I didn't know about Jennifer Warnes so this is an incredible find. 'Path Down Deep' on a similar collection (The Hunter) is about as low as anything I know.
There's a YouTube video by Hans Beekhuyzen about Pi Power Supplies (https://www.youtube.com/watch?v=L_i8UTa4rw4) and he prescribes a Bob Dylan track, 'Man In The Long Black Coat' from the collection 'Goodness Mercy', that shows up PSU contrasts. I was suspicious however shockingly could hear the distinction between my standard Pi supply and an old yet great direct supply I have. I'll currently be building a littler, increasingly present-day direct supply for my framework.