The creator is having some issues getting verified to comment on ProductHunt so I'll apply his short description here!
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ViVi controls addressable LEDs to make music reactive lightshows like no automatic controller ever has before. ViVi is the first LED controller that provides high quality music synchronized lightshows and can be set up by anyone with zero programming and electrical knowledge required. It does all of its own processing so it does not need to be connected to a computer or phone to work. ViVi does have an app that can adjust its settings, but it's not required to be connected for ViVi to work.
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