Sonic Research is a small company based in Nevada, USA. It specializes in the manufacture of advanced electronic products and manufactures, among other things, a single and unique product for guitarists, bassists and musicians of all stripes. A tuner! Yes, but not just any, the best tuner on the market for many years. Indeed the ST-300 is the reference of its kind due to its extreme speed and its very high precision. Whatever your needs (specific tunings, temperaments, opens etc...) Sonic Research offers you the best of its kind.