in the world of accordions, there's a secret, almost like a whispering game, called "sub rosa," where accordion players start from the top of the song and play with a secret joy. they sometimes underplay the notes on purpose, making the melody even more magical than the previous times they've played it. it's like putting in a special input into their music that only those who really listen can hear, creating a beautiful, secret song that dances quietly in the air.