 
i think they were so clear minded back then,
from so much silence from all the existential & general cachophony we experience in these days.
that they were able to understand things much quicker on fundamental level of brilliance, (such as air pressure) that they didn’t need much as far as instruments to measure things, cuz they just understood very easily.
for instance this:
http://www.wohba.com/pages/ruben1006.html
however this is only realworld interpretation.
i think back then, all they had was imagination to guide them. imagination which is always influenced by perception on this world.
Also, I just remembered. The electromagnetic oscillograph can be built without electricity or magnets. We had acoustic oscillograph at school. (A membrane moves the needle.) I believe the drawing is made with one of those.