This will all be an attempt, a work in progress.
One point, though: the title comes from the final “duet” of Richard Strauss and Hugo von Hofmannsthal’s Elektra. As their brother Orest sweeps through the palace in victory, Chrysothemis asks her sister if she can hear the clamor of rebellion within, the rejoicing, the slaughter, the lighting of a thousand torches. Elektra retorts, “Can I not hear it? Can I not hear the music? Surely it comes from me!”