Patent ID: 7786373

Claim:
Device for automatic tuning of a string instrument, in particular, a guitar, comprising: a) a detection device for detecting a tone generated when a string is struck as well as for the output of a digital signal corresponding to the detected tone, b) a memory device for storing preset digital signals, which correspond to a desired tone, c) a comparison device for comparing the digital signal output by the detection device with a digital signal stored in the memory device and corresponding to the desired tone, d) an adjustment device for changing the tension of the strings, e) at least one drive for driving the adjustment device, f) a controller, which is connected to the comparison device and which controls the one or more drives with reference to a deviation determined in the comparison device between signals representing the generated tone and the desired tone, and g) at least one electrically conductive string selected from a string composed of an electrically conductive material, a string wound with an electrically conductive material and a string coated with an electrical conductive material, wherein the at least one electrically conductive string extends longitudinally between the body and head end of the instrument and includes a first, body end operatively coupled to a power supply source and an opposite, head end operatively coupled to the adjustment device.