Bakhshi music is passed on through traditional master-pupil training, which is restricted to male family members or neighbours, or modern methods, in which a master trains a wide range of students of both genders from diverse backgrounds.
Unlike more ambitious collectors such as Baron Thyssen-Bornemisza, whose broad range of master-paintings is housed at the imposing Villahermosa Palace in Madrid, Mr Beyeler does not claim to have mounted an exhaustive panorama that takes in every movement in 20th-century art.