And furthermore: shophar holekh ֣, re-vi’a ֗, darga ֧, trei ta’amei ֦. At the time that the wicked are destroyed from the world, prayer ascends in music of four types, which are: simple song – which is Y, double song – which is YQ, triple song – which is YQV, and quadruple song – which is YQVQ.
In the Name of YQVQ, prayer, which is the Shekhinah, ascends.
Torah is with music, the Shekhinah is with music, Israel goes up from exile with music. It is this that is written: (Ex. 15:1) Then (az) will sing Moses, and the Children of Israel, this song to Y”Y...