Sound dampener for stringed instruments adapted to allow the musician to switch from the muffled sound effect, typical of the palm muting technique, to the natural sound of the strings, whenever and as desired, rendering the musical performance continuous and smooth; it comprises: a body (10) being produced with clearance-free elements avoiding resonance effects; said body (10) being adapted to be engaged, through flexible bodies (12), in contact with the string retaining means (20) of an instrument (200), which serve as support; said body (10), when engaged on said instrument (200), being adapted to take a natural position, without contact with the strings (22) of said instrument (200), keeping the sound of said strings (22) intact; a muffling element (11), engaged at the end of the free portion (10), when in contact with at least one of said strings (22), adapted to dampen the vibrations of said strings (22) and returning a muffled sound.

Sound dampener for stringed instruments adapted to allow the musician to switch from the muffled sound effect, typical of the palm muting technique, to the natural sound of the strings, whenever and as desired, rendering the musical performance continuous and smooth; it comprises: a body (10) being produced with clearance-free elements avoiding resonance effects; said body (10) being adapted to be engaged, through flexible bodies (12), in contact with the string retaining means (20) of an instrument (200), which serve as support; said body (10), when engaged on said instrument (200), being adapted to take a natural position, without contact with the strings (22) of said instrument (200), keeping the sound of said strings (22) intact; a muffling element (11), engaged at the end of the free portion (10), when in contact with at least one of said strings (22), adapted to dampen the vibrations of said strings (22) and returning a muffled sound.

The Autoharp Keyboard Mechanism is engaged with an autoharp having strings. Octave bars having piano-like keys are slidingly engaged with pins extending from the top surface of the autoharp and are located above the strings. Damping brackets are also slidingly engaged with the pins and are located beneath the octave bars and beneath the strings. Coil springs are arranged around each of pins and are located beneath the octave bars and the damping brackets. Adjustable length spacers are engaged with the octave bars and with the damping brackets, one at each end of the octave bars and damping brackets. The adjustable length spacers are located between the octave bars and the damping brackets, and are engaged with the octave bars using threads. Holders are configured to retain the octave bars on the pins.