It is made possible to give prevailing torque to an adjustment bolt in a simple manner without troublesome adjustment work. An anti-loosening adjustment bolt assembly includes: a cylindrical pipe (6) adapted to be fitted on the screw shaft (2a) of the adjustment bolt (2); and a nut (7) having a threaded hole for allowing the screw shaft (2a) to be threadably mounted thereon; the bottom of the nut (7) includes a recess (7a) adapted to allow the upper end of the cylindrical pipe (6) to be fitted therein; the inner peripheral surface of the recess (7a) is a taper surface decreasing in diameter toward the interior; and the axis of the taper surface is slightly eccentric from the axis of the threaded hole such that, when the nut (7), threadably secured to the screw shaft (2a), is screwed toward the cylindrical pipe (6), a circumferential portion of the eccentric taper surface comes into pressure-contact with the upper end of the cylindrical pipe (6) and the axis (Q) of the threaded hole of the nut (7) is eccentric and/or inclined from the axis (O) of the screw shaft (2a) to generate prevailing torque depending on the amount of tightening of the nut (7) on the adjustment bolt (2).

It is made possible to give prevailing torque to an adjustment bolt in a simple manner without troublesome adjustment work. An anti-loosening adjustment bolt assembly includes: a cylindrical pipe (6) adapted to be fitted on the screw shaft (2a) of the adjustment bolt (2); and a nut (7) having a threaded hole for allowing the screw shaft (2a) to be threadably mounted thereon; the bottom of the nut (7) includes a recess (7a) adapted to allow the upper end of the cylindrical pipe (6) to be fitted therein; the inner peripheral surface of the recess (7a) is a taper surface decreasing in diameter toward the interior; and the axis of the taper surface is slightly eccentric from the axis of the threaded hole such that, when the nut (7), threadably secured to the screw shaft (2a), is screwed toward the cylindrical pipe (6), a circumferential portion of the eccentric taper surface comes into pressure-contact with the upper end of the cylindrical pipe (6) and the axis (Q) of the threaded hole of the nut (7) is eccentric and/or inclined from the axis (O) of the screw shaft (2a) to generate prevailing torque depending on the amount of tightening of the nut (7) on the adjustment bolt (2).

A device integrally joined with the ported opening of a musical bass drum resonant drumhead for regulating the amount of vibrating airflow passing through the inside of a bass drumshell and continuing through the ported opening for effectively controlling undesirable higher frequency drum sounds precipitated by the airflow produced upon the striking of the batter head.

An electronic-drum module for connection to one or more electronic-drum pads is provided. The module includes an electronic display; a first memory storing audio files for playback when the playback is triggered by a signal received from a pad; and one or more processors coupled to the display and the memory. The processors are configured receive an instruction to transfer a set of samples. The set of samples is associated with a priority-instruction and includes a first subset of samples and a second subset of samples. The processors are also configures to transfer the first subset of samples from a second memory to the first memory based on the priority-instruction before transferring the second subset of samples and to transfer the second subset of samples from the second memory to the first memory.

The present disclosure is directed to a hand-held musical instrument comprising a first metal plate or portion of a metal plate configured to emit a sound having a first note when struck with a mallet, and a second metal plate or portion of a metal plate configured to emit a sound having a second note when struck with a mallet, with the first and second plates/portions being connected by a handle that is sized and configured to be held by a human hand. The instrument may be held in one hand and the plates/portions struck with a mallet using the other hand. Embodiments of the musical instrument produce complementary notes that are free of interference from one another and that each have a gradual decay rate, leading to a relatively long sustain time.

Provided are an electronic percussion instrument and a hit detection method. An overhang portion constituting the outer edge part of an edge frame is positioned further radially outward than the outer edge of a bow frame. Consequently, when the overhang portion is hit, the vibration resulting from the hit is detected by an edge sensor attached to the edge frame. In this way, it is possible to detect whether the overhang portion (the edge portion of an electronic cymbal has been hit by means of vibration detection by the edge sensor instead of by means of pressure detection by a sheet sensor.

Drum hardware tools are described. Some implementations may include a tension rod hardware tool designed for assembling/installing/setting up and/or disassembling/uninstalling tension rods. Some implementations may include a drum wing nut hardware tool designed for assembling/installing/setting up and/or disassembling/uninstalling drum hardware wing nuts.

Drum hardware tools are described. Some implementations may include a tension rod hardware tool designed for assembling/installing/setting up and/or disassembling/uninstalling tension rods. Some implementations may include a drum wing nut hardware tool designed for assembling/installing/setting up and/or disassembling/uninstalling drum hardware wing nuts.

The present disclosure is directed to a hand-held musical instrument comprising a first metal plate or portion of a metal plate configured to emit a sound having a first note when struck with a mallet, and a second metal plate or portion of a metal plate configured to emit a sound having a second note when struck with a mallet, with the first and second plates/portions being connected by a handle that is sized and configured to be held by a human hand. The instrument may be held in one hand and the plates/portions struck with a mallet using the other hand. Embodiments of the musical instrument produce complementary notes that are free of interference from one another and that each have a gradual decay rate, leading to a relatively long sustain time.

An electronic percussion instrument capable of simulating a rendition of an acoustic percussion instrument is provided. The electronic percussion instrument includes a housing, a percussion surface attached to the housing, a pressure sensor disposed on a central section of the percussion surface on a side of the back surface and configured to detect pressing against the central section, a head vibration sensor disposed on a peripheral section of the percussion surface on the side of the back surface and configured to detect vibrations of the peripheral section, and a rim vibration sensor disposed at a position overlapping the head vibration sensor when seen in a plan view of the percussion surface and configured to detect vibrations of the housing.