Listen to Beethoven: 12 Variations on "Ein Mädchen oder Weibchen" for Cello and Piano, Op. 66 - Variation XII. Allegro online. Beethoven: 12 Variations on "Ein Mädchen oder Weibchen" for Cello and Piano, Op. 66 - Variation XII. Allegro is an Unknown language song and is sung by Adrian Brendel and Alfred Brendel. Beethoven: 12 Variations on "Ein Mädchen oder Weibchen" for Cello and Piano, Op. 66 - Variation XII. Allegro, from the album Beethoven for the Home, was released in the year 2021. The duration of the song is 2:07. Download Unknown songs online from JioSaavn.