JP2855968B2 - Music control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a musical tone control device which detects a bending of a joint or the like in each limb such as a finger, a wrist or an elbow of a human and controls a musical tone in accordance with the bending.

[0002]

2. Description of the Related Art As is well known, in a natural musical instrument, it is common to play a string or a keyboard, or to blow a tube to form a musical tone, and most electronic musical instruments play a keyboard. This generates a musical tone.

[0003] By the way, if it is possible to generate musical tones based on the natural movements of human beings, it will be a performance operation that is out of the sense of playing with a conventional musical instrument, and a new performance pleasure and a new performance effect will be obtained. Can play. For example, a bending motion of a finger, a wrist, an elbow, a shoulder, or the like is a daily natural motion and is often used for choreography such as dance. Therefore, if the musical tone can be controlled based on these movements, it is possible to perform the musical tone control in accordance with this operation or a dance incorporating the bending movement. Therefore, from such a viewpoint, the present applicant has departed from the concept of playing and has proposed an electronic musical instrument that controls musical sounds in accordance with bending of human hands and feet.

In this type of electronic musical instrument, as described above, a bending angle detector for detecting a bending angle of a human hand or foot is used. In a conventional bending angle detector, a combination of two potentiometers has been used. Such a bending angle detector detects a change in two orthogonal directions to determine a bending angle.

[0005] In the tone control apparatus using the bending angle detector as described above, tone control is performed according to the state at the time when the operation is completed. For example, when the operation stops at a large acceleration, that is, when the operation stops after a steep operation, the sound source is controlled so as to generate a musical tone with a short sustain, and when the operation stops at a small acceleration, that is, the operation is performed slowly. When the sound source is stopped after the sound source, the sound source is controlled so as to generate a long sustained musical sound.

[0006] In detecting the change in operation, the time from the start of bending of the bending angle detector to the time when a predetermined threshold value is exceeded is measured. If the time is short, it is determined that the operation has been sharply stopped and then stopped. If the time was long, it was determined that the operation was performed slowly and then stopped.

[0007]

By the way, the above-mentioned musical tone control device measures the time from the start of bending of the bending angle detector to the time when a predetermined threshold value is exceeded.
Although the operation state is detected, the movement of the finger is actually complicated, and the state at the time of stopping the operation cannot be accurately detected only by measuring the length of the time. For this reason, there has been a problem that the performance intention of the player does not match the musical tone to be pronounced.

The present invention has been made in view of the above circumstances, and can accurately detect a state at the time of stopping operation.
It is another object of the present invention to provide a musical tone control device capable of matching a musical intention of a player with a musical tone to be produced.

[0009]

In order to solve the above-mentioned problems, the present invention detects an operation of a part of a player's body and outputs an operation amount signal corresponding to the operation amount. Amount detection means, operation end detection means for detecting the end time of the operation based on the operation amount signal output from the operation amount detection means, and the end time of the operation detected by the operation end detection means and a predetermined time Operating parameter calculating means for calculating an operating parameter obtained from an operating displacement from a previous time point, wherein the musical tone is controlled based on the operating parameter.

[0010]

The movement amount detecting means detects a movement of a part of the performer's body, outputs a movement amount signal corresponding to the movement amount, and the movement end detecting means detects the movement of the player based on the movement amount signal. An end time is detected, an operation parameter obtained from an operation displacement between the end time and a point in time before a predetermined time is calculated, and a musical tone is controlled based on the operation parameter.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of one embodiment of the present invention. The input glove 1 is worn on the player's right and left hands. FIG. 2 shows the configuration of the input glove 1. The fingers of the right glove 1a are numbered from the thumb to the little finger as finger numbers (0), (2), (4), (6) and (8). ), And the fingers of the left glove 1b are numbered (1), (3), (5), (7) and (9). Further, a bending sensor 2 whose resistance value changes according to the bending angle of the finger is provided at each finger portion of the input means 1. These bending sensors 2
Is formed of a resistor formed on a flexible base member, and the resistance of the resistor is detected by a predetermined detection circuit (not shown), and is converted into an analog signal whose voltage changes in accordance with the change in the resistance. After that, it is supplied to the A / D converter 3 shown in FIG. The deeper the finger is bent,
The voltage of the analog signal supplied to the A / D converter 3 increases.

The A / D converter 3 converts the analog signal into a digital signal and supplies the digital signal to the microcomputer 4. The microcomputer 4 has a CP
U, a ROM, a RAM, a timer, etc., which are used as control means for controlling the entire electronic musical instrument. In this embodiment, in particular, in the present embodiment, the resistance value of the bending sensor provided on the input glove 1 is set. Based on the change, the time from the start to the end of the bending of the finger, the bending amount, the bending speed, the bending acceleration, and the like are calculated. Next, the function switch 5 includes a plurality of switches, a volume, and the like provided on a panel of the electronic musical instrument, and sets a tone color, a rhythm, and the like. The display 6 displays the data set by the function switch group 5 and the status of the electronic musical instrument. Further, the tone generator 7 synthesizes a tone signal (digital data) according to the parameters set by the input glove 1 and the function switch group 5 and supplies this to the sound system 8. After converting the tone signal into an analog signal, the sound system 8 emits a tone using a speaker (not shown).

Next, the details of the above operation will be described with reference to FIG.
This will be described with reference to the flowchart shown in FIG.
FIG. 3 is a main routine for explaining the operation of this embodiment. In this figure, first, in step SA1, initialization is performed. Next, in step SA2, it is determined whether or not a predetermined time t (second) has elapsed after performing the following processing in steps SA3 and SA4. The process bypasses SA4 and proceeds to step SA5. If the predetermined time has elapsed, the process proceeds to step SA3. In step SA3, a right hand detection processing routine shown in FIG. 4 is performed. [Right hand detection processing routine] In the right hand detection processing routine,
In step SB1, "0" is substituted for a variable i.
Next, in step SB2, the variable register FD
(I) (Hereinafter referred to as a variable FD (i). The same applies to other registers.) The bending data of the i-th finger is fetched. here,
The i-th bending data is stored while the right hand detection processing routine is started m times. Then, in step SB3, the bending data of n samples (m> n) before is taken into OFD (i), and the process proceeds to step SB4. Step SB
In step 4, the variable FD (i) -variable OFD (i) is stored in the speed SPD (i). That is, the bending speed from the position n samples before to the current position is stored in the speed SPD (i).

Next, at step SB5, the speed SP
It is determined whether D (i) has exceeded a predetermined threshold value STH (i). Here, if it is determined that the right finger is not bent, that is, it is not moving, the result of the determination in step SB5 is “NO”, and the flow proceeds to step SB6. In step SB6, "0" is stored in the maximum speed MPS (i) in which the maximum speed is stored.

On the other hand, if the result of the determination in step SB5 is "YES", that is, if the finger is bent, or if the finger is already bent and is moving until it stops, the process proceeds to step SB7. move on. In step SB7, if the speed SPD (i) is higher than the maximum speed MPS (i), the speed SPD (i) is stored in the maximum speed MPS (i). In other words, here, only the maximum speed is the maximum speed M
PS (i).

When step SB6 or SB7 is completed, the process proceeds to step SB8. In step SB8, it is determined whether or not the variable i has become "8" or more, that is, whether or not the data has been acquired for all the fingers of the right hand. yet,
If data on all fingers has not been captured, the result of the determination in step SB8 is "NO", and the flow proceeds to step SB9. In step SB9, the variable i is incremented by “2”, the variable i is set as the next finger number, and the process returns to step SB2. Then, data for the finger numbers “2”, “4”, “6” and “8” are sequentially taken in. When the data acquisition for all fingers is completed, the result of the determination in step SB8 is “Y
ES ”, and proceeds to step SB10. at this point,
The maximum speed MSP (i) corresponding to each finger stores the maximum speed.

In step SB10, it is determined whether or not the finger of the variable max has stopped. Specifically, the speed SPD
(I) is a predetermined threshold value STH '(i) (STH'
(I)> STH (i)) It is determined whether or not the following condition is satisfied.
The variable max includes the finger number of the finger that is bent deepest among the moving fingers, that is, the speed SPD.
(I) While the condition of ≧ STH (i) holds, the variable FD (i)
Has the largest finger number stored. Step SB1 above
If the determination result at 0 is “NO”, that is, if the finger bent most deeply has not stopped yet, the process proceeds to Step SB11. Then, in step SB11, the finger number of the above condition is stored in the variable max.

On the other hand, when the finger of the finger number stored in the variable max stops, the result of the determination in step SB10 is "YES", and the flow proceeds to step SB12. In step SB12, the bending data of the finger bent at the deepest designated by the variable max before ΔT is fetched and substituted into the variable IFD (max). Here, the time ΔT
Is determined by ΔT = P · t.
The bending data before T means data before P samples (m> P) that satisfy ΔT = P · t. Next, the flow advances to step SB13 to generate velocity data. The generation of velocity data is performed as follows.

First, from the current bending angle FD (max) of the finger bent most deeply, the bending angle IF of the same finger before ΔT
D (max) is subtracted, and this is stored in a variable A. Next, the maximum speed MSP (max) of the same finger is stored in a variable B. Then, in order to weight each of the variables A and B, they are stored in the variable C as XA + YB (X and Y are weighting coefficients). In this embodiment, the variable C is used as velocity data.

Then, the flow advances to step SB14 to supply the sound source 7 with the variable C as the velocity data, a key code KCD (max) by the left glove described later, and a key-on signal. The tone generator 7 synthesizes a tone signal based on these parameters and supplies the tone signal to the sound system 8. In the sound system 8, the tone signal is converted into an analog signal, and then generated by a speaker. Then, the process proceeds to a step SB11, where the finger number of the above condition is stored in the variable max, the process is terminated, and the process returns to the main routine.

In the main routine, the process then proceeds to a left hand detection processing routine in step SA4 shown in FIG. [Left hand detection processing routine] In the left hand detection processing routine,
First, in step SC1, the bending angle FD (i)
The bending data of each finger of the left hand is taken in (i = 1, 3, 5, 7, 9). Next, the process proceeds to step SC2, where the amount of bending of each finger is compared with the threshold value of each finger, and if it exceeds the threshold value, it is determined that the finger has been bent, and the finger-on data FO is determined.
"1" is stored in N (i). If the value does not exceed the threshold value, it is determined that the finger is not bent, and “0” is stored. Next, the process proceeds to step SC3, and calculates the pitch of a musical tone played with the right hand according to the combination of the finger-on data FON (i). Here, a method of calculating the pitch will be described.

In the present embodiment, FIG.
Three tables shown in (a), (b) and (c) are prepared. FIG. 6A shows the finger-on data F of the left thumb.
It is a scale specification data table of each finger of the right hand for ON (1). For “0” of the finger-on data FON (1), “0” is applied to the right thumb (i = 0) and the index finger (i)
= 2) to “2”, middle finger (i = 4) to “4”, ring finger (i =
6) stores the scale designation data FN0 (i) of "5" and the little finger (i = 8) of "7".

Also, "1" of the finger-on data FON (1)
, "5" for the right thumb (i = 0), "7" for the index finger (i = 2), "9" for the middle finger (i = 4), and "11" for the ring finger (i = 6). And "12" for the little finger (i = 8)
Is stored.
That is, when the thumb of the left hand is not bent, each finger of the right hand has “0 (do)”, “2 (re)”,
“4 (mi)”, “5 (fa)” and “7 (so)” are assigned. On the other hand, when the left thumb is bent, “5 (fa)”, “7”
(So) "," 9 (la) "," 11 (shi) "and" 12
(C) "is assigned. FIG. 6B shows finger-on data FON (3) and FON (5) of the index finger of the left hand.
8 is an octave designation data table based on the combination of. Data OCT designating an octave of a musical tone that is generated according to a combination of FON (3) and FON (5)
Are stored, and “4”, “6”, and “7” are stored with FON (2) and FON (3) as “0” and “0” as the reference “5”, respectively.

That is, when the index finger and the middle finger of the left hand are not bent, the octave designation data is set to "5", which is used as a reference. When the index finger of the left hand is not bent and the middle finger is bent, the octave designation data is set to “4”, and the octave is decreased by one octave from the above case. FIG. 6C is a semitone (#b) designation data table based on a combination of the finger-on data FON (7) of the ring finger of the left hand and the finger-on data FON (9) of the little finger of the left hand. FON
The semitone data HT for designating the semitone of the musical tone to be pronounced according to the combination of (7) and FON (9) is stored, and FON (7) and FON (9) are based on “0” and “0”. As "± 0 (natural)",
(Flat) "," +1 (sharp) "and" ± 0
(Natural) "is stored. In other words, control is performed such that the musical tone to be emitted is raised or lowered by a semitone depending on the bending state of the left ring finger and the little finger.

In step SC3 described above, the pitch of the musical tone is calculated in accordance with the following equation using the data of these tables. When the finger-on data FON (1) is “0”, KCD (i) = FN0 (i) + (12 × OCT) + HT, and when the finger-on data FON (1) is “1”, KCD (i) = FN1 (i) + (12 × OCT) + HT. When the above processing ends, the processing ends and the process returns to the main routine. In the main routine, the process proceeds to step SA5, performs other processes according to the switching of the timbre by the function switch, and the like, returns to step SA2, and repeatedly executes the above processes.

In the right hand detection processing routine, the method of calculating the velocity data C has been described. Alternatively, the sustain of the musical tone may be controlled by the displacement (angle) from the time of the stop to the time before ΔT. Further, the displacement amount δ1 before ΔT1 from the stop time and the displacement amount δ2 further before ΔT2 from the time before △ T1 are obtained, and from these values, C = A · δ1 +
The variable C may be calculated using the formula B (δ2−δ1), and this may be used for sustain control of musical sounds. Also, not only the maximum speed MSP (max), but also the second fastest data,
The third fastest data may be used instead, or their average value may be used.

[0027]

As described above, according to the present invention, the movement amount detecting means detects the movement of a part of the player's body, and outputs a movement amount signal corresponding to the movement amount. The operation end detecting means detects an end time of the operation based on the operation amount signal, calculates an operation parameter obtained from an operation displacement between the end time and a point in time before a predetermined time, and based on the operation parameter. Since the musical tones are controlled, it is possible to obtain an advantage that the state when the operation is stopped can be accurately detected, and the musical intention to be played can be matched with the musical intention to be played.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of one embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a configuration of an input unit shown in FIG.

FIG. 3 is a flowchart showing a main routine for explaining a detailed operation of the embodiment.

FIG. 4 is a flowchart showing a right hand detection processing routine for explaining the operation of the embodiment.

FIG. 5 is a flowchart showing a left hand detection processing routine of the embodiment.

6A is a scale designation data table for each finger of the right hand with respect to finger-on data FON (i), FIG. 6B is an octave designation data table based on a combination of finger-on data FON (2) and FON (3), (C) is a diagram showing a semitone (#b) designation data table based on a combination of finger-on data FON (4) and FON (5).

[Explanation of symbols]

1 ... input gloves (movement amount detecting means), 4 ... microcomputer (operation end detecting means, operation parameter calculating means), 7 ... sound source circuit (musical sound synthesis means).

Claims (1)

(57) [Claims] 1. Detecting movement of a part of a player's body,
An operation amount detection unit that outputs an operation amount signal corresponding to the operation amount; an operation end detection unit that detects an end time of the operation based on the operation amount signal output by the operation amount detection unit; Operating parameter calculation means for calculating an operation parameter obtained from an operation displacement between the end time of the operation detected by the means and a point in time before a predetermined time, and controlling a musical tone based on the operation parameter. Music control device.