Chasydyzm do Psalmów 47:8

2. But this aspect is impossible to attain except when one raises the aspect of the Malkhut (Kingship) of holiness from exile among the nations. For now the Malkhut and the rule is by the nations, and for this reason their idolatries are referred to as “Elohim,” [“You shall have no other Elohim besides me.” (Ex. 20)] for they nurse from the aspect of Malkhut, which is called Elohim, as is written (Ps. 74): "Elohim is my King of old;" and when one raises the aspect of Malkhut from among the nations, then is fulfilled: "For Elohim is the King of all the earth" (there 47):

5. Know this: by means of melody, a Tzaddik like Moses can raise the souls fallen into the heresy of the empty void. And know: every kind of wisdom in the world has melody and music which are unique to it, and each wisdom is derived from its particular music. This is the meaning of "skilful song" (Psalms 47:8) - each song is associated with particular skill and wisdom.

And this is: "For Elohim is the King of all the earth; sing praises in a skilful song;" for then, when Hashem will be king over all the earth and the Malkhut of holiness shall be raised up, then "sing praises in a skilful song," i.e. the chazannim and the singers shall be in knowledge and in intelligence through the Malkhut of holiness’s going up, and they shall receive song from its root in holiness, which is like knowledge and brains of the Malkhut of holiness: