This sound is from The Sound of Music (1965)

"The Sound of Music" is a beloved musical film released in 1965, directed by Robert Wise. Starring Julie Andrews as Maria, the story is based on Maria von Trapp's memoir, depicting her journey as a governess to the seven von Trapp children and her eventual love for their widowed father, played by Christopher Plummer. The film's uplifting songs, including "Do-Re-Mi" and "My Favorite Things," have become iconic. If you want to relive the enchanting tunes of this timeless classic, you can play and download them here.