In RA format
Any research on Raymond Berthaud is as yet missing. He sang a lot on the French radio
throughout the 1940s; as far as singing on stage, I find him as a member of the Opéra de Marseille in 1938, of the
Opéra de Monte-Carlo in 1941, and in Montélimar in 1944 – which hints to a career in the South-East of
France. Of course, his association with the Monte Carlo opera reminds of Louis Berthaud, who was often referred to as "Monsieur Berthaud de l'Opéra de
Monte-Carlo" around 1910; but whether or not they were relatives is impossible to say as long as the biographies of both
singers are largely mysterious.
Raymond Berthaud never made any commercial records; whether, besides the complete Carmen from which the above excerpt has been taken, any
of his radio appearances has been preserved, is another question that I can't answer, at least I haven't seen any.