I always thought it translated as ' Night Music ' which might make more sense - a version was fitted on the ME163 with a battery of upward firing rockets - once armed, as I thought in all these systems, they fired automatically by dint of a Selenium ( ie camera light meter ) sensor as soon as the attacker got under the 'shadow' of a bomber.
From what I've read it worked surprisingly well, I suppose it let the pilot get on with flying / surviving...