CN103903603A - Converter plate used for intelligent piano - Google Patents
Converter plate used for intelligent piano Download PDFInfo
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- CN103903603A CN103903603A CN201210578935.9A CN201210578935A CN103903603A CN 103903603 A CN103903603 A CN 103903603A CN 201210578935 A CN201210578935 A CN 201210578935A CN 103903603 A CN103903603 A CN 103903603A
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Abstract
The invention discloses a converter plate used for an intelligent piano. The converter plate includes a power-supply circuit, a USB interface circuit, an MIDI interface circuit, a damper-pedal detection circuit and a keyboard scanning circuit. The power-supply circuit includes fuse protectors L1-L2, diodes D1-D3, a capacitor C1, a resistor R1, a power-supply switch SW1, a voltage-stabilizing tube V1 and a socket POW and the like. The USB interface circuit includes components such as a chip USB and fuse protectors L3-L6 and the like. The MIDI interface circuit includes components such as a connection terminal MIDI and fuse protectors L7-L11 and the like. The damper-pedal detection circuit includes components such as a pedal connection terminal CN3 and fuse protectors L12-L13 and the like. The keyboard scanning circuit includes components such as a keyboard connection terminal CN1 and a keyboard connection terminal CN2 and the like. The converter plate used for the intelligent piano has the advantages that the converter plate is capable of acquiring actions of a pedal and a keyboard of the piano and converting the actions into electrical signals and transmitting the electrical signals to a microprocessor so that the intelligence level of the piano is improved and the like.
Description
Technical field
The present invention relates to a kind of change-over panel for intelligent piano.
Background technology
Along with the develop rapidly of electronic technology, the combination of piano conventional art and modern electronic technology, pianotron just arises at the historic moment.Digital piano than traditional mechanical piano many many " number " distinctive function.Digital piano not only has the repertoire of mechanical piano by digital technology, also there is unique multiple tone color, storage memory, modified tone, audio mixing, beat function, and have midi interface, earphone, microphone interface etc., realize the combination of piano conventional art and modern high technology.Now, more and more children learns piano, but traditional piano study method is uninteresting, and does not possess error correction, even if play wrong, player is also difficult for finding.By special piano training seminar study piano, the training organization that not only will arrange the time specially, and also learning time is short, expense is higher, and learner can not learn at any time.
Application number is that 200420017550.6 Chinese utility model patent discloses a kind of steel ball with scanner uni display device, is provided with scanner and display device on body, and display device is by foot-operated gauge tap control page turning.This piano has been avoided needing in the process of playing moving with handspring the problem that music score is made troubles to player, but only only possesses the effect that shows and stir music score, cannot detect the action of piano key and pedal, can not gather playing information.
Application number is that 200420016436.1 Chinese utility model patent discloses a kind of pianocoder, on the body of piano, bookshelf is set, display is set on bookshelf, body has host computer, keyboard and mouse are set on body, can show qin spectrum by computer, also can learn piano course by online computing.This pianocoder, is only that computer is arranged on piano, not interactive between computer and piano, also cannot detect the action of piano key and pedal, cannot the playing information of piano be gathered and be analyzed.
Summary of the invention
The present invention is the weak point existing in above-mentioned prior art for avoiding, and a kind of change-over panel for intelligent piano is provided, so that gather the key of piano and the action message of pedal.
The present invention be technical solution problem by the following technical solutions.
For the change-over panel of intelligent piano, its design feature is to comprise power circuit, usb circuit, midi interface circuit, Sustain testing circuit and keyboard scanning circuit;
Described power circuit comprises fuse L1～L2, diode D1～D3, capacitor C 1, capacitor C 2, capacitor C 6, electric capacity E1, electric capacity E2, resistance R 1, power switch SW1, stabilivolt V1 and socket POW;
Described usb circuit comprises chip USB, fuse L3～L6, capacitor C 3, capacitor C 7, resistance R 29, resistance R 33, resistance R 34 and resistance R 36;
Described midi interface circuit comprises splicing ear MIDI, fuse L7～L11, capacitor C 8, resistance R 39, resistance R 41 and resistance R 44;
Described Sustain testing circuit comprises pedal splicing ear CN3, fuse L12～L13, capacitor C 4 and resistance R 47; Wherein, one end of described capacitor C 4 is connected between fuse L12 and resistance R 47, and tie point is RA5;
Described keyboard scanning circuit comprises keyboard splicing ear CN1, keyboard splicing ear CN2, resistance R 2～R28, resistance R 30～R32, resistance R 35, resistance R 37～R38, resistance R 40, resistance R 42～R43, resistance R 45～R46.
Change-over panel for intelligent piano of the present invention also has following technical characterstic.
Described stabilivolt V1 is triode UR133-AB3-B.
The described change-over panel for intelligent piano is also provided with keyboard signal input port, pedal signal input port, midi signal output interface, USB-MIDI signal output and power supply input port; Described keyboard signal input port and described keyboard splicing ear CN1, keyboard splicing ear CN2 are electrically connected; Described pedal signal input port and described pedal splicing ear CN3 are electrically connected; Described midi signal output interface and described splicing ear MIDI are electrically connected; USB-MIDI signal output and described chip USB are electrically connected; Described power supply input port and socket POW are electrically connected.
Compared with the prior art, beneficial effect of the present invention is embodied in:
Change-over panel for intelligent piano of the present invention, can pass through Sustain testing circuit and keyboard scanning circuit collection, analysis user playing information, and by USB interface, the information detecting is passed to microprocessor and process, whether the information that can judge performance by microprocessor is consistent with music score, and in the time that makeing mistakes, performance points out on display screen, simultaneously by loudspeaker or the prompting of earphone output sound, make learner when performance makes mistakes, obtain the warning that makes mistakes, possesses good error correction, improve the effect of learning by oneself, there is the intelligent level of height.The demonstration of music score is consistent with performance progress, stirs without manually controlling music score, and player need not consider to operate the operational issue that music score stirs.
Change-over panel for intelligent piano of the present invention, can Real-time Collection soft pedal and the action of keyboard, and action is converted into electrical signal transfer to microprocessor, thereby improve the intelligent level of piano, make user can learn more intuitively and grasp the knowledge such as music theory, piano performance, there is the intelligent level of height.
Accompanying drawing explanation
The connector schematic diagram of Fig. 1, the change-over panel for intelligent piano of the present invention.
The power circuit diagram of Fig. 2, the change-over panel for intelligent piano of the present invention.
The usb circuit figure of Fig. 3, the change-over panel for intelligent piano of the present invention.
The midi interface circuit diagram of Fig. 4, the change-over panel for intelligent piano of the present invention.
The Sustain testing circuit figure of Fig. 5, the change-over panel for intelligent piano of the present invention.
The keyboard scanning circuit figure of Fig. 6, the change-over panel for intelligent piano of the present invention.
Fig. 7, be provided with the hardware principle block scheme of the control circuit of the intelligent piano of change-over panel of the present invention.
Fig. 8, be provided with the outside drawing of an embodiment (body arranges groove) of the intelligent piano of change-over panel of the present invention.
Fig. 9, be provided with the outside drawing of an embodiment (qin lid is set on body) of the intelligent piano of change-over panel of the present invention.
Figure 10, be provided with the external cabling schematic diagram of the interface of the intelligent piano of change-over panel of the present invention.
Figure 11, be provided with the connector schematic diagram of the ARM platform that the intelligent piano of change-over panel of the present invention adopts.
Figure 12, be provided with the connector schematic diagram of the microprocessor of the master control board of the intelligent piano of change-over panel of the present invention.
Figure 13, be provided with the intelligent piano of change-over panel of the present invention master control board LED show and key circuit figure.
Number in the figure: 1 body, 2 qin lids, 3 display screens, 4 keyboards, 5 power interfaces, 66.5mm earphone jack, 7MIDI OUT interface, 8 Sustain interfaces, 9 switches, 10 volume adjusting holes, 113.5mm earphone jack.
Below pass through embodiment, and the invention will be further described by reference to the accompanying drawings.
Embodiment
Referring to Fig. 1, for the change-over panel of intelligent piano, comprise power circuit, usb circuit, midi interface circuit, Sustain testing circuit and keyboard scanning circuit;
Described power circuit comprises fuse L1～L2, diode D1～D3, capacitor C 1, capacitor C 2, capacitor C 6, electric capacity E1, electric capacity E2, resistance R 1, power switch SW1, stabilivolt V1 and socket POW;
Described usb circuit comprises chip USB, fuse L3～L6, capacitor C 3, capacitor C 7, resistance R 29, resistance R 33, resistance R 34 and resistance R 36;
Described midi interface circuit comprises splicing ear MIDI, fuse L7～L11, capacitor C 8, resistance R 39, resistance R 41 and resistance R 44;
Described Sustain testing circuit comprises pedal splicing ear CN3, fuse L12～L13, capacitor C 4 and resistance R 47; Wherein, one end of described capacitor C 4 is connected between fuse L12 and resistance R 47, and tie point is RA5;
Described keyboard scanning circuit comprises keyboard splicing ear CN1, keyboard splicing ear CN2, resistance R 2～R28, resistance R 30～R32, resistance R 35, resistance R 37～R38, resistance R 40, resistance R 42～R43, resistance R 45～R46.
Fig. 1 is the connector schematic diagram of change-over panel.Change-over panel is provided with keyboard signal input port, pedal signal input port (external pedal I/O interface), midi signal output (being described midi interface, is external MIDI-OUT I/O interface), USB-MIDI signal output (USB line picks out) and power supply input.
The circuit of this change-over panel comprise usb circuit, for provide power supply power circuit, output midi signal midi interface circuit, for detection of the Sustain testing circuit of the action of Sustain, for detection of the keyboard scanning circuit of keyboard action.Fig. 2 is power circuit, and external power source access, after power circuit filtering, step-down etc. are processed, is master control board and all parts power supply.POW-5V is external power interface.Fig. 3 is usb circuit, makes master control board that this circuit and external unit swap data can be provided.Fig. 4 is midi interface circuit, for master control board can be exported midi signal.Fig. 5 and Fig. 6 are respectively Sustain testing circuit and MIDI keyboard scanning circuit, and the main composition part that these two circuit are change-over panels for detection of the action of pedal and keyboard, and passes to microprocessor by the actuating signal detecting.
POW socket in power circuit connects 5V direct supply, and SW1 is power switch.5V direct supply, USB power supply, midi interface power supply by diode D1, D2, D3 input, are reduced to 3.3V to system power supply through stabilivolt UR133-AB3-B respectively.Usb circuit: UD+, UD-connect single-chip microcomputer, realize USB2.0 data transmission.In midi interface circuit, single-chip microcomputer TX2 human hair combing waste send serial communication data, realizes the transmission of MIDI device data.
In Sustain testing circuit, single-chip microcomputer detects low and high level by RA5 tie point, and in the time that pedal closes, RA5 is low level.In keyboard scanning circuit, the RD of single-chip microcomputer, RB, RC, RE, mouth is used for keyboard scan, and the keyboard scan ability of 22x8 is provided.Keyboard is with scan mode work, detailed process: first by RD, RB, the RC mouth section of sending gating, one section of each gating, correspondent section route selection is set to low level, reads RE mouth, and the key being depressed is because connecting with section route selection, corresponding port is input as low level, so just complete the state read-in process of a paragraph key dish (8 keys), done 22 circulations, arranged afterwards strong state and read in regard to having completed 88 front-seat keys and 88.Detect respectively the action of soft pedal and keyboard by Sustain testing circuit and keyboard scanning circuit, and action is converted into electric signal transmission, action message can be passed to microprocessor by USB interface, thereby make piano can realize intellectuality.
Adopt the pianotron of change-over panel of the present invention also to comprise body 1, keyboard 4, pedal, display screen 3 and master control board; Described master control board comprises and is used to the power interface 5 of master control board power supply and for controlling the part such as power switch, microprocessor, power amplifier chips, two loudspeakers and two earphone jacks of on/off.In described master control board, also include demonstration and key circuit for the control information of output display information and reception external control key-press input.Described display screen is arranged on described body; Described keyboard, pedal are all electrically connected with described change-over panel, and described change-over panel is connected with described display screen by microprocessor; On described change-over panel, be connected with midi interface; Described keyboard, pedal are all connected with described power interface; On the sound output of described microprocessor, be connected with volume adjusting switch, described volume adjusting switch is connected with two earphone jacks with two loudspeakers respectively.On described body, be provided with groove, display screen is arranged on described body in hinged mode, within the time that display screen closes, display screen is embedded in described groove.Turning display screen when use, playing information or the error message that can observe at any time demonstration.The used time is not embedded in display screen in groove.Or, on described body 1, being also provided with qin lid 2, described qin lid 2 is arranged on described body 1 in hinged mode, on described qin lid 2, is provided with described display screen 3 near in the one side of keyboard.Described qin lid is articulated with on described body, and after upset, the one side of the close keyboard of qin lid is just relative with player, makes player can watch easily display screen.Described display screen is liquid crystal touch screen; Described microprocessor is arm processor.Between described microprocessor and cloud server, communicate by letter by the mode of radio communication or wire communication.Described two earphone jacks are respectively 3.5mm earphone jack 11 and 6.5mm earphone jack 6.Two earphone jacks are connected with two loudspeakers respectively, and in the time of earphone jack grafting earphone, corresponding loudspeaker stops output sound.Between described change-over panel and described microprocessor, be connected by USB interface.
Described stabilivolt V1 is triode UR133-AB3-B.
The described change-over panel for intelligent piano is also provided with keyboard signal input port, pedal signal input port, midi signal output interface, USB-MIDI signal output and power supply input port; Described keyboard signal input port and described keyboard splicing ear CN1, keyboard splicing ear CN2 are electrically connected; Described pedal signal input port and described pedal splicing ear CN3 are electrically connected; Described midi signal output interface and described splicing ear MIDI are electrically connected; USB-MIDI signal output and described chip USB are electrically connected; Described power supply input port and socket POW are electrically connected.
Use the intelligent piano of change-over panel of the present invention, played by emulation fingerboard, by MIDI change-over panel, electric signal has been converted to midi signal, by MIDI change-over panel, midi signal has been delivered to respectively to external interface as output midi signal; An other road midi signal access is positioned at the microcontroller in master control board, sends midi signal to microcontroller.External tenuto pedal is connected to midi signal by outside in addition, is connected on MIDI change-over panel.By midi interface, change-over panel can be communicated with other external smart machines, export playing information to external other intelligent equipments.The equipment such as microprocessor and power amplifier chips and external memory storage is all arranged in master control board, within described master control board is installed on the body of piano.
Use in the master control board of intelligent piano of change-over panel of the present invention and stored bank (thering is the tone color of Musical World), the firmware FIRMWARE of independent research.About various exercise mode and the software of piano study) there is multiple USB output, audio frequency output, video is exported, cable interface.In master control board, have from the signal of outside touch-screen access, and outputting video signal is to exterior display screen.Audio frequency in master control board is exported to two audio amplifiers (being divided into left and right sound channels) of qin body, also export two-way one tunnel and export 3.5mm earphone jack 11 (with earphone enlarging function to the earphone on product keyboard 4 the right, jack diameter is 3.5mm), qin body rear portion 6.5mm earphone jack (6 jack diameters are 6.5mm) external output signal is exported on a road.On body, be provided with interface 8, switch 9 and the volume adjusting hole 10 of MIDI OUT interface 7 (for the output of midi signal), Sustain.
Independent research software section can be played in real time by keyboard, transfers built-in piano sound, can reach minimum 20 milliseconds/note; Can import standard MIDI music-book on pianoforte, can automatic Playing, in exercise mode, on the music score in screen, top-stitching is followed to play and is carried out sometimes, and timeline is set beat flicker with melody, does not down continue as played wrong time line.Screen below shows 88 key boards, on the keyboard of the position that need to play certain key below screen, has blue some prompting, if play wrongly, can show red on the keyboard of screen below.
If Fig. 7 is the circuit hardware connection diagram on piano.Described power amplifier chips, microprocessor and change-over panel can be integrated on a circuit board, also can be placed in respectively on multiple circuit boards.Midi interface, volume adjusting switch, loudspeaker and earphone jack philosophy are distributed on body, are electrically connected respectively by wire with master control board.Change-over panel is connected with pedal with key by the mode of electrical connection, for detection of the action of key and pedal, is pressed to judge which key whether pedal be operated with.
Fig. 8 and Fig. 9 are the pianos of two kinds of different profiles, and its display screen is arranged at different positions.While thering is no cover plate, display screen is located to body upper surface, body arranges groove with storage display screen.While having cover plate, display screen is located to the inside surface of cover plate, is put cover plate lid lower time, display screen is also packed up.
Figure 10 is the vertical view of the body of piano, has marked the position of each IO interface and volume adjusting switch on figure.
Figure 11 is the ARM platform structure figure while adopting ARM as microcontroller.The built-in bank of arm processor, and be provided with AUDIO interface, USB interface, HDMI interface and LAN interface.
Figure 12 is the circuit diagram of microprocessor, and microprocessor is selected microchip band usb microcontroller PIC18F65J50, has 32KB FLASH ROM and 3094B SRAM.Single-chip microcomputer is by controlling Sustain testing circuit and keyboard scanning circuit, arranges key, the state of each keyboard of discriminatory analysis, the dynamics that calculating keyboard is pressed after scan 88 front-seat keys and 88.Send data to USB device by USB interface, send MIDI protocol data to MIDI equipment by TX2, realized pianotron 88 buttons and convert to the function of USB and MIDI data.
Figure 13 is that LED shows and key circuit, comprises resistance R 48～51, resistance R 54, LED 1～LED3, capacitor C 10, electric capacity 17, keyswitch SW2～SW3, arrives display screen, and can detect the operation information of external key for output display information.Operating personnel can be by external key input control order to master control board.When concrete enforcement, button can be arranged on body.Tri-various states of diode displaying of LED1, LED2 and LED3.SW2 and SW3 button selectively operating pattern and function setting.
Use the intelligent piano of change-over panel of the present invention, can realize the fabulous compatibility to various sample formats, this is also the scalability feature extending out based on ESMMP platform, be convenient to the upgrading of product, improve the intelligent level of piano, make user can learn more intuitively and grasp the knowledge such as music theory, piano performance, there is the intelligent level of height, solved piano introduction difficult, the music theory knowledge problem such as can visually learn, can correct a mistake in time in exercise.
Use the intelligent piano of change-over panel of the present invention, screen can further and user's distance by interactive screen significantly, screen itself can show music score, and on fingerboard corresponding position, the microcontroller of built-in two-forty running in screen qin body, computing is rapidly carried out in any instruction that microcontroller sends user, the note that player is played and instant the processing of various signal, and send accurately corresponding sound, be apparent in the various information that occur corresponding note on screen simultaneously.By network interface, can will adopt state-of-the-art high in the clouds technology to provide the to one's name melody storehouse of style to user, arm processor is connected with cloud server is wired or wireless.In the situation that having network, can be anywhere or anytime recover own Qu Ku from our high in the clouds and download the melody of oneself needs, so just there will not be the embarrassment that cannot play owing to leaving behind music score.
Used the intelligent piano of change-over panel of the present invention preset two kinds of patterns, be divided into exercise mode and performance pattern.After we enter exercise mode, user plays according to the note on music score, plays correct note and can down carry out, and has our built-in metronome standard rhythm simultaneously, if performance is incorrect, music score does not down carry out.Enter in performance pattern, can be when user have played, through the computing of core, for accuracy in pitch, rhythm, what the aspects such as mood were instant provides a mark, if any inaccurate place, on screen, point out out more inaccurate place simultaneously, and can carry out at any time the demonstration performance of melody, allow user have impression more accurately to unfamiliar melody, be convenient to user according to the requirement study of oneself.
Used the intelligent piano of change-over panel of the present invention, adopted based on FGA25N120 symmetrical half bridge formula power converter and adopt arm processor as numerical control core, microprocessor can in store special teaching software.Can show music score and trigger default cartoon teaching software by tangible screen, carry out advanced formula study for the aspect such as music theory, piano performance.Learner, without learning by oneself to training organization, can decide time point and the time length of study in its sole discretion, has solved the problem that is subject to place and time restriction while study in training organization, has reduced the cost of study.Simultaneously by advanced technology, in conjunction with vivid animation element, the piano knowledge such as the contraposition of the note on knowledge point, staff to music on 88 piano keies, analyze and reasonably arrange, make user can learn more intuitively and grasp the knowledge such as music theory, piano performance, solved piano introduction difficult, the music theory knowledge problem such as can visually learn, can correct a mistake in time in exercise.
Claims (3)
1. for a change-over panel for intelligent piano, it is characterized in that, comprise power circuit, usb circuit, midi interface circuit, Sustain testing circuit and keyboard scanning circuit;
Described power circuit comprises fuse L1～L2, diode D1～D3, capacitor C 1, capacitor C 2, capacitor C 6, electric capacity E1, electric capacity E2, resistance R 1, power switch SW1, stabilivolt V1 and socket POW;
Described usb circuit comprises chip USB, fuse L3～L6, capacitor C 3, capacitor C 7, resistance R 29, resistance R 33, resistance R 34 and resistance R 36;
Described midi interface circuit comprises splicing ear MIDI, fuse L7～L11, capacitor C 8, resistance R 39, resistance R 41 and resistance R 44;
Described Sustain testing circuit comprises pedal splicing ear CN3, fuse L12～L13, capacitor C 4 and resistance R 47; Wherein, one end of described capacitor C 4 is connected between fuse L12 and resistance R 47, and tie point is RA5;
Described keyboard scanning circuit comprises keyboard splicing ear CN1, keyboard splicing ear CN2, resistance R 2～R28, resistance R 30～R32, resistance R 35, resistance R 37～R38, resistance R 40, resistance R 42～R43, resistance R 45～R46.
2. the change-over panel for intelligent piano according to claim 1, is characterized in that, described stabilivolt V1 is triode UR133-AB3-B.
3. the change-over panel for intelligent piano according to claim 1, is characterized in that, is also provided with keyboard signal input port, pedal signal input port, midi signal output interface, USB-MIDI signal output and power supply input port; Described keyboard signal input port and described keyboard splicing ear CN1, keyboard splicing ear CN2 are electrically connected; Described pedal signal input port and described pedal splicing ear CN3 are electrically connected; Described midi signal output interface and described splicing ear MIDI are electrically connected; USB-MIDI signal output and described chip USB are electrically connected; Described power supply input port and socket POW are electrically connected.
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| CN201210578935.9A CN103903603A (en) | 2012-12-28 | 2012-12-28 | Converter plate used for intelligent piano |
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| CN201210578935.9A CN103903603A (en) | 2012-12-28 | 2012-12-28 | Converter plate used for intelligent piano |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105702241A (en) * | 2016-03-10 | 2016-06-22 | 武汉致嘉乐器有限公司 | Four-foot-operated digital piano and accent strengthening method |
| CN105702120A (en) * | 2015-04-08 | 2016-06-22 | 易弹信息科技（上海）有限公司 | Piano sound collecting and broadcasting device and key calibration method |
| CN109272973A (en) * | 2018-11-13 | 2019-01-25 | 广州维纳斯家居股份有限公司 | A kind of control method, device, terminal and the storage medium of touch type electronic piano |
| US10600399B2 (en) | 2016-01-15 | 2020-03-24 | Sunland Information Technology Co., Ltd. | Smart piano system |
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| CN2646826Y (en) * | 2003-07-11 | 2004-10-06 | 曹晓忠 | Digital computer piano |
| CN201984381U (en) * | 2011-01-14 | 2011-09-21 | 熊世林 | Computer piano |
| CN203102846U (en) * | 2012-12-28 | 2013-07-31 | 侯旻 | Conversion plate for intelligent piano |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2646826Y (en) * | 2003-07-11 | 2004-10-06 | 曹晓忠 | Digital computer piano |
| CN201984381U (en) * | 2011-01-14 | 2011-09-21 | 熊世林 | Computer piano |
| CN203102846U (en) * | 2012-12-28 | 2013-07-31 | 侯旻 | Conversion plate for intelligent piano |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702120A (en) * | 2015-04-08 | 2016-06-22 | 易弹信息科技（上海）有限公司 | Piano sound collecting and broadcasting device and key calibration method |
| US10600399B2 (en) | 2016-01-15 | 2020-03-24 | Sunland Information Technology Co., Ltd. | Smart piano system |
| US10636402B2 (en) | 2016-01-15 | 2020-04-28 | Sunland Information Technology Co., Ltd. | Systems and methods for automatic calibration of musical devices |
| US10657943B2 (en) | 2016-01-15 | 2020-05-19 | Sunland Information Technology Co., Ltd. | Systems and methods for calibrating a musical device |
| US10950137B2 (en) | 2016-01-15 | 2021-03-16 | Sunland Information Technology Co., Ltd. | Smart piano system |
| US11328618B2 (en) | 2016-01-15 | 2022-05-10 | Sunland Information Technology Co., Ltd. | Systems and methods for calibrating a musical device |
| CN105702241A (en) * | 2016-03-10 | 2016-06-22 | 武汉致嘉乐器有限公司 | Four-foot-operated digital piano and accent strengthening method |
| CN109272973A (en) * | 2018-11-13 | 2019-01-25 | 广州维纳斯家居股份有限公司 | A kind of control method, device, terminal and the storage medium of touch type electronic piano |
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Application publication date: 20140702 |
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