Ever listen to music through some kind of filter? You could set filters to only let certain frequencies through, or to remove certain frequencies. So, the idea here is to pretend you can do that, and listen but imagine you can only hear accented notes, say. Hopefully they’ll pop out a bit more. It’s a bit like in art class where they’ll say, for example, focus on the green colours in your field of vision, or in film where they do a colour wash, to remove a certain colour to stylise the film.
Then, as in the ‘focus on green’ idea, you might contrast a green with a strong opposite, like red, to enhance the green.
What thinketh ye, minions?