Circle Guitar’s semi-automation frees your hand to interact with the instrument in new ways, such as muting strings to create unusual timbres, or devising new chord shapes that use two hands.

This guitar, on the other hand, needs only a single musician but can create impressive walls of sound on its own thanks to some clever engineering. Called the Circle Guitar and created by [Anthony ...

But perhaps the most eye-catching innovation of the entire show was the Circle Guitar – a new innovation developed by Circle Instruments, which has been described as “a hyperinstrument that ...