Bruce Hornsby & The Range - "Mandolin Rain"

"Listen to the banjo wind" and "Listen to the Mandolin Rain" are lyrics within the song "Mandolin Rain."  I have listened to the song quite a few times and still have no idea what that means.  I actually forgot about the 1987 hit until Josh Kelley covered the song in 2014.  I also had forgotten about Josh Kelley.