Abstract: Embodiments of a quick-release sustain block, and associated guitar tremolo assembly and method, are disclosed. The sustain block extends along a main axis from a distal end to a proximal end. The proximal end is affixable to a bridge plate of the tremolo assembly. Linearly straight string retention bores extend through the sustain block in parallel with the main axis, and have a ball capture segment and a string housing segment. Each ball capture segment is located between the string housing segment and distal end. The string retention bores have a ball detent defined between the ball capture segment and string housing segment. The string retention bores are in communication with a respective string transfer slot laterally thereof. The forward face of the sustain block is configured to be oriented toward a headstock of a guitar when the bridge plate is in pivotable engagement with the guitar.

Abstract: Embodiments of a quick-release sustain block, and associated guitar tremolo assembly and method, are disclosed. The sustain block extends along a main axis from a distal end to a proximal end. The proximal end is affixable to a bridge plate of the tremolo assembly. Linearly straight string retention bores extend through the sustain block in parallel with the main axis, and have a ball capture segment and a string housing segment. Each ball capture segment is located between the string housing segment and distal end. The string retention bores have a ball detent defined between the ball capture segment and string housing segment. The string retention bores are in communication with a respective string transfer slot laterally thereof. The forward face of the sustain block is configured to be oriented toward a headstock of a guitar when the bridge plate is in pivotable engagement with the guitar.

Abstract: A device for setting the tension in a string of a stringed musical instrument whereby a musician can instantly retune the string to play either one of two predetermined notes by merely actuating a lever. The device is preferably attached between the tailpiece or body of the instrument and an end of the string. The element of the tuner to which the string is attached (a string anchor) moves with a rectilinear motion to change the string tension. Two embodiments are disclosed, one of which used a rotating cam to position the string anchor, and the other of which uses a two-bar linkage to position the string anchor.