Most of which you wrote was well placed and alot of what my mom said. She was worked and studies plants for years at a greenhouse. I dunno how it works its absolutely possible it is the vibration and frequencies of the stringed instruments when played at set tuning hz of 423 and 432 that causes the changes in plants grow behavior. Studies with rice showed heavy metal like emo and scream cause rice to die while classic music specifically the violin cause rice to maintain itself for a very long time. When I studied the theory with Marijuana classical music from Bach and Mozart it made a difference. My brother did it but different grew one in his room and one in a closet other end and yelled at it and played his normal music rock and roll. Plant produce quarter oz when the other produced 2.5 ozs. Was proof enough for us to do it. I changed how I enjoy plants after a very strong trip and felt the Earth resonance. I do want to try and find updated studies since this was quite a while ago over 6 yrs has passed. I can tell u Marijuana plants happier outside next to trees then indoor. Sure indoor can produce more but happier nope