Abstract: A capo for fretting the neck of a stringed instrument, comprising a barr member for fretting the strings, a housing member coupled to the barr member, a forcing member for engaging the neck on a side of the neck substantially opposite the strings, a slide bar coupled to the forcing member, first biasing member disposed between the housing and the slide bar and operable to bias the slide bar in a direction away from the neck, a braking lever pivotally engaged with the housing, the braking lever having an opening through which the slide bar passes and second biasing member operable to bias the braking lever in a direction away from the neck. Other systems, devices and methods are disclosed.