Based on the title provided, you are referring to the 2001 hit song (How Quietly the Leaves Were Falling) by the Bulgarian chalga band Южен Вятър (Yuzhen Vyatar).
The year was 2001, and the air held that specific chill of a season coming to an end. Just like the lyrics suggest, there is a particular silence when the leaves begin to fall—a soundless descent that mirrors the way old memories eventually settle into the earth. 09_yuzen_vyatr_kak_tixicko_si_kapexa_listata_2001
09 Южен Вятър Как тихичко си капеха листата 2001) Based on the title provided, you are referring