The "devoid of thought" bit reminds me of John Daido Loori's (I think no connection to Daido Moriyama) discussion of photography as a Zen student. And of course it's a well-known aspect of Zen Buddhism generally, though I've heard people suggest that it may be overstated in many Western views of Zen. I'm unsure of it myself; maybe I just don't have the knack of doing that no-mind state well, or maybe I actually disagree with it, but my experience is that I need to keep my mind checked in and focussed in order to feel that sense of the right time to release. I guess the "listen to *it*" frame makes more sense to me than the "devoid of thought" frame.
Not a trivial subject at all, IMHO.