In order to create longer works without using tonality, the composer Arnold Schoenberg increasingly resorted to __________.

Identify the two styles of organum composed by Leoninus

A) ligature and conductus B) occursus and oblique C) organum purum and discant D) modal and duplum

What new development emerged in music between the two world wars as a result of Hindemith's music for Mathis der Maler?

What will be an ideal response?