Here, Betsy, John Finnemore's take on PoetryPlease, maybe these are the voices you hear too!
John Finnemore's Poetry Please

Sometimes PP has me riveted, sometimes I find it dreadful. I still find it worth a punt.

A couple of years ago they had a recording of Laurie Lee reading his Winter Poem (Tonight the wind gnaws with teeth of glass...). It was superb and I couldn't imagine it coming over in nearly the same way if it was a song. Or, indeed with an actor reading it.
Though it doesn't rhyme an enormous amount of craft has gone in to a poem like that.