Abstract: A method for generating a music file for recording user performance may include: detecting, by a sensor, an event indicating a status change of an execution device of the keyboard instrument; generating, by the sensor, a signal corresponding to the detected event; receiving, by a processor, the signal; and generating, by the processor, a music file based on the signal. In some embodiments, the execution device may include a weight lever. The weight lever may a concrete structure in the keyboard instrument to simulate a rebound force generated by hammer striking on string, by striking on an elastic structure. In some embodiments, a rebound force for a first weight lever may be different from a rebound force for a second weight lever by adjusting parameters of the elastic structure or the weight lever.

Abstract: An upright keyboard instrument reduced in depth dimension and compact as a whole. Damper levers each extend in a vertical direction and are pivotally movably supported at or in the vicinity of a longitudinal center thereof, in a side-by-side arrangement in a left-right direction at a location rearward of actions. A damper rod extends in a left-right direction. A pedal rod extends in the vertical direction and is disposed forward of the damper levers, so as to be moved upward by depression of a pedal. A damper lever drive mechanism is provided between a longitudinal end of the damper rod and an upper end of the pedal rod and drives lower portions of the damper levers such that the lower portions are pressed rearward by moving the damper rod rearward in accordance with upward movement of the pedal rod.

Abstract: A muffler mechanism that reduces the volume of an acoustic piano without altering the feel of the piano to a human pianist. One embodiment includes a highly configurable piano muffler kit that may be mounted into pianos of various models. The muffler mechanism includes a cushioning member, which muffles the sound of the hammer striking the string and reduces the volume of the sound made by the string's vibration. The muffler mechanism also includes shims that may be used to position the cushioning member between a hammer let-off position and the string. This may allow for muffled piano playing without a noticeable change in the resistance of the keys. The muffler mechanism is mounted using brackets with a relatively small footprint. This allows the piano muffler to be installed without removing all of the dampers.

Abstract: Dampers are spaced from and brought into contact with associated sets of strings for defining piano tones, and the vibration absorbing capability is to be equalized among the dampers by regulating the weight, wherein at least one of the damper head and the damper lever is formed of powder-containing synthetic resin so that the damper is economical, durable and free from the environmental pollution.

Abstract: A mechanism including a sustaining bar (112) directly engaging a row of damper supports (104); and a harmonic bar directly engaging a row of escapements (13) each of which is combined with one of the damper supports. Both bars (111, 112) are actuated by a common pedal (1) to which they are connected by a linkage system (18, 20, 5) linking the movement of the harmonic bar (111) to that of the sustaining bar (112) so that when the pedal is depressed beyond a so-called "harmonic" position in which the pedal is half-depressed, the sustaining function is applied to all the notes whose keys are depressed, and once the pedal has been fully depressed and is therefore in a so-called "forte" position, then very slightly released, all the escapements are in engagement with the harmonic bar.

Abstract: The invention relates to a damper mechanism for upright piano, comprising a damper felt mounted on a damper wood, and in which the damper wood is equipped with a guide stem directionally adjusted perpendicularly to the plane of the strings and guided to move reciprocally in a bore of a block fixed on a support independent of the mechanism controlling the hammers. Members are interposed between the key and the damper guide stem for reciprocally moving the latter in response to the movement of the key.

Abstract: A damper assembly for pianos is provided with at least two damper felt sections disposed to its damper head in such a manner to enable dual staged damping action, only the large amplitude components of string vibration being damped in the first stage, and the remainder of the string vibration being almost fully damped in the second stage. Stable damping effect on the string and minimized jumping of the damper felts are attained in particular in the bass range.

Abstract: In the construction of a damper assembly for musical instruments, the conventionally used swingable damper lever for operationally relating a key to an associated damper wire is omitted and the swing movement of the key is either directly and indirectly converted into a corresponding fairly vertical movement of an elongated damper holder via a balance weight disposed to the bottom end of the damper holder in order to avoid undesired influences caused by swinging movement of any mechanical parts. Use of a plate type damper holder further advantageously prevents undesirable twist and dancing of the damper holder. Simultaneous, even and well-controlled pressure contact of the damper head with the vibrating string assures ideal damping and acoustic effects and use of detachable balance weight enables free adjustment of touch on the key.

Abstract: In the construction of a damper assembly of pianos, the conventionally used long-sized damper wire is replaced by a pair of separate short-sized lever components operationally related to each other via an additional intermediate damper lever for stabilized action of the assembly even without provision of the conventionally used guide rail. A shorter length damper wire joins the upper lever component to the damper head.

Abstract: A damper for pianos comprises a damper block arranged on a pivotable lever or rod and is limited substantially on all sides by convex outer surfaces, and a damper head cooperating with the piano wire and engageable with the damper block through complementary curved surfaces.

Abstract: A piano mechanism for correlating the movement of the damper with the movement of the hammer consists of a hammer lifter connected between the hammer arm and the damper arm at a location on the side of its axis opposite to that of the damper itself.

Abstract: In the construction of a damper assembly of pianos, the conventionally used long-sized damper wire is replaced by a pair of separate short-sized lever components operationally related to each other via an additional intermediate damper lever for stabilized action of the assembly even without provision of the conventionally used guide rail. A shorter length damper wire joins the upper lever component to the damper head.