One of the foremost composers of the 20th century. Some recordings available on ubuweb. His folk songs are more then arrangements (and here is Voci a later piece which he subtitled folksongs 2). The series of sequenzas (e.g. viola, guitar) for solo instruments are a fantastic way to learn more about the instruments and imaginative ways to write for them. Coro integrates voices into the orchestra. His Sinfonia, particularly the 3rd movement, was discussed extensively.