This is a very nice version of this effect. I like the movement up and down as it avoids the "static
hanging" look of other versions. Took a star of due to noise factor. While not overly loud there is
no way this could be performed without music cover. Even in a large room.
There is a
reason the demo vid has a music track overlay. Nice effect but just know you will need to do this to
music which this effect lends itself to a silent presentation anyway.