A support assembly including a support rotatably disposed with respect to a frame, a repetition lever hinge mounted to the support, and a repetition lever supported by the repetition lever hinge and rotatably disposed with respect to the support, wherein the repetition lever has a contact surface and the contact surface contacts a hammer shank roller provided to a hammer shank for rotating a hammer, and the repetition lever hinge is mounted to the support in a mounting direction that crosses with a tangent-line direction of a line tangent to the hammer shank roller at the contact between the hammer shank roller and the contact surface.

A keyboard instrument includes keys containing a woody material and including natural note keys and accidental note keys. Each natural note key includes a first playing surface played to produce a natural note. Each accidental note key includes a second playing surface played to produce an accidental note. The first playing surface has a first colorimetric value representing a first color, and the second playing surface color has a second colorimetric value representing a second color. Each of the first and second colorimetric values is derived in accordance with an SCI method in an L*a*b* color space. The first and second colorimetric values satisfy at least one of: a first condition: E*ab17, or a second condition: H*<15 and 1.7<L*/c*<1.7. The first and second playing surfaces differ from each other in at least one of optical reflectance or surface roughness.

A keyboard instrument includes keys containing a woody material and including natural note keys and accidental note keys. Each natural note key includes a first playing surface played to produce a natural note. Each accidental note key includes a second playing surface played to produce an accidental note. The first playing surface has a first colorimetric value representing a first color, and the second playing surface color has a second colorimetric value representing a second color. Each of the first and second colorimetric values is derived in accordance with an SCI method in an L*a*b* color space. The first and second colorimetric values satisfy at least one of: a first condition: E*ab17, or a second condition: H*<15 and 1.7<L*/c*<1.7. The first and second playing surfaces differ from each other in at least one of optical reflectance or surface roughness.

A musical instrument includes an exterior member comprising an isotropic fiberboard. The isotropic fiberboard includes a base surface that has a first region and a second region. A surface roughness of the first region differs from a surface roughness of the second region; and a degree of reflection of the first region differs from a degree of reflection of the second region.

A musical instrument includes an exterior member comprising an isotropic fiberboard. The isotropic fiberboard includes a base surface that has a first region and a second region. A surface roughness of the first region differs from a surface roughness of the second region; and a degree of reflection of the first region differs from a degree of reflection of the second region.

The present disclosure provides a key measuring device for measuring the touchweight parameters of one or more keys of a keyboard instrument, such as a piano. The key measuring device may include a plunger configured to contact a top surface of a key and move in a direction substantially perpendicular to said top surface and a force sensor coupled to the plunger and configured to provide an output signal indicative of the force between the plunger and the top surface of the key. Also provided are systems and methods for measuring touchweight parameters of a key.

The present disclosure provides a key measuring device for measuring the touchweight parameters of one or more keys of a keyboard instrument, such as a piano. The key measuring device may include a plunger configured to contact a top surface of a key and move in a direction substantially perpendicular to said top surface and a force sensor coupled to the plunger and configured to provide an output signal indicative of the force between the plunger and the top surface of the key. Also provided are systems and methods for measuring touchweight parameters of a key.

A weight and method for installing the same in a piano key or damper, the method including: providing a weight formed from material including a metal having a density greater than 12 grams per cubic centimeter; inserting the weight into the piano key or damper. The material including at least a metal sufficiently strong to form a thread on a surface thereof; and wherein the weight has a thread formed on the surface. The material is resistant to corrosion at least at ambient temperatures The weight being a cylindrical member made of lead; and at least one outer layer of an inert metal material or a corrosion-resistant metal material covering the cylindrical member.

A weight and method for installing the same in a piano key or damper, the method including: providing a weight formed from material including a metal having a density greater than 12 grams per cubic centimeter; inserting the weight into the piano key or damper. The material including at least a metal sufficiently strong to form a thread on a surface thereof; and wherein the weight has a thread formed on the surface. The material is resistant to corrosion at least at ambient temperatures The weight being a cylindrical member made of lead; and at least one outer layer of an inert metal material or a corrosion-resistant metal material covering the cylindrical member.