Charlie:
When you talk about picking up ideas from billboards, TV spots, posters, etc., you are making reference to some advertising principles that quickly become quite deep;
especially in areas of big ticket sales and political persuasion. Why should composers be left out?
It is one thing to complain about the barrage of images, media and otherwise, such as robo-calls, as nearly all of us do, and another thing to take the analytical approach based on the idea that the public perception of reality is molded by what we see and hear every day. Trying to think of a bold example, such as, if we are at war with a country, you wouldn't want to write a song about what a beautiful place it is.

Link: www.soundcloud.com/ed_shaw (Feel Free to Use)
https://drooble.com/edward.shaw/hymn/index.htm
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