This, on the BBC World Service, was good
Music that survived the Nazis

There is a common misconception that music under the Nazis was either ‘Degenerate Music’ to be suppressed or propaganda music that was officially sanctioned. Historian Shirli Gilbert shows that there was a wealth of different music-making during this period, including secret sessions by Jewish musicians and others, that managed to evade official scrutiny.

In this first episode, she explores the music of the Jewish Culture League, as well as the work of Lukraphon and Semer, two Jewish record labels active at this time. This includes a huge range of works recorded in Nazi Germany, from orchestral pieces to cabaret songs to religious singing of enormous beauty.

Lots of excerpts from, and accounts of, artists who were recorded on those record labels, two of whom I looked up on YouTube
Dora Gerson
Israel Bakon