The present disclosure provides improved octave key systems for use with (e.g., incorporation into) an instrument in the bassoon family.

B/F tenor trombone for children, comprising a sound part and a slide, composed of an inner slide and an outer slide being movably disposed thereon, wherein the total length formed by sound part and slide has a tubing length L.sub.s1+L.sub.s2+L.sub.s3+L.sub.z1+L.sub.z2+L.sub.z3, and wherein in the 1st register, the slide has a tubing length L.sub.z1+L.sub.z2+L.sub.z3 of less than 150 cm, and wherein the sound part has a tubing length L.sub.s1+L.sub.s2+L.sub.s3 of more than 125 cm.

A closed end woodwind instrument is provided designed for use with an inventive teaching method, notation system, and repertory. The combined system is designed for teaching basics of music and to provide a simple, convenient and enjoyable instrument. The instrument is formed of a body, which defines an internal cavity. A mouthpiece has a windway that connects to the internal cavity. The windway allows a user to blow air through the mouthpiece into the cavity and through the instrument. A labium is positioned along the windway, such that it splits air flowing through the windway. A plurality of tone holes are in communication with the internal cavity to allow air to exit the cavity. Upon blocking or opening these tone holes, different tones can be produced by the instrument.

A closed end woodwind instrument is provided designed for use with an inventive teaching method, notation system, and repertory. The combined system is designed for teaching basics of music and to provide a simple, convenient and enjoyable instrument. The instrument is formed of a body, which defines an internal cavity. A mouthpiece has a windway that connects to the internal cavity. The windway allows a user to blow air through the mouthpiece into the cavity and through the instrument. A labium is positioned along the windway, such that it splits air flowing through the windway. A plurality of tone holes are in communication with the internal cavity to allow air to exit the cavity. Upon blocking or opening these tone holes, different tones can be produced by the instrument.

A closed end woodwind instrument is provided designed for use with an inventive teaching method, notation system, and repertory. The combined system is designed for teaching basics of music and to provide a simple, convenient and enjoyable instrument. The instrument is formed of a body, which defines an internal cavity. A mouthpiece has a windway that connects to the internal cavity. The windway allows a user to blow air through the mouthpiece into the cavity and through the instrument. A labium is positioned along the windway, such that it splits air flowing through the windway. A plurality of tone holes are in communication with the internal cavity to allow air to exit the cavity. Upon blocking or opening these tone holes, different tones can be produced by the instrument.

A closed end woodwind instrument is provided designed for use with an inventive teaching method, notation system, and repertory. The combined system is designed for teaching basics of music and to provide a simple, convenient and enjoyable instrument. The instrument is formed of a body, which defines an internal cavity. A mouthpiece has a windway that connects to the internal cavity. The windway allows a user to blow air through the mouthpiece into the cavity and through the instrument. A labium is positioned along the windway, such that it splits air flowing through the windway. A plurality of tone holes are in communication with the internal cavity to allow air to exit the cavity. Upon blocking or opening these tone holes, different tones can be produced by the instrument.

A pacifier or a teething device comprising of a mouth-guard having a body, said body having a front-surface, a back-surface, and a thickness wherein said thickness makes an interior space; a mouth-piece having a proximal end to be placed in a mouth and a distal end connected to said front-surface of said mouth-guard; an instrument embedded in said interior space or being connected to said back-surface of said mouth-guard or being connected to the front-surface of the said teething device; and a handle connected to said back-surface of said mouth-guard or connected to said instrument.

A mute equipment capable of controlling a breath pressure and reducing the volume of the sound during a performance state in normal manner, an adapter thereof and the wind instruments equipped with them, are characterized in that it the mute equipment capable of controlling a breath pressure is to be attached to the blowing section of the wind instruments, wherein the equipment has a hole to release the breath and a section of restricting a wind way width. The mute equipment capable of controlling a breath pressure may be further characterized in that the equipment has a section of adjusting a breath volume to adjust the size of the hole to release the breath. The mute equipment capable of controlling a breath pressure may be further characterized in that the section of adjusting a breath volume can use as the section of restricting the wind way width.

A mute equipment capable of controlling a breath pressure and reducing the volume of the sound during a performance state in normal manner, an adapter thereof and the wind instruments equipped with them, are characterized in that it the mute equipment capable of controlling a breath pressure is to be attached to the blowing section of the wind instruments, wherein the equipment has a hole to release the breath and a section of restricting a wind way width. The mute equipment capable of controlling a breath pressure may be further characterized in that the equipment has a section of adjusting a breath volume to adjust the size of the hole to release the breath. The mute equipment capable of controlling a breath pressure may be further characterized in that the section of adjusting a breath volume can use as the section of restricting the wind way width.

A mute equipment capable of controlling a breath pressure and reducing the volume of the sound during a performance state in normal manner, an adapter thereof and the wind instruments equipped with them, are characterized in that it the mute equipment capable of controlling a breath pressure is to be attached to the blowing section of the wind instruments, wherein the equipment has a hole to release the breath and a section of restricting a wind way width. The mute equipment capable of controlling a breath pressure may be further characterized in that the equipment has a section of adjusting a breath volume to adjust the size of the hole to release the breath. The mute equipment capable of controlling a breath pressure may be further characterized in that the section of adjusting a breath volume can use as the section of restricting the wind way width.