On May 12, the melogue Variazioni su Orfeo will be performed in Teatro Ponchielli di Cremona.   To celebrate 450 years since the birth of Claudio Monteverdi, the Monteverdi Festival in Cremona devotes an evening to the readings that through the centuries have accompanied the myth of Orfeo, on an original drama by Valter Malosti, who on stage talks with dancer …