CN2646826Y - Digital computer piano - Google Patents
Digital computer piano Download PDFInfo
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- CN2646826Y CN2646826Y CN 03275607 CN03275607U CN2646826Y CN 2646826 Y CN2646826 Y CN 2646826Y CN 03275607 CN03275607 CN 03275607 CN 03275607 U CN03275607 U CN 03275607U CN 2646826 Y CN2646826 Y CN 2646826Y
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Abstract
The utility model discloses a digital piano including a piano keyboard and further comprising a piano keyboard circuit to collect the keyboard status information and a control panel. The control panel comprises a keyboard interface circuit to receive the keyboard status information, a keyboard controller to control the operation of the digital piano and an external interface circuit to send the keyboard status information and the control information to the multimedia computer. Wherein, the keyboard circuit is connected with the keyboard interface circuit, which together with the external interface circuit is connected with the keyboard control circuit. The utility model also further includes a pedal part and function buttons and a corresponding interface circuit. The utility model has the advantages of low cost and use convenience, facilitating popularization and promotion.
Description
Technical field
The utility model relates to computer peripheral equipment, is specifically related to a kind of Digital computer piano that uses and have the piano playing function that is connected with computing machine.
Background technology
Piano is known as " king of musical instrument ", and tone color that it is abundant and perfect expressive force make all philharmonic people topple over.Present philharmonic people is more and more, and the traditional mechanical piano is because it costs an arm and a leg, safeguards inconvenience and difficulty of learning, and make numerous music-lovers hang back, thereby make the traditional mechanical piano be difficult to come on a large scale common people house, can not really form universally socially, this can't but be one sorry greatly.
Along with the development of computer technology, people have expected utilizing computer technology to simulate traditional musical instrument.For example present MIDI (Musical Instrument Digital Interface) (MIDI) keyboard that occurs, it is connected with computer by midi interface, can piano key that is virtually reality like reality.MIDI is the unified agreement that exchanges between a kind of electronic musical instrument and between electronic musical instrument and the computer, and itself does not comprise any acoustic information for playback.Computer music is synthetic by different synthetic methods.For example, under all sound recordings that in computing machine, all real instruments can be sent, be stored as a wave table file.When playing computer music, send instruction according to the musical composition information of MIDI file logging to wave table, from the wave table file, find out corresponding acoustic information one by one, play back by computer sound card and audio amplifier through synthetic and processing back then.
Though present MIDI keyboard can utilize computer to realize the broadcast of music, but this MIDI keyboard is because its use object mainly is that Music Insider is used, and its function that comprises is very various and complicated, and is corresponding therewith, its price is also very expensive, is difficult to spread to common music-lover.And this MIDI keyboard only comprises a keyboard, and seldom is that traditional piano has 88 keys like that, and does not comprise parts such as soft pedal, so it can not simulate the performance of piano effectively.In addition, this MIDI keyboard need be connected with host computer by wired mode, has limited moving of MIDI keyboard.This shows that the MIDI keyboard also is not suitable for the exercise of piano, particularly be not suitable for begining to learn people's exercise of piano.
The utility model content
In view of this, fundamental purpose of the present utility model provides a kind of cheap and be more suitable for the Digital computer piano that the beginner carries out piano study.
Digital computer piano of the present invention comprises: keys and keyboard 11 and be used to gather the keys and keyboard circuit of key status information, and control panel 2, the external interface circuit 23 that control panel 2 comprises the keyboard controller 21 that the key interface circuit 22 that is used to receive the key status information, the operation that is used for the logarithmic code pianocoder are controlled and is used for key status information and control information are sent to multimedia computer, wherein the keys and keyboard circuit is connected with key interface circuit 22, and keys and keyboard interface circuit 22 and external interface circuit 23 are connected to keyboard controller 21.
In above-mentioned Digital computer piano, each key has two non-conterminous contacts, the keys and keyboard circuit by 8 row 22 row totally 176 circuit contact matrixes constitute, key interface circuit 22 is by the P1 port and PA, the PB of an I/O extended chip that is connected with this cpu chip, the determinant sweep circuit that pc port is formed of the cpu chip that constitutes keyboard controller 21.
In above-mentioned Digital computer piano, may further include pedal part 12, control panel 2 further comprises the foot-pedal interface circuit 25 that is connected to pedal part 12 and gathers the pedal status information.Pedal part 12 can comprise the off beat pedal, continue pedal and tenuto pedal, foot-pedal interface circuit 25 by P20, P21, the P22 port of the cpu chip that constitutes keyboard controller 21 connect a pull-up resistor and and foot-pedal interface and ground wire between the on-off circuit that constitutes form.
In above-mentioned Digital computer piano, may further include a function button 13 that is used for auxiliary multimedia computer operation, control panel 2 further comprises the function button interface circuit 24 that is connected to function button 13 and acquisition function button 13 status informations.Function button interface circuit 24 by the P23 port of the cpu chip that constitutes keyboard controller 21 connect a pull-up resistor and and function button switch and ground wire between the on-off circuit that constitutes form.
In above-mentioned Digital computer piano, the external interface circuit 23 of control panel 2 can comprise USB (universal serial bus) (USB) interface and a midi interface, and perhaps the interface of external interface circuit 23 is wireless transmitter interfaces.
In above-mentioned Digital computer piano, may further include pedal part 12, and the pedal fixture 19 that further comprises the cover plate 14 that is positioned on the keys and keyboard 11, is positioned at qin shell 15 around the keys and keyboard, is used to support the side plate 16,17 of keys and keyboard and backboard 18 and is used for feet pedal part 12.
Perhaps, above-mentioned Digital computer piano may further include the cover plate 14 that is positioned on the keys and keyboard 11, be positioned at the qin shell 15 around the keys and keyboard and be positioned at the interface section 40 of qin case back, and interface section 40 further comprises the interface 20 of external interface circuit 23 and is used for the foot-pedal interface 41 of connecting pin pedal part 12.
From technical scheme of the present invention as can be seen, by design keys and keyboard circuit and control panel, the key information that the user can be played sends to multimedia computer after treatment, synthetic and play out the melody that the user plays by multimedia computer by audio amplifier by sound card, thus realized synthetic and reproduce piano playing information by computer.The utility model only need with the basis of the similar keys and keyboard of traditional piano on increase several cpu chips and several connecting circuit, implementation is simple, with low cost, therefore compare with traditional mechanical piano and expensive MIDI keyboard, be more prone to popularize and promote according to Digital computer piano of the present utility model, can satisfy common music-lover's demand easilier, thereby can be that vast music-lover, particularly piano beginner open up a kind of new learning music and the approach of use music.
The utility model is provided with two circuit contacts below each key, can determine the dynamics that key is pressed by the mistiming of two circuit contact closures like this, thereby can show user's the situation of playing better, the music of playing by computer is also more true to nature and have expressive force more.
External circuit interface of the present utility model can be set to midi interface or USB interface, being connected of convenience and multimedia computer, and, the external circuit interface can also use wireless transmitter, position between Digital computer piano and multimedia computer relation can be more flexible like this, thereby made things convenient for user's spatial placement.
In addition, the utility model can be in conjunction with the piano study software of multimedia computer, powerful piano study, guiding function is provided for the piano beginner, compare by the information of playing formation music score and former spectrum the user, perhaps record, operation such as playback, can promote the interest of user learning, and improve the efficient of user learning.
Description of drawings
Figure 1A is the positive perspective view of a kind of specific embodiment of the present utility model;
Figure 1B is the back side perspective view of a kind of specific embodiment of the present utility model;
Fig. 2 A is the positive perspective view of another kind of specific embodiment of the present utility model;
Fig. 2 B is the back side perspective view of another kind of specific embodiment of the present utility model;
Fig. 3 is an inner structure block diagram of the present utility model;
Fig. 4 is the circuit diagram of piano key part of the present utility model;
Fig. 5 is the circuit diagram of control section of the present utility model and interface section.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Fig. 1 shows the spatial structure of a kind of specific embodiment of the present utility model.Wherein Figure 1A shows its Facad structure, and Figure 1B shows its structure.As can be seen from Figure 1, this is the Digital computer piano of a standard configuration, and and the profile of traditional mechanical piano closely similar.Different is, except the keys and keyboard 11 that on traditional piano, can see, cover plate 14, qin shell 15, left plate 16, right plate 17, backboard 18, pedal fixture 19, pedal 12 (comprises the off beat pedal, continue pedal and tenuto pedal) outside, further has the keys and keyboard circuit that describes in detail in the back below the keys and keyboard 11 of the present utility model, and a control panel 2 has been installed further, control panel 2 is mainly used in the operation of logarithmic code pianocoder and controls, the circuit that it will be introduced in detail by the back connects each functional parts of Digital computer piano, and for example keys and keyboard 11, pedal 12 etc.A function button 13 has been installed on the left side of keys and keyboard 11 in addition, and function button 13 will be elaborated in the back.The interface 20 that is used to be connected to multimedia computer that a control panel 2 is arranged at the back side of piano can be connected to the connecting line 51 that interface 20, the other end is connected to multimedia computer the corresponding interface by an end Digital computer piano and multimedia computer are coupled together.
Fig. 2 has gone out the spatial structure of the another kind of specific embodiment of the utility model.Wherein Fig. 2 shows its front view, and Fig. 2 shows its rear view.Compare the embodiment of Fig. 1, this embodiment has showed a kind of small-sized Digital computer piano, this mainly is because the standard digital pianocoder of Fig. 1 need occupy bigger space, and some user may wish that Digital computer piano is littler dimensionally and function does not weaken, and has therefore proposed this small-sized Digital computer piano among this embodiment of the present utility model.Compare with Fig. 1, this small-sized Digital computer piano does not have parts such as side plate, backboard and pedal fixture, and just comprises a keys and keyboard 11, control panel 2, qin shell 15, a cover plate 14 and a function button 13.Owing to can not connecting line be set at the backboard of Digital computer piano, therefore in this embodiment, directly be provided with an interface section 40 at the back side of qin shell 15, it comprises two interfaces, an interface 20 is used to insert the connecting line 51 that is connected to multimedia computer, and 41 another interfaces are used to connect a pedal 12.Here the reason that only connects a pedal is when reality is used, most of users only use a pedal in three pedals, be the tenuto pedal, just can reach the effect that the user plays required expression substantially, and can more save the space like this and be more suitable for beginner's study.Certainly can understand, also can in interface section 40, further comprise the interface that is used to connect other pedal here.
Introduced basic structure of the present utility model by Fig. 1 and Fig. 2 above, then principle of work of the present utility model has been described below in conjunction with Fig. 3 to Fig. 6.
Fig. 3 shows inner structure block diagram of the present utility model, can be clear that from Fig. 3, the functional parts of Digital computer piano of the present invention mainly comprises keys and keyboard 11, pedal 12, function button 13 and control panel 2, wherein control panel 2 further comprises a keyboard controller 21, a key interface circuit 22 that is used to connect keys and keyboard 11 and keyboard controller 21, a pedal interface circuit 25 that is used for connecting pin pedal 12 and keyboard controller 21, a function button interface circuit 24 that is used for linkage function button 13 and keyboard controller 21, and external interface circuit 23 that is used for keyboard controller 21 is connected to multimedia computer the corresponding interface.
In the utility model, keys and keyboard 11 is used to play melody, and its key size, quantity and dynamics size are all extremely similar with the key of traditional mechanical piano.In the present embodiment, the key quantity of keys and keyboard 11 is 88 keys of standard.Information notice multimedia computer for key is pressed is provided with a keys and keyboard circuit below keys and keyboard 11.Simultaneously, for the dynamics that pushes button when playing melody has more accurate analysis and simulation, each key is provided with two circuit contacts in the present embodiment, and the keys and keyboard circuit just is made of totally 176 circuit matrix contacts 8 row, 22 row like this, and its circuit as shown in Figure 4.When some keys were pressed, first contact was closed earlier, if continue to press key, and second closing of contact then.Difference between two time of closing contacts then can reflect the dynamics that pushes button when the user plays melody, by the record of this keystroke dynamics size, just can show thought and the skill and technique that the user plays truer and exactly.
Fig. 5 shows the circuit diagram of control section and interface section.As shown in Figure 5, it by the P1 mouth of keyboard controller cpu chip (label is U1 in the drawings) and model the sweep circuit that PA, PB, the PC of 8155 I/O extended chip (label is U2 in the drawings) forms the keys and keyboard determinant, just the key interface circuit 22, wherein the P10 to P17 of keyboard controller cpu chip forms 8 horizontal scanning line parts, and PA0 to PA7, the PB0 to PB7 of I/O extended chip and PC0 to PC5 form 22 column scan line parts.When keyboard controller 2 scanning keys and keyboards 11, the logic state of putting 22 column scan lines earlier is 1, the output logic 0 of order in 8 horizontal scanning lines again, to other horizontal scanning line output logics 1, read the state of 22 column scan lines then, if the logic state of a certain horizontal scanning line (for example I bar) be 0 o'clock a certain column scan line (for example J bar) logic state also be 0, determine that then (I J) is pressed in the matrix contact.If this contact is first contact under the key, keyboard controller 21 picks up counting, if this contact is second contact, 21 of keyboard controllers calculate the mistimings of this closing of contact and first closing of contact, and to look into the dynamics translation table according to the mistiming be the dynamics value.The dynamics conversion table here is exactly the mapping table between a mistiming and the dynamics value in fact, and for example the mistiming is that 0.5 stopwatch shows that the dynamics value is 60, and the mistiming is that 0.8 stopwatch shows that the dynamics value is 40 or the like.The situation multimedia computers different for the dynamics value will send different volumes, thereby reproduce the situation of user when playing more accurately, show user's thought better and play skill and technique.Keyboard controller 21 will represent the key closing of contact closed sign indicating number, this key key assignments and be sent to multimedia computer by the dynamics value that is converted to.If scan this key released after, 21 of keyboard controllers send the key assignments that unclamp sign indicating number and this key that unclamp expression key contact to multimedia computer.
Equally as shown in Figure 5, have at pedal under three the situation, P20, P21 by keyboard controller 21 are connected a pull-up resistor respectively with the P22 mouth, and constitute on-off circuit respectively and between three foot-pedal interface and the ground wire, thereby have formed foot-pedal interface circuit 25.Like this, can judge which pedal by the current potential that detects P20, P21 and P22 mouth is operated.Specifically, when three pedals all were not operated, owing to P20, P21 link to each other with power supply by pull-up resistor with the P22 mouth, so these three ports were high level.After wherein any one pedal was operated, coupled P2 mouth just was connected with ground wire by the pedal switch, was low level thereby make this port.Therefore, by detecting the level value of these three ports, just can judge the pedal that links to each other with them and whether be operated.
Can also see that in Fig. 5 the P23 mouth of keyboard controller 21 connects a pull-up resistor, and and be connected between the function button switch of function button and the ground wire and constitute an on-off circuit, thereby the function button interface circuit formed.Whether like this, can judge function button by the current potential that detects the P23 mouth is pressed.Specifically, when function button was not pressed, owing to the P23 mouth links to each other with power supply by pull-up resistor, so the P23 mouth was a high level.When function button is pressed, the function button switch closure, coupled P23 mouth just is connected with ground wire by this keyswitch, and then this port is just drawn and is low level.Therefore whether, it is closed just can to judge the function button switch by the level of P23 mouth, and just whether the user supresses function button.
Two kinds of possible external interfaces are provided in the present embodiment, and a kind of is the midi interface that is exclusively used in the music peripheral hardware, and another kind is USB (universal serial bus) (USB) interface that present computer peripheral equipment generally uses.When reality is used Digital computer piano, select one of them interface just passable.As shown in Figure 5, the P33 of keyboard controller 21 (TXD) port has constituted the interface circuit of a midi standard with transmission resistance R 10, and has constituted the interface circuit of USB standard jointly with the USB interface chip.The signal that sends by USB interface by the conversion of a conversion of signals software, promptly can be exchanged into the signal of midi standard in multimedia computer.And, the utility model is connected to the multimedia computer except using above-mentioned two kinds of wired connection modes, can also use and obtain at present the wave point form widely applied, a supporting wireless transmitter for example is installed respectively between Digital computer piano and multimedia computer, signal between them transmits and can be undertaken by the form of wireless signal like this, thereby make the position relation between Digital computer piano and the multimedia computer can be more flexible, further facilitated user's use.Under situation about connecting by wired mode, Digital computer piano does not need to connect separately power supply, only need obtain power supply from multimedia computer and get final product.And under situation about connecting by wireless mode, the data pianocoder then needs to be equipped with separately power supply, the power supply here can be a direct supply, also can be common 220V AC power, further comprises an ac/dc conversion equipment under the situation of AC power.
With the sound card that is used for processing audio signal and the audio amplifier that is used to play sound are installed on the matching used multimedia computer of Digital computer piano of the present utility model.In multimedia computer, also installed the formed piano sound of high frequency sampling storehouse has been carried out in the pronunciation of traditional mechanical piano, multimedia computer is according to the information of playing that sends from the Digital computer piano external interface circuit, in bank, access corresponding tone color, utilize the Audio Processing chip of sound card to synthesize, play out sound after synthetic by audio amplifier then, can send with the same sound of traditional mechanical piano.The further details that plays sound as for sound card processing audio signal and audio amplifier is the technology of knowing to those skilled in the art, repeats no more here.
Need to prove, the piano study software that is used to learn piano playing can be installed on multimedia computer, learning software can all information of playing of real time record, and the form with music score reflects, and on this basis, exercise is estimated and taught to user's piano playing, and can record, operation such as playback, tone color selection, thereby be very easy to piano beginner's piano study.The function button of mentioning in front is used with learning software in fact, and function button is equivalent to a quick collateral key in fact.For example, when function button is not pressed, press 88 keys and represent to play corresponding note, and after function button is pressed, press some keys and then no longer represent to play corresponding note, but the learning software of multimedia computer is carried out certain operation, and for example represent recording by some keys, represent to repeat playing or the like just now by another key.The purpose that function button is set also just is to be connected under the distant situation with multimedia computer at Digital computer piano, the user does not need between to move back and forth in the time of need operating learning software, and as long as get final product the operated from a distance learning software, thereby brought bigger convenience to the user at the functions of use button at intermittence of playing melody.
The front was mentioned, the Control Software that a whole operation that is used for the logarithmic code pianocoder is controlled is installed on keyboard controller 21, this Control Software is mainly used in carries out to system whether initialization, keyboard scan, identification keystroke dynamics, identification pedal are operated, whether the recognition function button is pressed and the signal that collects is sent to the multimedia computer piano, and it comprises that table look-up subroutine and coding of initialization subroutine, keyboard scan subroutine, dynamics sends subroutine etc.
Under the control of Control Software, when Digital computer piano with after multimedia computer is connected by wired mode, perhaps connect a power supply separately after, 21 pairs of all circuit of keyboard controller carry out initialization.At first determine by function button interface circuit 24 whether function button 13 is pressed then.If function button 13 is not pressed, then expression is to play melody now, scan by 22 pairs of keys and keyboards of key interface circuit then, scanning after some keys are pressed, what further determine current closure is first contact or second contact this key under, if then the mistiming of basis and first closing of contact obtains the dynamics value second contact.Keyboard controller 21 further determines by foot-pedal interface circuit 25 whether pedal 12 is operated, and obtains corresponding pedal signal.Keyboard controller sends to multimedia computer with the key assignments of the closed sign indicating number of key, key and dynamics value and pedal signal by external interface circuit 23 then.If scan this key when released, then send the key assignments that unclamps sign indicating number and this key.After multimedia computer receives these signals, by sound card signal is handled to obtain voice signal, by the audio amplifier signal that plays sound, the user can hear the piano performance note almost as broad as long with the sound of traditional mechanical piano then.
At first determining under the situation that function button 13 is pressed, keyboard controller 21 by key interface circuit 22 which key of scanning is pressed, then this information is sent to multimedia computer by external interface circuit 23, after the learning software of multimedia computer receives this information, carry out predetermined operation.
Above-mentionedly the utility model is illustrated by embodiment.It will be understood by those skilled in the art that above-mentioned just to the displaying of the utility model spirit, and not in order to limit protection domain of the present utility model.
Claims (10)
1. Digital computer piano, comprise keys and keyboard (11), it is characterized in that, further comprise the keys and keyboard circuit that is used to gather the key status information, an and control panel (2), described control panel (2) comprises the key interface circuit (22) that is used to receive described key status information, the external interface circuit (23) that is used for the keyboard controller (21) that the operation of logarithmic code pianocoder controls and is used for described key status information and control information are sent to multimedia computer, described keys and keyboard circuit is connected with key interface circuit (22), and described keys and keyboard interface circuit (22) and external interface circuit (23) are connected to described keyboard controller (21).
2. Digital computer piano according to claim 1 is characterized in that, described each key has two non-conterminous contacts.
3. Digital computer piano according to claim 2, it is characterized in that, described keys and keyboard circuit by 8 row 22 row totally 176 circuit contact matrixes constitute, described key interface circuit (22) is by the P1 port and PA, the PB of an I/O extended chip that is connected with described cpu chip, the determinant sweep circuit that pc port is formed of the cpu chip that constitutes keyboard controller (21).
4. Digital computer piano according to claim 1, it is characterized in that, described Digital computer piano further comprises pedal part (12), and described control panel (2) further comprises and is connected to pedal part (12) and gathers the foot-pedal interface circuit (25) of pedal status information.
5. Digital computer piano according to claim 4, it is characterized in that, described pedal part (12) comprises the off beat pedal, continues pedal and tenuto pedal, described foot-pedal interface circuit (25) by P20, P21, the P22 port of the cpu chip that constitutes keyboard controller (21) connect a pull-up resistor and and foot-pedal interface and ground wire between the on-off circuit that constitutes form.
6. Digital computer piano according to claim 1, it is characterized in that, described Digital computer piano further comprises a function button (13) that is used for auxiliary multimedia computer operation, and described control panel (2) further comprises the function button interface circuit (24) that is connected to described function button (13) and acquisition function button (13) status information.
7. Digital computer piano according to claim 6, it is characterized in that, described function button interface circuit (24) by the P23 port of the cpu chip that constitutes keyboard controller (21) connect a pull-up resistor and and function button switch and ground wire between the on-off circuit that constitutes form.
8. Digital computer piano according to claim 1, it is characterized in that, the external interface circuit (23) of described control panel (2) comprises USB (universal serial bus) (USB) interface and a MIDI (Musical Instrument Digital Interface) (MIDI), and perhaps the interface of external interface circuit (23) is a wireless transmitter interface.
9. Digital computer piano according to claim 1, it is characterized in that, described Digital computer piano further comprises pedal part (12), and further comprises the cover plate (14) that is positioned on the keys and keyboard (11), is positioned at qin shell (15), the side plate (16,17) that is used to support keys and keyboard and the backboard (18) around the keys and keyboard and is used for the partly pedal fixture (19) of (12) of feet pedal.
10. Digital computer piano according to claim 1, it is characterized in that, described Digital computer piano further comprises the cover plate (14) that is positioned on the keys and keyboard (11), be positioned at the qin shell (15) around the keys and keyboard and be positioned at the interface section (40) of qin case back, and described interface section (40) further comprise the interface (20) of external interface circuit (23) and are used for the partly foot-pedal interface (41) of (12) of connecting pin pedal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03275607 CN2646826Y (en) | 2003-07-11 | 2003-07-11 | Digital computer piano |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03275607 CN2646826Y (en) | 2003-07-11 | 2003-07-11 | Digital computer piano |
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| Publication Number | Publication Date |
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| CN2646826Y true CN2646826Y (en) | 2004-10-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03275607 Expired - Fee Related CN2646826Y (en) | 2003-07-11 | 2003-07-11 | Digital computer piano |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903603A (en) * | 2012-12-28 | 2014-07-02 | 熊世林 | Converter plate used for intelligent piano |
| CN104900222A (en) * | 2015-05-13 | 2015-09-09 | 朱剑超 | Playing system based on intelligent terminal |
| CN105096691A (en) * | 2015-07-27 | 2015-11-25 | 王涛 | Piano simulation learning equipment and usage method thereof |
| 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 |
| CN105719627A (en) * | 2016-03-28 | 2016-06-29 | 广州艾茉森电子有限公司 | Novel digital piano and working method thereof |
| US10600399B2 (en) | 2016-01-15 | 2020-03-24 | Sunland Information Technology Co., Ltd. | Smart piano system |
-
2003
- 2003-07-11 CN CN 03275607 patent/CN2646826Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903603A (en) * | 2012-12-28 | 2014-07-02 | 熊世林 | Converter plate used for intelligent piano |
| 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 |
| CN104900222A (en) * | 2015-05-13 | 2015-09-09 | 朱剑超 | Playing system based on intelligent terminal |
| CN105096691A (en) * | 2015-07-27 | 2015-11-25 | 王涛 | Piano simulation learning equipment and usage method thereof |
| 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 |
| CN105719627A (en) * | 2016-03-28 | 2016-06-29 | 广州艾茉森电子有限公司 | Novel digital piano and working method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |