Mario de Pietro 's orchestra, the ' Estudiantina ', is solely a broadcasting orchestra. It is composed of an Unusual combination of stringed and fretted instruments of every type, and has more than justified the aim for which it was formed. Since de Pietro arrived in London in 1920, he has appeared as a solo artist at leading halls throughout the country. He has also been broadcasting since 1925. During 1926 he was regularly on the air with his first band, which he formed for the New Prince's restaurant. The engagement lasted for nearly a year, when he decided to continue as a solo artist. For the last five years he has appeared with Powis Pinder 's concert party ' Sunshine ' at the Summer Theatre, Shanklin. His last venture, the ' Estudiantina ', has been regularly on the air since it was formed more than a year ago. He televised for the first time in January at Alexandra Palace.