So pretty much it is a sound genjutsu but isn't classified as a sound genjutsu, just a normal genjutsu. You use sound by humming and tapping their feet at the same time, this creates the genjutsu. It creates a situration where the person this is used on can't control themselves, and start to move to the beat of the humming and tapping of the users feet. It's a pretty neat technique, the six hand seals are hefty though.
Sorry for the late reply btw.