Listen to Waltz in A-Flat Major, Lullaby online. Waltz in A-Flat Major, Lullaby is an Unknown language song and is sung by Study Music & Sounds. Waltz in A-Flat Major, Lullaby, from the album Study Music for Brain Power, was released in the year 2018. The duration of the song is 1:18. Download Unknown songs online from JioSaavn.