Harmony and Collectivity

Harmony entails a balance between Unity and Multiplicity, i. e. the differentiation of its components is as essential as is their integration.  Thus, to whatever extent Schopenhauer regards Harmony as intrinsic to Music--he does not to agree with Rousseau that it is a gimmick--he is committed to recognizing that Music is an inherently collective Art.  Now, in his system, Will is the principle of Unity, and Individuation is the principle of Multiplicity.  Thus, a musical performance qua collective, does not "copy" Will, as Schopenhauer proposes, but effects a combination of Will and Individuation.  However, the inferior status in his system of Individuation prevents him from appreciating that capacity of Music, and from recognizing that Music might be an inherently collective Art.