Listen to Waltz in A-Flat Major, Op. 42 online. Waltz in A-Flat Major, Op. 42 is an Instrumental language song and is sung by Abbey Simon. Waltz in A-Flat Major, Op. 42, from the album 111 Piano Masterpieces, was released in the year 2010. The duration of the song is 3:50. Download Instrumental songs online from JioSaavn.