Zdeněk Liška was a Czech composer who produced a large of number film scores across a prolific career that started in the 1950s. He was revelatory in his contribution to the development of electronic music in the 1950s. I had Song of the Siren lined up as my last tune at the Cuentacuentos in Los Silos on Saturday, but the sound got cut…grrrrrrrr!
More info about him here
Enjoy