It consisted of singers with vocal ranges from high soprano to contralto, one of whom would also play piano accompaniment.

It may have been founded in Vienna by Edmund Fritz (also known as a movie actor and director);[2] possibly in the late 1920s; certainly by 1930, when it made its first recordings.

In 1934, it appeared in the film Annette in Paradise (AKA Ein Kuss nach Ladenschluss), credited as Singing Babies.

[citation needed] In February 1935, according to the magazine A Noite, the group performed at the Cassino da Urca in Rio de Janeiro, Argentina.

[citation needed] In 1937 and 1938, the group appeared in two short films made by British Pathé: The Coconut Grove – Cabaret Time After Midnight (soundtrack lost) (The Coconut Grove was a London nightclub),[9] and Viennese Singing Sisters.

[10] British Pathé have uploaded the song "Memories of Chopin" from Viennese Singing Sisters to their YouTube channel; the group then contained only six members.

[12] In November 1938, the group gave a 20-minute performance broadcast by two BBC regional radio stations, as The Viennese Singing Sisters.

A history of the group was published in 2015 by Karsten Lehl, Wolfgang Schneidereit, Andreas Wellen, Josef Westner: Die Singing Babies.

The group included, at various times:[citation needed](see the photo album link below for a playbill from the South American tour with each member's name listed next to their picture) {https://www.flickr.com/photos/63979448@N00/albums/72157627680100024/ Photos of the group scanned from Fritzi Lindberg's photo album inherited by a granddaughter who is editing this page; also contains a playbill from the South American tour, from Irina Maar's daughter's scrapbook which has names next to pictures.]