阅读说明：本技术 一种电子乐器 (Electronic musical instrument ) 是由 陈岳 于 2021-03-15 设计创作，主要内容包括：本发明公开了一种电子乐器。该乐器包括：多个磁感应区,其中每个磁感应区配置成在受到触发时产生与其关联的第一磁感应信号；音源存储器,其配置用于存储与所述每个磁感应区对应的音源数据；输出单元,其配置用于输出与所述音源数据对应的声音信号；以及控制单元,其配置用于：根据所述第一磁感应信号确定关联的磁感应区；从所述音源存储器获取与所述关联的磁感应区对应的音源数据；以及控制所述输出单元输出与所述音源数据对应的声音信号。基于本发明方案设计的电子乐器可以实现传统乐器的电子化和小型化,其具有较高灵敏度,并且由此改善了乐器的演奏性能和提高了使用者的学习乐趣。(The invention discloses an electronic musical instrument. The musical instrument includes: a plurality of magnetic induction regions, wherein each magnetic induction region is configured to generate a first magnetic induction signal associated therewith when triggered; an audio source memory configured to store audio source data corresponding to each of the magnetic induction zones; an output unit configured to output a sound signal corresponding to the sound source data; and a control unit configured to: determining an associated magnetic induction zone according to the first magnetic induction signal; acquiring sound source data corresponding to the associated magnetic induction area from the sound source memory; and controlling the output unit to output a sound signal corresponding to the sound source data. The electronic musical instrument designed based on the scheme of the invention can realize the electronization and miniaturization of the traditional musical instrument, has higher sensitivity, and thereby improves the performance of the musical instrument and the learning pleasure of users.)

1. An electronic musical instrument comprising:

a plurality of magnetic induction regions, wherein each magnetic induction region is configured to generate a first magnetic induction signal associated therewith when triggered;

an audio source memory configured to store audio source data corresponding to each of the magnetic induction zones;

an output unit configured to output a sound signal corresponding to the sound source data; and

a control unit configured to:

determining an associated magnetic induction zone according to the first magnetic induction signal;

acquiring sound source data corresponding to the associated magnetic induction area from the sound source memory; and

and controlling the output unit to output the sound signal corresponding to the sound source data.

2. The electronic musical instrument according to claim 1, wherein the trigger comprises a contact trigger and/or a non-contact trigger, wherein the contact trigger comprises a trigger caused by performing a stroke and/or a press on one and/or more of the plurality of magnetic induction zones.

3. The electronic musical instrument of claim 2, wherein the sound source data comprises sound source data for each of a plurality of musical instruments, the control unit further configured to:

configuring the magnetic induction zone according to at least one desired instrument so that upon activation of the magnetic induction zone, a sound signal associated with the desired instrument is output.

4. The electronic musical instrument of claim 1, wherein each magnetic induction zone of the plurality of magnetic induction zones comprises a respective first magnetic induction circuit to produce the associated first magnetic induction signal when triggered.

5. The electronic musical instrument of claim 1, further comprising a trigger for triggering the magnetic induction zone so as to cause the triggered magnetic induction zone to generate the first magnetic induction signal.

6. The electronic musical instrument of claim 5, wherein the trigger comprises:

and the second magnetic induction circuit is used for generating a second magnetic induction signal so that when the trigger piece triggers the magnetic induction area, the magnetic induction area is triggered to generate the first magnetic induction signal.

7. The electronic musical instrument according to claim 1, wherein the control unit includes:

a conversion unit configured to convert the first magnetic induction signal into an electrical signal; and

a processing unit configured to:

acquiring sound source data associated with a magnetic induction area from the sound source memory according to the electric signal; and

and controlling the output unit to output the sound signal corresponding to the sound source data.

8. The electronic musical instrument according to claim 1, wherein the plurality of magnetic induction regions are made of a flexible circuit board, wherein the flexible circuit board is a one-piece circuit board or is formed by splicing a plurality of sub-circuit boards.

9. The electronic musical instrument according to claim 1, further comprising a wired transmission interface and/or a wireless transmission interface so as to provide extended functions with external devices.

10. The electronic musical instrument according to any one of claims 1 to 9, further comprising a control panel and/or a power module, wherein the control panel is connected to the control unit and is configured to perform function setting on the electronic musical instrument, and the power module is configured to supply power to the electronic musical instrument.

Technical Field

The present invention relates generally to the field of musical instruments. More particularly, the present invention relates to an electronic musical instrument.

Background

Conventional musical instruments typically produce sound using vibratory materials, some of which are selected from precious woods, thus resulting in higher overall cost of the instrument. Meanwhile, the conventional musical instrument is generally provided with a resonance box body so as to amplify sound, so that the conventional musical instrument is large in size and inconvenient to carry. In addition, the traditional musical instrument is not environment-friendly in the production and processing processes, has a complex manufacturing process and is limited by the supply of natural materials.

Further, in the existing electronic musical instruments (for example, musical instruments such as a piano), the conduction of the circuit switch is controlled by the knocking of the keys to generate an electric signal related to the piano sound, or the knocking is sensed by a common sensor to generate an electric signal, so as to generate a sound signal. Electronic musical instruments based on such operating principles are generally low in sensitivity and therefore affect the performance of players.

In addition, according to the playing requirements, different types of electronic musical instruments are usually required to be played, for example, xylophone, tremolo, marimban, electronic organ, electronic drum, and gong are selected to be played according to different playing scenes. If the instruments are carried at the same time, the whole instrument is bulky and inconvenient to carry. In addition, the existing electronic musical instruments have single functions and few external interfaces, and cannot be conveniently upgraded into different types of electronic musical instruments according to playing requirements, so that the requirements of players on multiple functions of the electronic musical instruments cannot be met.

Disclosure of Invention

To address at least one or more of the problems in the background art described above, the present invention provides an electronic musical instrument. The electronic musical instrument receives a trigger from the outside by using an electromagnetic induction technology, converts a magnetic flux change caused by the trigger into an electric signal, and outputs a corresponding sound signal according to the electric signal. In addition, the electronic musical instrument of the present invention conveniently realizes various types of electronic musical instruments by flexibly setting different trigger zones.

Specifically, the invention discloses an electronic musical instrument. The instrument comprises a plurality of magnetic induction zones, wherein each magnetic induction zone is configured to generate a first magnetic induction signal associated therewith when triggered; an audio source memory configured to store audio source data corresponding to each of the magnetic induction zones; an output unit configured to output a sound signal corresponding to the sound source data; and a control unit configured to: determining an associated magnetic induction zone according to the first magnetic induction signal; acquiring sound source data corresponding to the associated magnetic induction area from the sound source memory; and controlling the output unit to output a sound signal corresponding to the sound source data.

In one embodiment, the triggering comprises a contact triggering and/or a non-contact triggering, wherein the contact triggering comprises triggering caused by performing a blow and/or a press on one and/or more of the plurality of magnetic induction zones.

In another embodiment, the sound source data includes sound source data for each of a plurality of instruments, the control unit is further configured to: configuring the magnetic induction zone according to at least one desired instrument so that upon activation of the magnetic induction zone, a sound signal associated with the desired instrument is output.

In yet another embodiment, each magnetic induction region of the plurality of magnetic induction regions comprises a respective first magnetic induction circuit to produce the associated first magnetic induction signal when triggered.

In one embodiment, the electronic musical instrument of the present invention further includes a triggering component for triggering the magnetic induction region, so that the triggered magnetic induction region generates the first magnetic induction signal.

In another embodiment, the trigger comprises: and the second magnetic induction circuit is used for generating a second magnetic induction signal so that when the trigger piece triggers the magnetic induction area, the magnetic induction area is triggered to generate the first magnetic induction signal.

In yet another embodiment, the control unit includes: a conversion unit configured to convert the first magnetic induction signal into an electrical signal; and a processing unit configured to: acquiring sound source data associated with a magnetic induction area from the sound source memory according to the electric signal; and controlling the output unit to output the sound signal corresponding to the sound source data.

In one embodiment, the plurality of magnetic induction areas are made of a flexible circuit board, wherein the flexible circuit board is a whole circuit board or is formed by splicing a plurality of sub-circuit boards.

In another embodiment, the electronic musical instrument of the present invention further includes a wired transmission interface and/or a wireless transmission interface to provide extended functions with an external device.

In a further embodiment, the electronic musical instrument of the present invention further comprises a control panel and/or a power module, wherein the control panel is connected to the control unit and is configured to perform function setting on the electronic musical instrument, and the power module is configured to supply power to the electronic musical instrument.

The electronic musical instrument of the present invention can arrange the trigger area on the flexible circuit board in the form of a connector, and by curling the flexible circuit board, the volume of the electronic musical instrument is reduced, thereby facilitating transportation and carrying. In addition, the electronic musical instrument can be made of metal materials or composite materials with low price, so that the problems that the traditional musical instrument is limited in material selection and high in price are solved. Meanwhile, the electronic musical instrument can also adopt wireless modules such as Bluetooth and the like to communicate with external equipment, and is also provided with a multifunctional panel, so that the volume of the electronic musical instrument is further reduced, and the electronic musical instrument is convenient for players to play. In addition, the electronic musical instrument also has the advantages of good timbre, good playing hand feeling, strong anti-interference capability, multiple external interfaces and the like, thereby meeting various using requirements of different players on the musical instrument.

Drawings

The above-described features of the present invention will be better understood and its numerous objects, features, and advantages will be apparent to those skilled in the art by reading the following detailed description with reference to the accompanying drawings. The drawings in the following description are only some embodiments of the invention and other drawings may be derived by those skilled in the art without inventive effort, wherein:

fig. 1 is a block diagram schematically showing the composition of an electronic musical instrument according to an embodiment of the present invention;

fig. 2 is a schematic view showing the structure of a panel of an electronic musical instrument according to an embodiment of the present invention;

fig. 3 is a schematic view showing the structure of another panel of the electronic musical instrument according to the embodiment of the present invention;

fig. 4 is a schematic view showing the configuration of an electronic musical instrument according to an embodiment of the present invention;

fig. 5 is a schematic block diagram showing the composition of an electronic musical instrument according to an embodiment of the present invention; and

fig. 6 is a schematic diagram showing an internal configuration of the audio source memory according to the embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Fig. 1 is a block diagram schematically showing the composition of an electronic musical instrument 100 according to an embodiment of the present invention.

As shown in fig. 1, the electronic musical instrument 100 of the present invention may include a plurality of magnetic induction areas 110, an audio source memory 120, an output unit 130, and a control unit 140. Further, each magnetic induction zone is configured to generate a first magnetic induction signal associated therewith when triggered. The sound source memory is configured to store sound source data corresponding to each of the magnetic induction zones. The output unit is configured to output an audio signal corresponding to the audio source data. The control unit is configured to determine an associated magnetic induction region according to the first magnetic induction signal, so as to acquire the sound source data corresponding to the associated magnetic induction region from the sound source memory, thereby controlling the output unit to output the sound signal corresponding to the sound source data.

In one embodiment, the above-mentioned triggering of the plurality of magnetic induction areas of the electronic musical instrument of the present invention may include contact triggering and/or non-contact triggering, wherein the contact triggering may include triggering caused by performing a stroke and/or a press on one and/or more of the plurality of magnetic induction areas. In particular, the plurality of magnetic induction zones can be configured as touch trigger zones for a plurality of different instruments, depending on the application scenario. For example, the magnetic induction area can be set as a key pressing area of an electronic organ, and the magnetic induction area can also be set as a knocking area of one or more electronic instruments of a xylophone, a tremolo organ, a marimba, an electronic drum and a gong, so that the magnetic induction areas of various different electronic instruments can be triggered in a contact mode.

In addition, according to different types of instruments or different playing scenes, the triggering of the magnetic induction area can be set to be non-contact triggering. For example, an electromagnetic signal may be emitted by the trigger member to interact with a first magnetic induction signal of the magnetic induction zone, and when the trigger member is proximate to the magnetic induction zone (without contacting), the magnetic induction zone may be triggered to cause a change in magnetic flux of the magnetic induction zone. The sound source data may include sound source data for each of the plurality of musical instruments, corresponding to the above-described setting of the plurality of magnetic induction regions so as to realize the plurality of electronic musical instruments. In this case, the control unit is further configured to: configuring the magnetic induction zone according to at least one desired instrument so that upon activation of the magnetic induction zone, a sound signal associated with the desired instrument is output.

Fig. 2 is a schematic view showing the structure of a panel 200 of an electronic musical instrument according to an embodiment of the present invention.

As shown in fig. 2, the electronic musical instrument of the present invention may be provided as an electronic drum, which may include a plurality of magnetic induction zones 201, depending on the application scenario. Further, according to the playing requirements, the magnetic induction areas can be set as striking areas such as a bass drum, a snare drum, a low-pass drum and a small cymbal shown in fig. 2, so that when a drumstick strikes the magnetic induction areas, corresponding sounds such as the bass drum, the snare drum, the low-pass drum and the small cymbal are emitted, and the playing function of the electronic drum is realized.

Fig. 3 is a schematic view showing the structure of another panel 300 of the electronic musical instrument according to the embodiment of the present invention. It will be appreciated that the layout of the panel shown in figure 3 is merely illustrative and in actual practice it may be provided as a different number of keys or keystrokes depending on the instrument being implemented and with corresponding indicia marked thereon.

As shown in fig. 3, the electronic musical instrument of the present invention can become an electronic organ or one or more percussion organs such as xylophone, tremolo, marimba, etc. by arranging keys according to different application scenarios. The panel of the electronic organ or percussion organ may comprise a plurality of keys 301, wherein each key may correspond to one magnetic induction area, and the magnetic induction areas may be arranged in close contact below the key.

Further, the plurality of keys may be made of a composite material and may be arranged in two rows, in which the first row may be provided as a chromatic region, as shown in the upper row of note numbers # C, # D, # F, # G, and # a … of fig. 3, according to the playing requirements; and the second row may be provided as a diatonic region as shown in the lower row of note numbers C, D, E, F, G, A and B … in fig. 3. In the playing process, corresponding piano sound is emitted when the keys are manually pressed or struck by a hammer, so that the playing function of one of an electronic piano, a xylophone, a tremolo piano and a marimba piano is realized.

Further, the keys may be made of a flexible circuit board or a plurality of magnetic induction regions may be disposed on the flexible circuit board 302, wherein the flexible circuit board may be a one-piece circuit board or may be formed by splicing a plurality of sub-circuit boards. Preferably, the flexible circuit board may be, for example, a flexible circuit board or a thin film circuit board, which has advantages of high wiring density, light weight, high reliability, and good bending performance. In particular, when the flexible circuit board is formed by splicing a plurality of sub-circuit boards, the flexible circuit board may include one or more keyboard module interfaces 303 to realize splicing with other sub-circuit boards or connection with the body.

In some application scenarios, the multiple keyboard modules may be spliced with other sub circuit boards or connected with the body in a mechanical connection manner, for example, a clamping or plugging manner. Based on the design, when the electronic musical instrument needs to be carried, the bendable circuit board can be pulled out of the instrument body and folded to be curled, so that the volume is reduced, and the electronic musical instrument is convenient to transport and carry.

Fig. 4 is a schematic diagram showing the structure of an electronic musical instrument 400 according to an embodiment of the present invention.

As shown in fig. 4, in one embodiment, the electronic musical instrument of the present invention may include a key 401, a magnetic induction area 402, a trigger 403, a body 404, a main board 405, a control unit 406, an audio source memory 407, and an output unit 408. Specifically, the number and layout of the keys may be configured according to the type of the electronic musical instrument, and they may be made of a thermoplastic polyurethane elastomer rubber sheet (TPU), a wood board, or the like, wherein the keys made of the TPU board have the characteristics of high strength, good toughness, wear resistance, aging resistance, and the like.

Further, the grid shaded areas in fig. 4 are magnetic induction areas, which may be arranged at the lower part of the key, and each magnetic induction area comprises a respective first magnetic induction circuit, so as to generate the associated said first magnetic induction signal when the magnetic induction area is triggered. In one embodiment, the first magnetic induction circuitry may comprise circuitry consisting of a first magnetic induction coil (magnetic induction coils are represented in grid form in fig. 4). When the first magnetic induction coil is electrified, an excitation alternating electromagnetic field is generated in the magnetic induction area based on the electromagnetic induction principle. Further, when the magnetic induction area is triggered, the magnetic flux of the alternating magnetic field changes, the control unit can calculate the position of the magnetic induction area through the change of the magnetic flux, and then the sound source data in the sound source memory is called, so that the output unit outputs the sound signal corresponding to the sound source data.

In one embodiment, the triggering member may include a second magnetic induction circuit, which is configured to generate a second magnetic induction signal, so that when the triggering member triggers the magnetic induction area, the triggered magnetic induction area generates the aforementioned first magnetic induction signal. Further, the trigger may include an electric circuit composed of a second magnetic induction coil, which may be disposed at the round head of the hammer (i.e., trigger 403) shown in fig. 4. When the second magnetic induction coil is energized, an alternating electromagnetic field is generated around the second magnetic induction coil based on the principle of electromagnetic induction. When playing the musical instrument, the player uses the hammer to strike the key, and then makes the electromagnetic field that second magnetic induction coil produced trigger the magnetic induction district under the corresponding key to make the magnetic flux of the alternating magnetic field of this magnetic induction district produce the change. Furthermore, the control unit can calculate the position of the magnetic induction area through the change of the magnetic flux, and then can call the sound source data in the sound source memory, so that the output unit outputs the sound signal corresponding to the sound source data.

In another embodiment, the triggering member may be made of a metal material, and when the triggering member is close to the magnetic induction region by hitting the key, the magnetic induction region may be triggered, so that the triggered magnetic induction region generates a changed first magnetic induction signal. Specifically, a current of a specific frequency is loaded in the first magnetic induction coil, so that the magnetic induction area provides an excitation alternating electromagnetic field and can induce the feedback of the trigger piece. When the trigger piece is close to the magnetic induction area, the trigger piece obtains energy from the excitation electromagnetic field and superposes a pressure-sensitive signal to the magnetic field change, so that the magnetic induction area is triggered and the magnetic flux of the magnetic induction area is changed. Furthermore, the control unit can calculate the position of the magnetic induction area through the change of the magnetic flux, and then can call the sound source data in the sound source memory, so that the output unit outputs the sound signal corresponding to the sound source data.

In one embodiment, the electronic musical instrument of the present invention may further include a body. The body may be a cavity structure, which may be made of metal or composite material, and the surface thereof may be arranged with a plurality of keys so as to constitute various kinds of electronic musical instruments. Further, the body may include a cavity in which a main board and an output unit may be accommodated. In one application scenario, the cavity may also house a power module and other accessory circuit boards or modules. In addition, a control panel and various external transmission interfaces can be arranged on the outer surface of the body, so that a player can conveniently control and play.

Further, a control unit and/or a sound source memory configured to store sound source data associated with the keys, and other electronic components may be disposed on the main board. The control unit may comprise a conversion unit and a processing unit, wherein the conversion unit is configured to convert the first magnetic induction signal from the magnetic induction area into an electrical signal; and the processing unit is configured to acquire the sound source data associated with the magnetic induction area from the sound source memory according to the electric signal so as to control the output unit to output the sound signal corresponding to the sound source data. During the performance, first, the control unit receives a variation signal from the magnetic fluxes generated by the plurality of magnetic induction areas. Then, the signal is converted into an electric signal and sound source data associated with the electric signal is acquired from a sound source memory according to the electric signal. Finally, the control output unit outputs the musical instrument sound signal corresponding to the sound source data.

In one embodiment, the audio source memory may be configured to store audio source data associated with the plurality of magnetic induction zones. In one application scenario, the sound source data may comprise, for example, data relating to timbre and/or sound effect of at least one electronic musical instrument. According to aspects of the present invention, the at least one electronic musical instrument may include, but is not limited to, one or more of a plurality of musical instruments such as a xylophone, a tremolo, a marimba, an electronic organ, an electronic drum, and a gong. Further, the electronic musical instrument of the present invention can exhibit the same performance effect as that of the existing plural kinds of electronic musical instruments according to the different settings of the sound source data and the number of the magnetic induction regions.

In one embodiment, the output unit may be configured to output a musical tone signal corresponding to the sound source data. In one application scenario, the output unit may be a speaker including a power amplifier, so that the sound signal is amplified and played in the form of sound.

Fig. 5 is a block diagram showing the constituent principle of an electronic musical instrument 500 according to an embodiment of the present invention. It is understood that the electronic musical instrument 500 shown in fig. 5 is an exemplary embodiment of the electronic musical instrument 100 shown in fig. 1, which includes more implementation details. Therefore, the above description of the electronic musical instrument 100 is also applicable to the scheme of the electronic musical instrument 500, and the same contents are not repeated.

As shown in fig. 5, the electronic musical instrument 500 of the present invention may include a magnetic induction area 501, an a/D conversion module 502, a filter module 503, a main control unit 504, an IC sound source memory 505, a data memory 506, a power amplifier 507, a speaker 508, a bluetooth module 509, an optical fiber module 510, and a MIDI interface 511.

In one embodiment, the a/D conversion module may include an a/D conversion chip and its attached circuits, which are configured to convert the analog electrical signals output by the magnetic induction regions into digital electrical signals and input the digital electrical signals to the control unit. Specifically, the a/D conversion functions to convert an analog signal continuous in time and amplitude into a digital signal discrete in time and amplitude. Typically, a/D conversion requires 4 processes of sampling, holding, quantizing, and encoding. In practical circuits, some of the foregoing processes may be combined, for example, quantization and coding are often implemented simultaneously in the conversion process.

In one embodiment, the filtering module may include a filter and its accompanying circuitry configured to filter the digital electrical signal and send the filtered digital electrical signal to the master control unit. During playing of the electronic musical instrument, due to the electrical characteristics of the electronic components, low-frequency or high-frequency interference signals may be generated in the circuit, which may affect the reception of useful signals associated with the striking of the key. Therefore, the digital electric signal output by the a/D conversion module can be processed by a filter composed of a resistor and a capacitor, for example, so as to filter out interference signals therein, and ensure normal reception of useful signals.

In one embodiment, the memory of the present invention may include an IC source memory and a data memory. Wherein the IC sound source memory is configured to store sound source data associated with a plurality of magnetic induction zones, the sound source data including, but not limited to, data relating to timbre and/or sound effect of one or more of a xylophone, a tremolo, a marimbap, an electronic organ, an electronic drum, and a gong. The internal structure of the IC sound source memory will be briefly described with reference to fig. 6.

Fig. 6 is a schematic diagram showing an internal structure of an IC sound source memory 600 according to an embodiment of the present invention. As shown in fig. 6, the IC sound source memory stores waveform data of sound source data [0] to sound source data [ n ], where the sound source data [0] is waveform data of the lowest note and the sound source data [ n ] is waveform data of the highest note, where the magnitude of the value of n depends on the number of keys. When sound source data is stored in the same number of wavelengths, since the wavelength of bass is longer, the data of sound source data corresponding to a lower note number is longer than the data of sound source data corresponding to a higher note number, and therefore the storage space occupied by the data of sound source data in the IC sound source memory is larger. In one embodiment, the sound source data corresponds to the keys shown in fig. 4 one to one, for example, the sound source data [0] may correspond to the note number C of the key shown in fig. 4, the sound source data [1] may correspond to the note number D of the key shown in fig. 4, for example, and the like.

In one embodiment, the data store may be configured to store programs and data related to controlling the operation of electronic instrument related modules and units, and may also be used to store other music data related to performance. The data storage device and the main control unit can be connected through a bus, and the data storage device and the main control unit can comprise a plurality of groups of sound source memories, and each group of sound source memories and the main control unit can be connected through the bus.

In one embodiment, the master control unit of the present invention may comprise a micro control unit ("MCU") and a processing unit, wherein the MCU is configured to receive and process the signals transmitted from the plurality of magnetic induction zones so as to convert the magnetic flux variation signals into electrical signals, thereby distinguishing and locating the magnetic induction zones. The processing unit may be implemented, for example, using a digital signal processor ("DSP"). The DSP is a microprocessor suitable for performing digital signal processing operations, and is mainly applied to rapidly implement various digital signal processing algorithms in real time. For the present invention, the DSP is used as a processing unit, and the audio signal can be processed rapidly in real time. Specifically, firstly, the DSP receives the digital electrical signal output from the magnetic induction area and processed by a/D conversion, filtering and MCU. Then, the DSP acquires sound source data associated with the digital electric signal from an IC sound source memory. Finally, the DSP sends the sound source data to the output unit so as to output a sound signal corresponding to the sound source data.

In one embodiment, the power amplifier may be composed of three parts: the power amplifier comprises a preamplifier circuit, a drive amplifier circuit and a final-stage power amplifier circuit. The pre-amplifier circuit is configured for impedance matching, which has advantages of high input impedance and low output impedance, and thus can receive and transmit the current signal of the audio source data with a minimum data loss. The drive amplifying circuit is configured to further amplify the current signal sent by the pre-amplifying circuit into a signal with medium power so as to drive the final-stage power amplifying circuit to normally work. The final power amplifying circuit plays a key role in the power amplifier, the technical index of the final power amplifying circuit determines the technical index of the whole power amplifier, and the final power amplifying circuit is configured to amplify a current signal sent by the driving amplifying circuit into a high-power signal so as to drive a loudspeaker to play sound.

In one embodiment, the speaker may include a magnet, a frame, a centering disk, a cone diaphragm, and the like. Alternatively, the speaker may further include the power amplifier described above. A loudspeaker, commonly known as a "horn", is a transducer device that converts an electrical signal into an acoustic signal. Specifically, the audio power signal causes the cone or diaphragm of the speaker to vibrate and resonate (resonate) with the surrounding air to generate sound through electromagnetic, piezoelectric, or electrostatic effects. Alternatively, the speaker may be disposed outside the electronic musical instrument of the present invention, which may be wirelessly connected with the electronic musical instrument of the present invention by a wireless communication technique such as bluetooth.

In one embodiment, the electronic musical instrument of the present invention may further include a transmission interface. Configured to enable the electronic musical instrument to interact with an external device to provide extended functionality of the electronic musical instrument, wherein the transmission interface comprises a wired transmission interface and/or a wireless transmission interface to provide wired and/or wireless connectivity with the external device. As a specific implementation, the wired transmission Interface may be, for example, one or more of a music device Digital Interface ("MIDI"), a General-purpose input/output ("GPIO") Interface, a high-speed Serial computer extended bus ("PCIE") Interface, a Serial Peripheral Interface ("SPI"), and an optical fiber Interface, as required.

Further, the wired transmission interface may be electrically connected to the main control unit, so as to realize data transmission between the musical instrument and an external device (e.g., a server, a computer, or other musical instrument). In one embodiment, the wired transmission interface may be, for example, a standard PCIE interface. The data to be processed is transmitted to the computer by the main control unit through the standard PCIE interface, so that the audio signals output by the electronic musical instrument are controlled and edited by the computer.

In another embodiment, the wired transmission interface may also be a MIDI interface. MIDI is a standard for digital music, which defines various notes or playing codes for playing devices such as electronic musical instruments and allows electronic musical instruments, computers or other playing devices to be connected, adjusted and synchronized with each other so as to exchange playing data among the musical instruments in real time. In one embodiment, the MIDI interface is configured for data communication between the electronic musical instrument of the present invention and a musical instrument having the MIDI interface, thereby enabling a joint performance between a plurality of musical instruments.

In yet another embodiment, the wired transmission interface may also be an optical fiber interface including an optical module configured for data transmission between the musical instrument of the present invention and an external device. Specifically, the light module may include a light emitting module and a light receiving module. In one application scenario, in one aspect, an electrical signal of data transmitted from the main control unit of the musical instrument of the present invention is processed by a driving chip inside the light emitting module, so as to drive a semiconductor Laser (LD) or a Light Emitting Diode (LED) to emit a modulated optical signal at a corresponding rate, and the optical signal is coupled into an optical fiber for transmission to an external device through the optical fiber. On the other hand, the optical signal of the data sent by the external device is processed by the optical detection diode and the amplifier in the optical receiving module, so as to output the electrical signal with the corresponding code rate, and the electrical signal is transmitted to the main control unit. The musical instrument and the external equipment of the invention transmit data through optical signals, which not only can effectively overcome the defect of large attenuation of electric signal transmission, but also has faster data transmission speed and stronger anti-interference capability, thereby improving the performance of the electronic musical instrument of the invention.

In another embodiment, the wireless transmission interface may be one or more of a bluetooth interface, an infrared interface, a WIFI interface, and the like, for example, as required. The wireless transmission interface is connected with the main control unit in a wireless mode, and therefore data transmission between the electronic musical instrument and external equipment (such as a server, a computer or other musical instruments) is achieved. In one embodiment, the wireless transmission interface may be, for example, a bluetooth interface including a bluetooth module, and the bluetooth interface may be used to connect the electronic musical instrument and the external speaker of the present invention, wherein the bluetooth module may be disposed in both the electronic musical instrument and the speaker of the present invention, so that the external speaker may be conveniently and flexibly located according to the requirement of playing on site.

In one embodiment, the electronic musical instrument of the present invention may further include a control panel connected to the main control unit through a line bit interface and configured to perform function setting on the electronic musical instrument. In one embodiment, the control panel may include, for example, a display screen, a switch key for different musical instruments, a volume key, and other functional modules. The display screen is configured to display a performance status of the current electronic musical instrument. The switching keys of different musical instruments can be used for selecting the playing modes of different musical instruments such as xylophone, marimba, tremolo, electronic organ, electronic drum or gong and the like. The volume keys are connected to a power amplifier so as to be configured to control the magnitude of sound output by the musical instrument.

In one embodiment, the electronic musical instrument of the present invention may further include a power supply module, which may be implemented in various ways to supply power to the electronic musical instrument. For example, but not limited to, the electronic musical instrument of the present invention can be powered by externally connecting the commercial power and arranging the transformation unit inside the power module; the electronic musical instrument can also be powered by arranging a power adapter. In addition, the electronic musical instrument of the present invention may be powered by a battery pack provided on the body and a dry battery.

The working principle of the electronic musical instrument of the present invention will be described in detail below with reference to fig. 1 to 6 by taking a marimban as an example.

When a player needs to use the electronic musical instrument of the present invention as a marimba, first, the flexible circuit board can be opened and laid flat on a table top. And then, assembling the plurality of bendable circuit boards and the piano body so as to form the 61-key marimba. After the hardware connection is completed, the player needs to set the electronic musical instrument of the present invention as a marimba by means of the keys on the control panel.

The performance starts, and the player strikes a key with a hammer, for example, a key represented by note number C. The second magnetic induction signal generated on the hammer triggers the magnetic induction area below the key, so that the intensity of the first magnetic induction signal generated by the magnetic induction area is changed. Further, a change in the signal strength of the magnetic induction zone results in a change in the current in the first magnetic induction coil, which is received by the control unit and processed to distinguish and locate the magnetic induction zone.

Then, the a/D conversion module receives the analog electrical signal sent by the magnetic induction region, and converts the analog electrical signal into a digital electrical signal after a series of processing such as sampling, quantization and encoding. Then, the digital electric signal is processed by a filtering module so as to effectively filter out high-frequency and low-frequency interference signals therein. Thereafter, the control unit performs table lookup in the IC sound source memory to acquire sound source data [0] associated with the key of sound source number C, and outputs the sound source data [0] to the power amplifier.

Then, the power amplifier processes the received sound source data [0] signal through a pre-amplifying circuit, a driving amplifying circuit and a final power amplifying circuit respectively and sequentially, and finally amplifies the sound source data [0] signal. The amplified sound source data [0] signal can be transmitted to a loudspeaker in a wired or wireless mode for playing, and finally, a listener can listen to the sound emitted by the key of the sound source number C. Particularly, if a player needs to connect the electronic musical instrument of the present invention to a computer or other electronic musical instruments so as to perform music learning or joint playing through APP software, the player can connect with the above-mentioned devices through a bluetooth module or a MIDI interface.

It should be understood that the terms "first", "second", "third" and "fourth", etc. in the claims, the description and the drawings of the present invention are used for distinguishing different objects and are not used for describing a particular order. The terms "comprises" and "comprising," when used in the specification and claims of this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and claims of this application, the singular form of "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and claims of this specification refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

As used in this specification and claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

Although the embodiments of the present invention are described above, the descriptions are only examples for facilitating understanding of the present invention, and are not intended to limit the scope and application scenarios of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.