Any Steve Winwood fans?
Here is a blast from the past. (1971) Yeah, my freshman year in high school!
For context, "low spark" refers to "a strong undercurrent at street level". The Woodstock Festival was an example.
In this case, "Low spark of high-heeled boys" referred to rebels on the street corner who wore leather jackets and cowboy boots.
Yeah. Sure, it did. < wink, wink >
"And the thing that disturbs you is only the sound of The low spark of high-heeled boys."