HERMANN SCHROEDER (1904-84) IS ONE OF THE LEADING GERMAN ORGAN COMPOSERS OF THE 20TH CENTURY. "MUSIC FOR ORGAN" WAS WRITTEN IN 1984 AND EXPLORES THE POSSIBILITIES OF TONALITY: THE THREE MOVEMENTS ARE WRITTEN IN DIFFERENT KEYS, NAMELY FIVE-, SEVEN- AND TWE TOCCATA PENTATONICA - SCALA HEPTATONICA - CIACONA DODEKATONICA