In October 2003, I had an installation of EffecTV, a realtime video effect processor, at Aoyama CPF Studio. EffecTV has a number of visual effects and I put a keyboard to allow participants to change the effects at first, but the curator of the installation asked me to put some good interface instead of the keyboard, because it's so messy.
Therefore, I planned to create a channel changer like old TVs, using a rotary switch sounds "click-click". Actually, Maywa-Denki, a famous media artist in Japan, already released a TV remote controller with an old TV style rotary channel changer, "Gacha-con", but it is an infra-red TV controller and takes some hack to connect to the EffecTV machine. This is the reason why I created this USB rotary channel changer.