JP4389841B2 - Key range dividing apparatus and program - Google Patents

Description

  The present invention relates to a key range dividing device having a function of automatically changing a key range dividing position.

As for the key range dividing technique of an electronic keyboard instrument, for example, as shown in Patent Document 1, the keyboard is divided into two or more key ranges at a key range dividing point (split point). There are known ones that assign different timbres, tone ranges or functions (ordinary performance and automatic accompaniment chord designation, etc.). Here, the key range division point is designated by simultaneously operating a predetermined operator (split point designation switch) and a key at a position to be divided.
Japanese Patent Laid-Open No. 2002-341871

On the other hand, as shown in Patent Document 2, a technique for dynamically controlling a key range dividing point according to the position of a key operated by a performer is also known. Specifically, in each divided key range, pay attention to a predetermined note (for example, a note closest to the key range division point among the notes being pressed), and each time the note of interest is updated, the key range division point is changed. I try to update it.
JP-A-9-160557

  However, in the technique according to Patent Document 2, it is very difficult to change the key range division point during the performance. Therefore, it is necessary for the performer to perform while paying attention to the key range division point, and to perform the key range division. The performance that crosses the points cannot be performed, and the range of performance is narrowed. In the technique disclosed in Patent Document 2, the key range dividing point is automatically updated according to the performance, but if the key range dividing point is crossed, it is treated as another key range. It is not possible to perform like this, and as a result, the performance is narrowed.

  In view of such circumstances, it is an object of the present invention to provide a key range dividing apparatus that can automatically change and control a key range division position according to a performance state by a performer.

  According to the main feature of the present invention, a keyboard (14k) composed of a plurality of keys (C1 to C6) and a keyboard (14k) divided by a key range division position (S; for example, Sa and Sb in the case of two divisions) Characteristic assigning means (S1 to S2) for assigning individual musical tone control characteristics (for example, α, β for two divisions) corresponding to each key range (for example, Kα, Kβ for two divisions), and keyboard (14k) Hand detection means (18, 10) for detecting the type of the hand and the position on the keyboard (14k) for the hands (AL, AR; BL, BR) of a plurality of performers (A, B) S3) and the key range division position (S) according to the positions of the plurality of hands (AL, AR; BL, BR) detected by the hand detection means (18, 10; S3), A plurality of performers (A, 10) detected by the hand detection means (18, 10; S3) Among the hands (AL, AR; BL, BR) of B), priority is given to the position of a specific type of hand of a specific player (for example, the right hand AR of the left player A or the left hand BL of the right player B). A key range splitting device (computer) comprising a key range control means (S4) for controlling the key range split position (S) is provided, and a keyboard comprising a plurality of keys (C1 to C6) (14k) and each of the keyboards (14k) divided by the key range division position (S; for example, Sa, Sb in the case of two divisions) is provided to a computer functioning as a key range division device (electronic music device). A characteristic assignment step (S1 to S2) for assigning individual musical tone control characteristics (eg, α, β in the case of two divisions) corresponding to the key range (eg, Kα, Kβ in the case of two divisions), and a keyboard (14k ) Hands of multiple performers (A, B) located above (AL For AR; BL, BR), a hand detection step (S3) for detecting the type of hand and the position on the keyboard (14k) (AL to R), and a plurality of hands (AL) detected in the hand detection step (S3) , AR; BL, BR) according to the position of the key range division position (S), and at that time, a plurality of performers (A, B) detected in the hand detection step (18, 10; S3). Of the hands (AL, AR; BL, BR), the key division is performed with priority given to the position of a specific type of hand of a specific player (for example, the right hand AR of the left player A or the left hand BL of the right player B). There is provided a key range dividing program (claim 3) for executing a procedure comprising a key range control step (S4) for controlling the position (S). Note that the parentheses indicate the corresponding reference symbols, terms, and the like of the embodiments added for convenience of understanding.

  In the key range dividing apparatus according to the present invention, the key range control means (S4) is obtained by the hand detection means (18, 10; S3) by one type of hand (eg, AL) of the same performer (eg, A). When it is detected that the number of hands (for example, AR) has been exceeded, each key range (for example, performers A; B) corresponding to the performer (A) is detected by the key range characteristic assigning means (S2). The musical tone control characteristics assigned to the four hands AL, AR; the four keys corresponding to BL and BR, the keys corresponding to the hand AL and AR of the performer A) are replaced (claim 2). be able to.

  In the key range dividing system according to the present invention (claims 1 and 3), the keyboard (14k) composed of a plurality of keys (C1 to C6) has a key range dividing position [S: Sa, Sb (in the case of two divisions, for example). Key area division point, also referred to as split point)] is divided into a plurality of key areas (for example, Kα, Kβ in the case of two divisions), and each key area (Kα, Kβ) is assigned a key area characteristic function (S2). Are assigned individual musical tone control characteristics (for example, α, β in the case of two divisions), and a plurality of players (A, B) located on the keyboard (14k) by the hand detection function (10, 18; S3). ) Hand [AL, AR; BL, BR: FIG. 3 (a)], the type of the hand and the position on the keyboard (14k) are detected, and are basically detected by the key range control function (S4). Depending on the position of multiple hands (AL, AR; BL, BR) Position (S) is controlled, for example, two hands positioned in the center (for example, in the case of two split AR, BL) is automatically set in the middle of the. In this case, for a specific type of hand of a specific performer (for example, the right hand AR of the left performer A or the left hand BL of the right performer B) detected by the hand detection function (10, 18; S3), The key range division position (S) is controlled with priority given to the position of the keyboard. For example, the key division is performed on the right side of the right hand (AR) regardless of the position of the right hand (AR) of the left player (A). The position (Sb) is set, or the keyboard division position Sb is set on the left side of the left hand (BL) no matter where the left hand (BL) of the right player (B) moves.

  According to the present invention, as described above, the positions of the hands of a plurality of performers are detected, and the key range division position (key range division point, split point) is dynamically determined according to the detected positions of the plurality of hands. Therefore, even if a performer performs a performance that crosses the previous key division position, the key division position is appropriately changed accordingly, and a wide range of performances are possible. . Furthermore, since it is configured to control the key range division position by giving priority to the position of the specific type of the detected player's hand, according to the movement of the specific type of the hand of the specific player, A wide range of performances can be performed by dynamically and appropriately changing the key division position.

In the key range dividing apparatus according to the present invention (Claim 2), one type of hand (for example, AL) of the same performer (for example, A) is transferred to the other type by the hand detection function (18, 10; S3). If it is detected that the player's hand (for example, AR) has been exceeded, the key range characteristic assigning means (S2) detects the four hands of each key range (for example, performer A; B) corresponding to the player (A). AL, AR; among the four key ranges corresponding to BL, BR, the musical tone control characteristics assigned to the player A's hand AL, AR) are switched. That is, one type of hand (for example, the left hand AL), such as when the same player (for example, A) crosses the left and right hands (AR, AL) and moves to a position different from the original arrangement relationship. Is detected to have exceeded other types of hands (for example, the right hand AR), the key range division position (S) is controlled accordingly, for example, between these hands (AR, AL). In addition to being automatically set, the musical tone control characteristics previously assigned to each key range are replaced and set in the new key range divided at the key range division position (S). Therefore, according to the present invention, an appropriate musical tone control characteristic can be assigned to each key range in accordance with the movement of the left and right hands of each performer.

[System Overview]
The electronic music apparatus in which the function of the key range dividing device according to the present invention is incorporated is a kind of computer having a music information processing function including a key range dividing process, and is typically an electronic piano, electronic organ, electronic keyboard, electronic A so-called “electronic musical instrument” such as a piano with a control function is used, but a general-purpose information processing device such as a personal computer having a predetermined music information processing function with an external keyboard device can also be used.

  FIG. 1 is a block diagram showing the hardware configuration of an electronic music apparatus according to an embodiment of the present invention. This electronic music apparatus includes a central processing unit (CPU) 1, a random access memory (RAM) 2, a read only memory (ROM) 3, an external storage device 4, a performance operation detection circuit 5, a setting operation detection circuit 6, and a display circuit 7. , Sound source circuit 8, effect circuit 9, image recognition device 10, MIDI interface (I / F) 11, communication interface (I / F) 12, etc. These elements 1 to 12 are connected to each other via a bus 13. The

  The CPU 1 executes various music information processing including key range division processing using a clock by a timer according to a predetermined control program. The RAM 2 is used as a work area for temporarily storing various data necessary for these processes. In order to execute these processes, the ROM 3 stores various control programs including a key range division program, preset key range division data, performance data, and the like in advance.

  The external storage device 4 is not only a built-in storage medium such as a hard disk (HD) but also a compact disk read only memory (CD-ROM), a flexible disk (FD), a magneto-optical (MO) disk, a digital multipurpose disk ( Various data can be stored in an arbitrary external storage device 4 including various portable external recording media such as a small memory card such as a DVD and a smart media (registered trademark).

  The performance operation detection circuit 5 detects the operation contents of the performance operator 14 including a keyboard (14k: see FIG. 2), an expression pedal (14p: see FIG. 2), and the setting operation detection circuit 6 has a switch, a mouse, and the like. Are detected, and information corresponding to the detected contents is introduced into the system main body. For example, the setting operator 15 includes a key division processing start / end switch, a switch that can be assigned an initial key division division position designation function, and a key range for setting musical tone control characteristics in each key range of the keyboard 14k. A characteristic setting switch is included.

  The display circuit 7 includes a display 16 such as an LCD for displaying various screens necessary for performance and setting, and other various indicators / lamps (not shown), and controls the display / lighting contents in accordance with instructions from the CPU 1. Then, display assistance for the operation of the operators 14 and 15 is performed.

  The tone generator circuit 8 generates a musical tone signal corresponding to the operation key based on the performance operation of the keyboard 14k, and the effect circuit 9 has an effect imparting DSP and imparts an effect to the musical tone signal from the tone generator circuit 8, This circuit can also include software. Both circuits 8 and 9 constitute a musical tone signal generator, and generate musical tone signals based on various musical tone control parameters including musical tone control characteristics set corresponding to each key range of the keyboard 14k. The musical tone signal generators 8 and 9 can also generate an automatic accompaniment musical tone signal based on the performance data stored in the storage means 3 and 4. The sound system 17 placed after the effect circuit 9 includes a D / A converter, an amplifier, and a speaker, and generates a musical sound based on a musical sound signal from the effect circuit 9.

  The image recognition device 10 constitutes a hand detection unit together with the imaging device 18 connected thereto. For example, as shown in FIG. 2, the imaging device 18 images the keyboard 14 k of the electronic music device from the upper left and right using two imaging cameras 18 a and 18 b. Image data including the keyboard 14k imaged by the imaging cameras 18a and 18b and the player's hand is sent from the imaging device 18 to the image recognition device 10, and the image recognition device 10 analyzes the image data and performs the keyboard performance. The type of the performer's hand and the position on the keyboard 14k are detected, and the detected hand type and hand type information indicating the position of the hand and hand position information can be introduced into the system body.

  Further, another MIDI music device 30 is connected to the MIDII / F11, and MIDI performance data can be exchanged with the other music device 30 and used in this electronic music apparatus. Further, a communication network 40 such as the Internet or a local area network (LAN) is connected to the communication I / F 12 to receive a control program, various data, and the like from an external server computer 50 and store them in the external storage device 4. Can do.

[Example of arrangement of hand detection devices]
A hand detection device such as an imaging camera is provided on the electronic music device according to the embodiment of the present invention. In the example of FIG. 2, as described above, the two imaging cameras 18a and 18b positioned above both ends of the keyboard 14k are used as the hand detection device. Each camera 18a, 18b is installed on the electronic music device casing, and can capture the entire key range of the keyboard 14k. In addition, since an infrared camera can photograph a biological image clearly, it is preferable to use an infrared camera for the imaging cameras 18a and 18b. The image recognition device 10 applies image recognition technology known in the art to analyze images captured by the cameras 18a and 18b, and arranges each finger, the size of the hand, the length of the finger, Depending on the thickness, skin color, etc., the right hand or left hand of the performer, the hand of the first performer or the hand of the second performer, and so on, and the positions of these hands Each “hand position” on the keyboard to be detected is detected.

  As for the installation position of the hand detection device, it may be a part of the housing of the electronic music device as shown in FIG. 2, or an arm is fixedly or detachably extended from the housing, and the hand detection is performed on the arm. A device may be installed. Moreover, you may use hand detection apparatuses other than a camera for the detection of the kind and position of a hand.

[Example of key division]
In the electronic music apparatus according to one embodiment of the present invention, when the type and position of the performer's hand is detected by the hand detection device by the automatic key range dividing function, the key is set according to the detected type and position of the hand. The area division position (S) can be dynamically controlled. FIG. 3 shows an example of key area division according to one embodiment of the present invention. In the following description, the key range division position S (Sa to Sc) indicating the split point is represented by the lowest pitch key of the high pitch side key range Kβ.

  Here, the characteristics of the electronic music apparatus according to an embodiment of the present invention will be briefly described as follows with reference to FIG. 3. The electronic music apparatus (key area dividing apparatus) has a plurality of keys C1 to C1. The keyboard 14k made of C6 is divided into a plurality of key ranges Kα, Kβ by the key range dividing positions S = Sa, Sb, Sc, and the individual musical tone control characteristics α, β are respectively assigned to the key ranges Kα, Kβ. The positions of the player's hands AL, AR;..., L, R on the keyboard 14k are detected by the hand detectors 18, 10. Then, the key range division position S is dynamically controlled according to the position of the hand detected along with the player's keyboard performance. For example, the two hands AR and BL at the center of the keyboard or the left and right hands L and R It is automatically set to the middle (a2, b2). Further, when the left and right hands R and L are crossed and the positional relationship is different from the original one, the musical tone control characteristics β and α are set in the new key ranges Kα and Kβ. Furthermore, in the case of two-player performance, the key range division position S can be set with priority given to the position of a specific type of hand of a specific player (for example, the right hand AR of the player A).

  This will be described in more detail below. FIG. 3A shows an example of key range division in the case of a two-player mode in which two performers A and B perform a keyboard performance. In the state of (a1), a key range division position S is set at a position Sa (F3) substantially in the middle of the left and right performers A and B who play the keyboard 14k, and the entire key range (in the figure, C1 to C1) is set. C6) is divided into a left key range Kα (= C1 to E3) and a right key range Kβ (= F3 to C6). Individual musical tone control characteristics α and β are assigned to each key range. For example, the individual key ranges Kα and Kβ are used for teachers and students, and the individual musical tone ranges (eg, left) are used as the musical tone control characteristics α and β. Only the key range Kα can be set 2 octaves higher than the original pitch of each key) and individual timbre parameters (eg, different piano timbres). Therefore, the hands AL, AR, BL, BR of both performers A, B are placed in the respective key ranges Kα, Kβ, and each performer A, B plays the keyboard in each key range Kα, Kβ. In the meantime, the key range division position Sa is maintained, and a tone signal according to the corresponding tone control characteristics α and β is generated from the tone generators 8 and 9.

  Here, for example, as shown in (a2), when the right hand AR of the left player A crosses the key range division position Sa at that time, the key range division position S is automatically updated to the position Sb. That is, in the example of (a2), the fact that the right hand AR of the player A performing in the left key range Kα has moved to the right key range that is equal to or higher than the division position Sa (= F3) indicates that the hand detection unit 18 including the cameras 18a and 18b. , 10, a new key range division position S = Sb (for example, B3) is set according to the position of the right hand AR of the player A who has moved and the position of the left hand BL of the player B adjacent to the right. The Therefore, the musical tone control characteristics (sound range and timbre parameters) α and β are assigned to each divided key range Kα (= C1 to A # 3), Kβ (= B3 to C6) determined by the new divided position Sb (= B3). Although the player A on the left performs the keyboard performance across the original division position Sa, a musical tone signal is generated in accordance with the musical tone control characteristic α corresponding to the original left key range Kα. be able to.

  Although not shown, every time the right and left performers A and B's hands straddle the key range division position S set at that time, the division range position is determined by the automatic key range division function. A new key range division position S is set in accordance with the position of the hand that has moved across.

  FIG. 3B shows an example of key range division in a single player mode in which a single player performs a keyboard performance. In the state of (b1), the keyboard 14k is set with a key range division position S at a position Sa (F3) approximately at the center of the performer who plays it, and the entire key range (C1 to C6) is the left key range Kα. (= C1 to E3) and right key range Kβ (= F3 to C6). Individual musical tone control characteristics α and β are assigned to each key range, and the musical tone control characteristics α and β are different, for example, a bass tone color in the left key range Kα and a piano tone color in the right key range Kβ. Tone parameters are set. For this reason, while the performer is performing with the left and right hands L and R placed in the respective key ranges Kα and Kβ, the key range division position Sa (= F3) is maintained, and the corresponding respective musical tones are maintained. Musical tone signals according to the control characteristics α and β are generated from the musical tone generation units 8 and 9.

  Here, for example, as shown in (b2), when the player's right hand R crosses the current key division position S = Sa, the key division position S is automatically updated to a new position Sb. . That is, in the example of (b2), when the hand detection unit 18 or 10 detects that the right hand R playing in the right key range Kβ has moved to the left key range beyond the division position Sa (= F3), the right hand range Kβ has moved. A new key range division position S = Sc (for example, G2) is set according to the position of the player's right hand R. Therefore, the musical tone control characteristics (tone color parameters) α and β are assigned to the new divided key ranges Kα (= C1 to F # 2) and Kβ (= G2 to C6) determined by the new divided position Sc (= G2). Even if the right hand R performs a keyboard performance across the original division position Sa, it is possible to generate a musical tone signal in accordance with the musical tone control characteristic β corresponding to the original right key range Kβ.

  Although not shown in the drawings, every time the player's left and right hands straddle the current key range division position S, the position of the hand moved across the division position by the key range automatic division function Accordingly, a new key range division position S is set.

  As in (a2) and (b2), between the two hands AR and BL in the middle of the four hands AL and AR; BL and BR (two-player performance), or between the two hands L and A When the division positions Sb and Sc are only set in the middle (single performance), the hand detection units 18 and 10 do not need to detect the type of the hand, but only the position of the hand. However, if it is configured to detect the type of hand, the key range division position S is set by giving priority to the movement of a specific type of hand, or the tone control characteristic α assigned to each divided key range Kα, Kβ. , Β can be interchanged.

  For example, when the performers A and B perform both hands in the two-player mode as shown in FIG. 3A, the right hands AR and BR and the left hands AL and BL of the left and right performers A and B can be recognized. By doing so, regardless of the position of the right hand AR of the player A on the left side, the key range division position Sb is set on the right side of the right hand AR, or the left hand BL of the player B on the right side is determined. Even if it is in the position, the key range division position Sb is set in response to a specific player's hand movement with priority, such as setting the key range division position Sb to the left of the left hand BL. be able to.

  Also, if the hand type, that is, the right hand R; AR, BR and the left hand L; AL, BL, can be identified, when the hand is moved so that the type of the hand is different from the original arrangement, The musical tone control characteristics α and β assigned to the divided key ranges Kα and Kβ can be exchanged. For example, when the left and right hands R and L are crossed in the solo performance mode, the key range division position S is set and changed between these hands R and L, and the left key range (corresponding to left hand performance) until then. The musical tone control characteristic α assigned to Kα is set to the right key range Kβ, and the musical tone control characteristic β previously assigned to the right key range (corresponding to right hand performance) Kβ is set to the left key range Kα, The musical tone control characteristics α and β can be interchanged. Such replacement of the musical tone control characteristics α and β is further divided into two parts corresponding to the left and right hands in the two-player mode, respectively, in the two key ranges Kα and Kβ corresponding to the left and right performers A and B. In this case (all key ranges are divided into four corresponding to the four hands AL, AR, BL, and BR of the performers A and B), the same applies.

[Key area split processing flow example]
FIG. 4 is a flowchart showing the procedure of key area division processing according to one embodiment of the present invention. In FIG. 4, when this processing flow is started by operating the key range division process start switch in the setting operator 15, the CPU 1 first initializes the key range division position S to the keyboard 14k in the first step S1. To do. In this case, with respect to the initially set key range division position S, predetermined default division position data is used, or an operator assigned the initial key range division position designation function in the setting operator 15 and the keyboard 14k. The keys to be set as the key range division position S are simultaneously determined by one or a plurality of performers placing their hands on the keyboard 14k, and the division positions described in FIGS. 3 (a2) and (b2). Similar to the automatic update setting method, an arbitrary method such as setting a division position in the middle of a plurality of hands can be adopted.

  Since the key range division position S is changed after the initial setting, it is preferable that the key range division position S is notified to the player at any time by appropriate display means. In this case, as the display means, the key range division position S or each key range may be displayed on the keyboard image displayed on the display 16, or a lamp is provided corresponding to each key of the keyboard 14k. You may make it light the lamp | ramp corresponding to the division position S or each key range.

  In the next step S2, an individual musical tone control characteristic is assigned to each divided key range using the key range characteristic setting switch in the setting operator 15. For example, in addition to assigning individual timbres, individual functions such as assigning individual tone ranges or specifying chords for normal performance and automatic accompaniment can be assigned to each divided key range. Further, for example, a plurality of musical tone control characteristics may be assigned to each key range, such as assigning individual tone colors and individual tone ranges to each divided key range at the same time.

  In the next step S3, the type and position of the hand or the position of the hand is detected. In the subsequent step S4, the key range division position S is updated according to the detected type and position of the hand or the position of the hand. A predetermined musical tone control characteristic is assigned to each key range based on the updated key range division position S. Here, whether to detect the type and position of the hand or only the position of the hand depends on the required key range division characteristics.

  For example, in step S3, as shown in FIG. 3, a key range division position is simply set between the two middle hands among the four hands in the two-player mode, or two hands are set in the single-player mode. If only the key range division position is set between the two, it is not necessary to detect the hand type, and only the hand position is detected.

  However, if it is configured to detect the hand type in step S3, in step S4, as already described, a division position is set according to the type of hand (for example, in the case of two-player performance, FIG. 3). As in (a2), regardless of the position of the right hand AR of the left player A, the position of the right hand AR is prioritized and the division position Sb is set on the right side of the right hand AR). When the hand is moved differently from the original arrangement, the tone control characteristics assigned to the divided key ranges are switched (for example, when the left and right hands L and R are crossed in the case of FIG. 3B). For example, it is possible to set the musical tone control characteristic α assigned to the left hand in the right key range Kβ and set the musical tone control characteristic β assigned to the right hand in the left key range Kα.

  Thereafter, the process proceeds to step S5 to determine whether or not the key release operation has been performed on the keyboard 14k. When the key release operation has not been performed (S5 → NO), the process returns to step S3, and the above-described steps S3 to S5 are performed. Repeat the operation. When a key release operation is performed (S5 → YES). Proceeding to step S6, the musical tone control is performed through the musical tone signal generators 8 and 9 in accordance with the musical tone control characteristic assigned to the key range to which the operated key belongs, and thereafter the routine proceeds to step S7.

  In step S7, it is determined whether or not the key range dividing process end switch in the setting operator 15 has been operated. If there is no such end operation (S7 → NO), the process returns to step S3, and the steps described above are performed. The operations from S3 to S7 are repeated. When there is an end operation (S7 → YES), this process ends.

[Various Embodiments]
The preferred embodiment of the present invention has been described above with reference to the drawings. However, this is merely an example, and the present invention can be variously modified without departing from the spirit of the invention. For example, with regard to the number of key range divisions, a specific example of dividing into two key ranges with one key range division position (split point) is shown in the embodiment, but the number of key range divisions is 3 or more with an arbitrary number of 2 or more Can be divided into any key range.

  Also, when dividing into four or more key ranges, a part of the three or more key range division positions are similar to the conventional method in that an operator and a key to which an initial key range division position designation function is assigned are assigned. It may be set by an operation with the key to be the zone division position S, and for the remaining key zone division positions, the division position may be set in the middle of a plurality of hands by the method of the present invention. Further, the number of keys is not limited to 61 keys of C1 to C6, and may be more or less.

  Further, the tone control characteristics assigned to each divided key range are not limited to different tone colors, different tone ranges, and different functions (such as chord designation for normal performance and automatic accompaniment). In addition, for example, a plurality of tone control characteristics may be assigned to each key range, such as assigning different timbres and ranges.

  Regarding the method of setting the key range division position, in the embodiment [FIG. 3 (a2), (b2)], a new division position [Sb, Sc] is set to the left side in FIG. 3 (a2). The right hand AR of the performer A and the left hand BL of the right player B, in FIG. 3 (b2), are set at the center of each hand L, R]. The position may be set at any position between the hands on both sides (in the case of two people, the right hand of the left player and the left hand of the right player, each hand in the case of one). For example, as in the embodiment, in addition to setting in the center of the hands on both sides, it is set on the right side of the left hand on both sides, or on the right side of the right hand on both sides. be able to. In addition, regarding the setting of the key range division position, the performer may be able to select any one of such multiple types of positions.

  In the embodiment [FIG. 3 (a2), (b2)], the case where the hand is moved so as to cross the divided position [Sa: FIGS. 3 (a1), (b1)] has been described. Of course, the division position may be updated even if the hand is moved in a state where there is no mark. If there is no state, the result of the musical tone control does not change even if the division position is not updated, so it is not necessary to update.

It is a block diagram showing the hardware constitutions of the electronic music apparatus by one Example of this invention. It is a figure showing the example of arrangement | positioning of the hand detection apparatus by one Example of this invention. It is a figure showing the example of the key range division | segmentation by one Example of this invention. It is a flowchart showing the example of a procedure of the key range division | segmentation process by one Example of this invention.

Explanation of symbols

18 Imaging device (hand detection device) having imaging cameras 18a and 18b,
AL, BL, L; AR, BR, R Left hand and right hand,
Kα, Kβ Key range division position S; left and right key ranges divided and set to the keyboard 14k by Sa to Sc.

Claims (3)

A keyboard consisting of multiple keys,
Characteristic assigning means for assigning individual musical tone control characteristics corresponding to each key range of the keyboard divided by the key range division position;
For the hands of a plurality of performers located on the keyboard, hand detection means for detecting the type of hand and the position on the keyboard;
The key range division position is controlled according to the positions of the plurality of hands detected by the hand detection means, and at that time, among the hands of the plurality of performers detected by the hand detection means, a specific type of a specific player is selected. A key range splitting device comprising key range control means for controlling the key range split position with priority on the position of the hand.   The key range control means responds to the performer by the key range characteristic assigning means when it is detected by the hand detection means that one type of hand of the same player exceeds the other type of hand. The key range dividing device according to claim 1, wherein the musical tone control characteristics assigned to each key range to be exchanged are replaced. A computer having a keyboard composed of a plurality of keys and functioning as a key range dividing device,
A characteristic assignment step for assigning individual musical tone control characteristics corresponding to each key range of the keyboard divided by the key range division position;
For a plurality of performer's hands located on the keyboard, a hand detection step for detecting the type of hand and the position on the keyboard;
The key range division position is controlled according to the positions of the plurality of hands detected in the hand detection step, and at that time, among the hands of the plurality of performers detected in the hand detection step, a specific type of a specific player is selected. A key range division program that executes a procedure comprising a key range control step for controlling the key range division position with priority on the hand position.

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