I really love this Brad. What a virtuoso poem. You have captured the characteristic sounds of each element of a drum set in each successive line: cymbals for "trash day", the pedal-bass for "a drum set", and a roll on the snare "in the pouring rain". But the mood of the poem fills me with a melancholy sabi feeling. It is like the drum itself is trying to speak its sorrow at being discarded, striking up the beat, calling out the the musical heart of passers by. But now I am waiting for the song to start up, to fill in the backstory.
Oh, I think I've been a little obtuse here. I thought the drum set was represented by the different trash cans sitting out in the rain. Each can has a different sound according to how full it Is and with what it is filled — the rain making music on unmusical objects. A suggestion of finding music in the throwaways of life. I didn't think it was an actual drum set in the rain.