Rehearsal: Lullaby

The user draws in air, while channeling chakra into their vocal chords, afterwards releasing a song that naturally travels with the speed of sound, directly to an organism with an eardrum lulling their brain similar to most genjutsu, exposure to this song will result in the target passing out for a week at least, when used in combat this will leave the target extremely vulnerable, this song does seem to affect the user.