"Pfft!" made me laugh. I just read Steinbeck's Travels With Charley, and "Pfft!" was the noise his dog, Charley, made when he wanted to get out of the car and pee.

Regarding the decline in popular music, maybe you could link to the original Scientific American article --

https://blogs.scientificamerican.com/observations/is-pop-music-evolving-or-is-it-just-getting-louder/

-- as I do hate going to the Smithsonian site.