I also noticed in one of the demos that it his a wrong note: https://youtu.be/dYloQf7h0QY?t=60 https://youtu.be/dYloQf7h0QY?t=60 I suspect if you're not in a

I also noticed in one of the demos that it his a wrong note: https://youtu.be/dYloQf7h0QY?t=60 https://youtu.be/dYloQf7h0QY?t=60 I suspect if you're not in a well lit room with cool white lighting, there might be issues with reading the correct note. If you're in a stage setting with flash lights all across the spectrum, it might really struggle to distinguish the notes. Fun little device though! Could certainly see it in a science museum or hands on art exhibit.