1. Radio opera performances were adaptated by Bronsgeest to suit broadcasting requirements.2. In 1923 the Royal Opera House ( London ) chose it for their first complete radio opera broadcast. 3. The earliest radio operas were broadcast in the 1920s and followed earlier broadcasts of plays with incidental music. 4. The latter's " simplicity of means and effective characterization fulfil perfectly the requirements for radio opera ". 5. Around this time, he also became interested in CBC Radio opera programming, which was growing in popularity. 6. He produced works for orchestral ensembles as well as electronic and multimedia music, and a series of radio operas . 7. His one act radio opera " To the Museum " got a special mention of the Jury at 1991 Prix Italia. 8. In 1969 " Vasheto prisatvie " ( Your Presence ) was the earliest Bulgarian radio opera to be broadcast. 9. In 1951, he sang in the world premiere of Hans Werner Henze's radio opera " Ein Landarzt ". 10. In 1952 he conducted the BBC Symphony Orchestra in the world premiere of Franz Reizenstein's radio opera " Anna Kraus ".