Just watched the first episode of BBC 4's
Tunes for Tyrants with Suzy Klein. The first one looks at the music of Weimar Germany and Lenin-period Russia, with modern performances of the songs alongside archive footage.
There's a very dark moment when she and a German cabaret singer perform a late 1920s song taking the piss out of the Nazis but with lyrics that today are deeply discomforting, followed shortly after by a very sensitive discussion of the Horst-Wessel Lied.
On a lighter part of the show, the performance of Camille Saint-Saëns'
Swan on piano and theremin is sublimely beautiful and worth catching in itself. Oh, and she destroys a piano with a sledgehammer at some point.