Electronic music keyboard

Abstract

The electronic musical keyboard (100) comprises a number of keys (1), a number of magnetic sensors (4) equal to the number of keys, a magnet (5) disposed on each key (1), an A / D converter (6) connected to each of the magnetic sensors (4), a microcontroller (7) connected to the A / D converter (6) and configured to receive digital values ​​(V1, ... Vn) indicative of key positions and convert them into key position values ​​to select useful key position values ​​(P1, ... Pm) for generating sounds, and a digital multiplier (D) connected to the microcontroller (7) and configured to receive the useful key position values ​​(P1, ... Pm) and thereby generate at least one sound signal (S * , S1...Sk), and a digital signal processor (DSP) (8) connected to the DSP (8) and configured to generate at least one sound signal (S * , S1...Sk) and an electro-acoustic transducer (9) configured to receive the musical tones (S).

Description

[Technical Field]

[0001] This invention relates to the field of electronic musical instruments, and more particularly to electronic musical keyboards. [Background technology]

[0002] In any electronic musical instrument provided with a keyboard, it is necessary to determine when the action of pressing a key on the keyboard is considered effective in generating an acoustic signal capable of reproducing the intended tone. When determining the acceptable key strokes for all mechanical instruments, it is necessary to determine which position of the stroke is associated with tone generation.

[0003] For certain notes defined as "dynamic," specific parameters of the tone need to be adjusted according to the force applied to the key. The most well-known and direct example is that of a self-playing piano. By striking the strings with small or large force, the piano hammer determines entirely different tonal and acoustic characteristics. The first characteristic is, as is well known, the intensity of the sound. In addition to intensity, the tonal characteristics change considerably depending on the force applied.

[0004] Other mechanical (non-electronic) musical instruments, such as mechanical pipe organs, possess an interesting characteristic. This is not so much derived from the force applied to press the keys, but rather from the position reached by the keys. In fact, in such mechanical organs, a series of levers allow the keys to open valves, enabling air generated by bellows to enter the organ pipes and determine the sound.

[0005] If a key is held in a position that incompletely opens the valve, or in a position that opens the valve slowly and vaguely, unstable harmonics are produced, prolonging the "attack" phase, resulting in an unsteady sound by extending the phase in which the air column is not stabilized and the noise portion of the sound from the air blown into the pipe remains. While such behavior is undesirable, electronic instruments that can simulate this drawback (like many others that are usefully simulated) would be welcomed by organists, as it can contribute to the overall realism of the performance to some extent. Renowned organists can even utilize such characteristics to create more impressive performances.

[0006] Another example of a real musical instrument where a keyboard covered by such a patent would be advantageous is the electromechanical organ, exemplified by the well-known Hammond organ, in which a series of phonic wheels placed in front of each pickup produce many tones. The phonic wheels are connected to each key on the keyboard by controls called "drawbars." More precisely, the phonic wheels are connected to each key by nine drawbars, which individually adjust the intensity of each phonic wheel.

[0007] The inventor of the Hammond organ designed a complex mechanism consisting of nine switches to switch between nine phonic wheels connected to each key. Such a mechanism was intended to allow all nine phonic wheels to provide their signals simultaneously. However, this is not possible, and therefore the nine wheels are switched continuously at very short time intervals, determined by the construction. While it is not easy to distinguish the temporal continuity of the switching in the phonic wheels during normal use, this characteristic, like all shortcomings in real instruments, is unique to this instrument. Furthermore, the possibility of emulating such behavior adds realism to electronic simulations.

[0008] Currently, all electronic music keyboards are designed in the same way: one or more switches are placed beneath each key to detect when the key is pressed. These switches consist of conductive rubber hemispheres mounted on a printed circuit board (PCB). When they are pressed by a key, the hemispheres create contacts on the PCB. The key presses against the hemisphere, which deforms and contacts two conductive graphite pads positioned on the PCB, activating the contacts via the conductive rubber.

[0009] A single hemispherical object, or single switch, is used simply when necessary to establish the activation event of the tone. Such objects (single contacts) are now completely obsolete.

[0010] Two hemispherical objects are used when necessary to establish the force applied to the key. They are positioned at different distances from each other and activated at two different positions in the key stroke, i.e., at two different time moments, taking into account the player pressing the key from the resting position to the end of the stroke.

[0011] The greater the force applied to the key, the greater the speed at which the key moves. Therefore, it is possible to correlate the key's speed with the applied force. As a result, when the two contacts are closed, the time elapsed between the closing of the first contact and the closing of the second contact can be measured by detecting two time points. Since the space through which the key moved is known, the key's speed can be determined, and consequently, the applied force can be indirectly estimated.

[0012] Currently, such technology is being improved by employing three hemispherical objects, or three contact points. This improves the judgment of key speed, especially in so-called repetitive tones, where, due to the speed of playing, the key may be pressed again by the player before it returns to its resting position. In such cases, the presence of an intermediate contact point makes it possible to detect movements and events that may be lost in the case of only two contact points.

[0013] Currently, both electronic keyboards with two contacts and those with three contacts exist on the market. While it's necessary to measure the speed of key movement to determine the activation of the key presses, this keyboard doesn't need to recognize the position of the key at every moment of movement.

[0014] When an electronic keyboard attempts to emulate a pipe organ, it must be considered that it will need to recognize the position of the keys sequentially. In fact, in a mechanical pipe organ, a skilled organist can move the keys around the position that determines the opening of the pipe organ's valves, gradually opening and closing the valves to achieve better expression in musical performance.

[0015] Similarly, when attempting to emulate a Hammond organ with a phonic wheel, it is necessary to recognize the key position at each moment in order to continuously determine which of the nine contacts on the phonic wheel should be opened or closed. In such cases, too, a skilled organist playing an electromechanical Hammond organ can control the opening and closing of the nine contacts on the phonic wheel at will, based on the key position, to achieve quite interesting musical effects. Furthermore, in a real Hammond organ, the opening and closing of the contacts is highly variable from key to key, both in terms of the spatial position of the key and the continuity of the phonic wheel being activated.

[0016] Current electronic keyboards are unable to emulate the effects of traditional pipe organs or Hammond organs. This is because of the loss of positional information that must be detected with high spatial resolution.

[0017] Japanese Patent Publication No. 0439693 discloses an electronic keyboard with magnets on the keys and Hall sensors on a PCB mounted on the keyboard frame. The electronics of the keypad are configured to detect only two positions of the key, namely the resting position of the key and the stroke end position of the key. Clearly, a 2-bit A / D converter is sufficient to detect the two positions. The detection of these two positions is used only to measure the speed of the key. Such electronics are not provided to detect key positions other than the resting position and the stroke end position. These two states do not precisely correspond to the resting condition and the stroke end condition, because it is necessary to leave a margin of motion before the first contact and another margin of motion before the stroke end. This is confirmed by the fact that the magnets are mounted inside a nonlinear, deformable rubber capsule. This rubber capsule has an initial hysteresis, then jumps to a nearly fixed position, and is released from the sensor almost instantaneously when the key is released. Therefore, such keyboards are not suitable for emulating the sounds of a Hammond organ or pipe organ, or the repetitive tones found in pianos.

[0018] Japanese Patent Publication No. 205092057 discloses an electronic keyboard using a Hall sensor magnetic coupling specifically for detecting key speed. In other respects, the sensor detects only two positions of the key and calculates the key speed. For this reason, such a keyboard is not suitable for emulating the sound of a Hammond organ or pipe organ, or for finding a solution for detecting repetitive tones in a piano.

[0019] Japanese Patent Application Laid-Open No. 0439693 and Japanese Patent Application Laid-Open No. 205092057 relate to an electronic keyboard specialized for piano emulation, considering the use of a magnetic sensor coupling as an improvement over the prior art based on two or three contacts made of conductive rubber. The object of these patents is to measure the key speed as an indirect measurement of the hammer impact force on the string. This itself is not an equivalent measurement because the impact force can also depend on the acceleration applied by the pianist's hand while the key is moving. The measured speed is the average speed in the measurement section between two positions and not the instantaneous speed at the end of the movement.

Prior Art Documents

Patent Documents

[0020]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0021] [ An object of the present invention is to eliminate the drawbacks of the prior art by providing an electronic music keyboard that can recognize the position of each key instantaneously.

[0022] Another object is to provide an electronic music keyboard that can emulate the sounds of mechanical (pipe organ) and electro-mechanical (phonic wheel organ) musical instruments where the sound effects change according to the key position.

[0023] Yet another object of the present invention is to provide an electronic music keyboard that can generate a reliable and as faithful as possible sound signal for a conventional mechanical instrument, and to improve the management of repeated tones in a piano.

Means for Solving the Problems

[0024] These objects are achieved by the present invention with the features of the appended independent claim 1.

[0025] Advantageous realizations of the invention are apparent from the dependent claims.

[0026] The electronic music keyboard according to the present invention uses a magnetic flux density sensor to detect the position of each key. The magnetic sensor is a magnetic flux density sensor (also known as a magnetic induction field). Advantageously, a Hall sensor is used, which generates a linear variable voltage at the output depending on the applied magnetic field.

[0027] Such sensors, unlike mechanical switches, are relatively inexpensive, do not require mechanical interaction, last long, and have no wear. Additionally, magnetic sensors are not affected by the presence of dust, light, and moisture. Such sensors are equipped with a compensation circuit for sensitivity changes during temperature variations.

[0028] Permanent magnets equipped with N and S poles that must be properly positioned are inserted under each key of the keyboard, and a PCB containing Hall sensors for each key is provided. When a key is pressed, the magnet is moved closer to the sensor, increasing the magnetic induction field and causing the sensor to generate a variable voltage at its output. The value is directly and linearly related to the position of the key during its movement.

[0029] Using a control microcontroller, hereinafter referred to as a microcontroller, equipped with the same number of analog / digital acquisition lines as the sensors to be acquired, it is possible to monitor in real time the voltages output from various sensors installed under the keys and, since the voltage is directly proportional to the position of the magnet, i.e., the distance from the sensor, to determine the position of the key at any given moment.

[0030] This keyboard is: - As the key moves, a permanent magnet placed beneath each key approaches the respective sensor housed in the PCB; - An A / D conversion system equipped with the same number of signal lines as the sensors; - A microcontroller that can manage all the signal lines that will be acquired, Includes.

[0031] The microcontroller scans the signal line at regular intervals and determines the voltage supplied by each sensor at the moment of each scan. This voltage is converted into the position of each individual key. This position is then transmitted by the microcontroller to a music signal generation system, such as a digital signal processor (DSP).

[0032] Further features of the present invention will become more apparent from the following detailed description with reference to several exemplary, and therefore non-limiting, embodiments shown in the accompanying figures. [Brief explanation of the drawing]

[0033] [Figure 1] This is an exploded perspective view of the keys, frame, and PCB of an electronic music keyboard according to the present invention. [Figure 2] This is a perspective view of the assembled elements of Figure 1, with the keys in a stationary position. [Figure 3] This is the same diagram as Figure 2, where the key is pressed and at the end of its stroke. [Figure 4] This is a block diagram illustrating the signal processing of an electronic music keyboard according to the present invention. [Figure 5] This is a schematic diagram of a key illustrating the movement of the key from its stationary position to its stroke end position, and the decomposition of the voltage range into 256 values ​​when using an 8-bit A / D converter. [Figure 6] This table illustrates possible choices for nine useful key positions. [Modes for carrying out the invention]

[0034] An electronic music keyboard according to the present invention will be illustrated using a diagram, which is generally shown as reference no. 100.

[0035] The keyboard (100) comprises several keys (1) attached to a frame (2). The keys (1) are hinged to the frame (2) by hinges (C).

[0036] A spring mechanism (of a known type and therefore not illustrated) is inserted between the frame (2) and each key (1) and holds the key in a horizontal position when the key is in a resting position (Figure 2). When the user presses a key (1), the key tilts downward against the action of the spring mechanism (Figure 3). When the user releases the key, the spring mechanism returns the key to its resting position.

[0037] According to the present invention, the keyboard (100) comprises a printed circuit board (PCB) (3) on which a plurality of magnetic sensors (4) equal to the number of keys (1) on the keyboard are mounted. Each magnetic sensor (4) can be a Hall sensor. The magnetic sensors (4) are aligned along a row.

[0038] A magnet (5) with an effective magnetic pole facing each magnetic sensor (4) is attached to each key (1).

[0039] When the key (1) is in a stationary position (Figure 2), a first known distance (d1) exists between the magnetic sensor (4) and the magnet (5).

[0040] When key (1) is at the stroke end position (Figure 3), there exists a second known distance (d2) between the magnetic sensor (4) and the magnet (5) that is shorter than the first distance. Although the second distance (d2) is small, the magnet (5) must not come into contact with the magnetic sensor (4) to prevent physical contact from damaging the sensor due to pressure. More precisely, one of the advantages of the keyboard according to the present invention is the fact that there is no physical contact between the keys and the PCB.

[0041] The frame (2) includes a plate (20) positioned on the leg portion (21), thereby maintaining the plate (20) itself along the horizontal plane. Multiple through slots (22) in the shape of rectangular slots are formed in the plate (20), parallel to each other and aligned along the row.

[0042] The PCB (3) is mounted on the frame (2) under the plate (20), thereby aligning the magnetic sensor (4) of the PCB with the slot (22) of the plate (20).

[0043] The spacer (D) separates the PCB (3) from the frame plate (20). The PCB (3) is attached to the plate (20) by screw means (41). The screw means (41) is screwed to the spacer (D) and to the tongue (23) that protrudes downward from the plate (20).

[0044] The key (1) is attached to the top of the frame plate (20).

[0045] Each key (1) has a fork (10). The fork (10) protrudes downward and is suitable for passing through each slot (22) in the frame plate.

[0046] For example, a support portion (11) having the shape of a parallelepiped is fixed to the fork (10). The holder (11) is suitable for supporting the magnet (5) such that the magnet (5) protrudes downward from the support portion (11). The magnet (5) may have a cylindrical shape.

[0047] Thus, the active pole of the magnet (5) at each key is located under the frame plate (20) and near the respective magnetic sensor (4).

[0048] Referring to Figure 4, each magnetic sensor (4) generates a voltage signal (V) at its output. It is of analog type and is inversely proportional to the distance between the magnet (5) and the magnetic sensor (4). That is, the voltage signal (V) changes from a minimum value when the key (1) is in a stationary position to a maximum value when the key (1) is at the stroke end position.

[0049] When the key (1) is moved downward, the magnet (5) is moved closer to the magnetic sensor (4), generating a voltage change at both ends. The analog voltage signal (V) from each magnetic sensor (4) is continuously digitized by its respective analog-to-digital (A / D) converter (6), which generates digital values ​​(V1, ...Vn) of the voltage signal output by the sensor.

[0050] Each A / D converter (6) is connected to a microcontroller (7) and receives the digital values ​​(V1, ...Vn) of the voltage signals (V) detected by each sensor (4), and converts them into position values ​​indicating the position of the key.

[0051] The A / D converter (6) must be at least an 8-bit converter in order to have sufficient resolution for voltage and the position for the purpose to be realized therein.

[0052] In the case of an 8-bit A / D converter, the microcontroller (7) can convert 256 key position values ​​from the stationary position to the stroke end position. Therefore, the key position can be divided into 256 positions from the stationary position to the stroke end position.

[0053] The microcontroller (7) includes a selection means (70) according to the type of musical instrument to be emulated. From among 256 possible key position values, the selection means (70) selects a number of useful key position values ​​(P1, ... Pm) that indicate useful positions for key (1). A specific sound signal is then activated according to the musical instrument to be emulated, thereby excluding other key position values ​​that do not correspond to useful positions. Each useful key position value (P1, ... Pm) is activated according to the instrument to be emulated, or appropriate parameterization in the computer synthesis model of the musical signal, for a specific sound signal (S * It is associated with S1, ...Sk).

[0054] Therefore, when the keyboard (100) is in use and key (1) reaches a useful position, the microcontroller (7) will emulate the corresponding sound signal (S * It outputs the corresponding useful key position values ​​(P1, ...Pm) associated with S1, ...Sk).

[0055] A microcontroller (7) is connected to a digital signal processor (DSP) (8), which is suitable for modifying the synthesized sound signal (S') according to useful key position values ​​(P1, ... Pm) sent by the microcontroller (7). The synthesized sound signal (S') is generated by a synthesis algorithm (not exemplified as it is a known type) according to the type of instrument to be emulated.

[0056] Next, depending on the key position, the DSP(8) modifies the synthesized signal (S') and the modified sound signal (S * ) generates a modified sound signal (S * The signal is sent to an electroacoustic transducer (9) that generates a musical tone (S).

[0057] Referring to Figure 5, and assuming that an 8-bit A / D converter (6) is used, 256 levels are possible between the minimum voltage value (value 0) and the maximum voltage value (value 255), which correspond to the number of key positions between the stationary position and the stroke end position.

[0058] The A / D converter (6) of each sensor is controlled by a microcontroller (7), which activates and commands the A / D conversion at regular time intervals. Thus, using appropriate time resolution, the microcontroller (7) recognizes the position of the key (1) at each time. From various key positions in the range from the stationary position to the stroke end position, the microcontroller (7) selects several useful key position values ​​(P1, ... Pm) and transmits them to the DSP (8). The DSP (8) modifies the synthesized sound signal (S') and sends the modified sound signal (S') to the electroacoustic converter (9) according to the useful position selected by the microcontroller. * ) generates.

[0059] Referring to Figure 6, the space moved by key (1) can be divided into 256 positions ranging from value 0 to value 255. When the keyboard (100) attempts to emulate the sound of a Hammond organ, the DSP (8) is not configured to modify the synthesized sound signal, but is configured to output nine sound signals (S1, ... S9) of the type synthesized for each key of the keyboard, corresponding to the sounds of the nine phonic wheels in a conventional Hammond organ.

[0060] Therefore, in such cases, only nine specific useful key positions need to be considered, i.e., only the number of useful positions equal to the number of phonic wheels that will be activated. For example, a single region in key movement may be considered. This corresponds to a value between 20 and 29 that is useful for triggering a sound equivalent to the sound produced by the nine phonic wheels associated with a particular key. The region to be considered, the sequence of wheels that will be activated, and the distances between the values ​​can be determined as desired for each key, as long as the resolution of the position detection allows.

[0061] When the microcontroller (7) that controls the A / D converter (6) detects that a useful key position 1-9 has been reached, the microcontroller (7) informs the DSP (8) which of these keys will activate an electronic sound. This electronic sound simulates the sound produced by the phonic wheel of a mechanical Hammond organ, whichever is activated at that moment.

[0062] When the player presses a key downward, the DSP(8) generates a sound signal corresponding to the activated phonic wheel. Otherwise, when the key reaches position 1, the sound signal (S1) corresponding to the sound of phonic wheel 1 is activated. When the key reaches position 2, the sound signals (S1, S2) corresponding to the sounds of phonic wheel 1 and phonic wheel 2 are activated, and this continues until the key reaches position 9, where the sound signals (S1, ... S9) corresponding to the sounds of all nine phonic wheels are activated. If the key continues to move downward beyond position 9, the sound signals (S1, ... S9) corresponding to the sounds of all nine phonic wheels remain activated.

[0063] On the other hand, if the player releases a key or moves the key upward, once the key reaches position 9, some or all of the notes on the phonic wheel will be gradually deactivated.

[0064] The microcontroller (7) uses an appropriate time frequency to inform the DSP (8) of the active state of the phonic wheel, and based on the information received from the microcontroller (7), the DSP generates an audio signal relating to the activated phonic wheel.

[0065] To emulate a pipe organ, the DSP(8) must be configured to modify the synthesized sound signal (S') and simulate opening the valves of a pipe organ to varying degrees depending on the key position.

[0066] In such cases, no separate sound signals are generated; only the combined signal (S') is modified according to the key position. For example, the physical generation model of the modified sound can take the position into account and adjust the attack noise, change the amplitude, or adjust other parameters of the physical model.

[0067] In this case, key positions useful for sound generation can be taken into consideration, according to the type of organ pipe to be emulated.

[0068] When the keyboard (100) emulates a piano, the DSP (8) modifies the synthesized signal (S') and the modified sound signal (S') according to the pressure applied to the keys. * It is configured to generate ).

[0069] Considering that the microcontroller (7) recognizes the time it takes for the key to move from one position to the next, the microcontroller (7) can calculate the speed value (I) of the key, such as the total speed of the key from the stationary position (value 0) to the stroke end position (value 255), or the partial speed of the key from any position to the stroke end position. Since the speed value (I) of the key is proportional to the pressure applied to the key, a part of the information in the partial speed of the key is important for simulating in a very accurate way what is recognized as "repetitive tone". The speed value (I) is sent from the microcontroller (7) to the DSP (8), whereby the DSP generates a sound signal much more accurately than the prior art based on the speed value of the key indicating the pressure applied to the key. Due to the linearity of the voltage with respect to the key position, the difference between two consecutive voltage values corresponds to an equal distance at the key position. Therefore, the measurement time between any two positions corresponds to an accurate speed evaluation.

[0070] The present invention also relates to a signal processing method for an electronic music keyboard (100).

[0071] The method includes the following steps: - dividing the position of each key of the keyboard into at least 256 positions between the stationary position and the stroke end position; - selecting a plurality of useful positions from among the at least 256 key positions; - associating sound signals (S * , S1,... Sk) with the selected useful positions, also accompanied by differentiation detection for each key, according to the musical instrument to be emulated; - detecting the position of each key while using the keyboard; - emitting the sound signals (S * , S1,... Sk) associated with the detected useful key positions; and - emitting a musical tone (S) according to the emitted sound signals (S * , S1,... Sk).

[0072] Similar variations and modifications can be made to embodiments of the present invention by those skilled in the art, but they still fall within the scope of the present invention as specified in the appended "Claims".

Claims

1. An electronic music keyboard (100), Multiple keys (1), A number of magnetic sensors (4) equal to the number of keys, A permanent magnet (5) is disposed on each key (1) such that its magnetic pole faces the respective magnetic sensor (4) so ​​that it moves closer to the magnetic sensor (4) or away from the magnetic sensor (4) in accordance with the movement of the key, and the magnetic sensor (4) is configured to output an analog type voltage signal (V) that is inversely proportional to the distance between the permanent magnet (5) and the magnetic sensor (4), In order to digitize the voltage signal (V) generated by the magnetic sensor and to output a plurality of digital values ​​(V1, ..., Vn) indicating the position of the key, an A / D converter (6) is connected to each magnetic sensor (4), A microcontroller (7) is connected to the A / D converter (6) and is configured to receive the digital values ​​(V1, ...Vn) indicating the position of the key and to convert the digital values ​​(V1, ...Vn) into key position values. To generate at least one sound signal (S*, S1, ... Sk), a digital signal processor (DSP) (8) connected to the microcontroller (7) is used. The system comprises an electroacoustic converter (9) connected to the DSP (8) and configured to receive at least one of the aforementioned sound signals (S*, S1, ... Sk) and thereby generate a musical tone (S), Here, the electronic music keyboard (100) is, Each A / D converter (6) is an at least 8-bit converter capable of providing at least 256 digital values ​​(V1, ..., Vn) indicating the position of the key, The microcontroller (7) is configured to convert at least 256 of the digital values ​​(V1, ..., Vn) from each A / D converter (6) into at least 256 key position values ​​that change from the stationary position to the stroke end position. The microcontroller (7) is equipped with a selection means (70) according to the type of musical instrument to be emulated, and the selection means (70) is configured to select from at least 256 key position values ​​a plurality of key position values ​​(P1, ... Pm) associated with each sound signal (S*, S1, ... Sk) according to the musical instrument to be emulated. The microcontroller (7) is configured to output the plurality of key position values ​​(P1, ... Pm) corresponding to the positions of the keys when the keyboard is used. The digital signal processor (DSP) (8) is configured to receive the plurality of key position values ​​(P1, ... Pm) emitted by the microcontroller, and accordingly emit the sound signals (S*, S1, ... Sk) associated with the plurality of key position values ​​to the electroacoustic converter (9) which emits musical tones (S), An electronic music keyboard (100) characterized by the following.

2. The electronic music keyboard (100) according to claim 1, wherein the magnetic sensor (4) is a Hall sensor.

3. The electronic musical keyboard (100) according to claim 1 or 2, wherein the magnetic sensor (4) is mounted on a PCB (3) which is disposed beneath a plate (20) on a frame (2) on which the key (1) is mounted.

4. The electronic music keyboard (100) according to claim 3, wherein the magnetic sensor (4) is positioned on the PCB (3) and aligned along the row.

5. The electronic music keyboard (100) according to claim 3, wherein the plate (20) of the frame has a plurality of through slots (22) arranged in parallel positions aligned along a row, and the PCB (3) is fixed to the frame (2) below the plate (20) so that the magnetic sensors (4) of the PCB are aligned with the slots (22) of the plate (20).

6. The electronic musical keyboard (100) according to claim 5, wherein each key (1) has a fork (10), a support (11) is attached to support the permanent magnet (5), and the fork (10) protrudes downward from the key so as to intersect the respective slots (22) in the plate of the frame.

7. The electronic music keyboard (100) according to claim 3, further comprising a spacer (D) disposed between the PCB (3) and the plate (20) of the frame, thereby separating the PCB from the plate of the frame.

8. The electronic musical keyboard (100) according to claim 1 or 2, wherein the DSP (8) is configured to output nine sound signals (S1, ... S9) for each key of the keyboard, corresponding to the sounds of the nine phonic wheels in a conventional Hammond organ.

9. The electronic music keyboard (100) according to claim 1 or 2, wherein the DSP (8) is configured to modify a synthesized sound signal (S') according to the plurality of key position values ​​(P1, ... Pm) sent by the microcontroller (7), and to generate a modified sound signal (S*) sent to the electroacoustic transducer (9).

10. The electronic musical keyboard (100) according to claim 9, wherein the synthesized sound signal (S') is a pipe organ sound signal, which is modified according to the various degrees of opening of the valves of the pipe organ based on the position of each key.

11. The microcontroller (7) is configured to detect the key velocity value (I) as the space moved by the key, between two key positions divided by the time spent by the key, in order to move the key velocity value (I) through space and send the key velocity value (I) to the DSP (8). The electronic musical keyboard (100) according to claim 1 or 2, wherein the DSP (8) is configured to receive the key speed value (I), modify the synthesized sound signal (S'), and output the modified sound signal (S*) based on the key speed value (I) indicating the pressure applied to the key.

12. A signal processing method for an electronic music keyboard (100) according to claim 1 or 2, The steps include dividing the position of each key on the keyboard into at least 256 positions between the stationary position and the stroke end position, The steps include selecting multiple positions from at least 256 of the key positions, The steps include associating sound signals (S*, S1, ... Sk) with the selected multiple positions according to the musical instrument to be emulated, The steps include detecting the position of each key while using the aforementioned keyboard, The steps include: emitting the sound signals (S*, S1, ... Sk) associated with the detected key positions and the plurality of positions; A step of emitting a musical tone (S) according to the sound signal (S*, S1, ... Sk) that has been emitted, A signal processing method including the following.

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