Was going to post about the audio as well when I saw your post. In my career I was in a round about way involved in what you mentioned. Fascinating work just based on the places I went, people I met, etc. Spent an entire day with Chicago, half a day with Pink Floyd including their pre-concert sound check, and so forth.
Was involved because of it with the building of the Georgia Dome. Had a vendor/construction pass, so I could go down at any time during the construction of it and walk/look around. My son at the time was about 10 or 12, and for 'Take your Son to Work Day' I took him down there (as I recall it was when it was built but not finished and they had a line of concrete trucks miles long and were pouring the 'field' that they would then put astro turf over). One of the guys we were talking to gave my son about a 3 foot section of the audio cable that they used to connect the speakers/sound system that they had ringed around/above the field. It was about 3-4 inches thick. Heavy and you couldn't hardly bend it.
He still has it. Last I heard he has it in his car in case he needs something like a club or a baseball bat.
