JPH04119396A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To shorten the time difference from key depression to sound generation by interrupting a CPU as a control part when a 1st contact of one of all keys is operated and performing interval control over performance information precedently to sound volume control. CONSTITUTION:When a key of a keyboard 21 is operated, its contact operates and a 1st interruption signal generation device 26 generates an interruption signal INT6 for informing the CPU 3 of the determination of interval information at the same time. The CPU 3 performs a sound generating process, etc., according to the sound volume information INF8 and interval information INF9 and outputs a control signal to a musical sound signal generation device 4. Namely, the interval information over the performance information is performed precedently to the sound volume control to eliminate a processing time regarding the interval information apparently when the processing time regarding the interval information is shorter than the time for obtaining the sound volume information. Consequently, the time from the key operation to the sound generation is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a musical instrument equipped with a volume control mechanism for each scale.

Conventional technology In recent years, many electronic musical instruments have been equipped with initial touch information that is proportional to the keyboard pressing speed, and MIDI (Musical
Instrumet D 1g1tal I n
Equipped with an audio volume control function based on the throat information of the interface) standard.

By the way, conventional electronic musical instruments perform sound generation processing control, etc., when two pieces of information, pitch information and volume information, are available.

Hereinafter, a conventional electronic musical instrument number will be explained with reference to the drawings.

FIG. 5 shows the configuration of an electronic musical instrument when a keyboard is used as a device for inputting performance information. This electronic musical instrument includes a keyboard device 51 for inputting pitch and volume of performance information, a sui-sochi 52 for specifying tone color, etc., a keyboard device 51 and a switch 5.
CP generates control signals etc. based on information obtained from 2.
U (Central Processing U
nit) 53, a musical tone signal generating device 54 that generates a musical signal in response to a control signal from the CPU 53, an amplifier that amplifies the output of the musical tone signal generating device 54, and emits a musical tone, and a speaker. It consists of system 55. In addition, the detailed configuration of the keyboard device 51 is shown in the sixth section.
As shown in the figure. The keyboard device 51 includes a keyboard 61. An initial touch detection device 62 that creates initial touch information, a touch information storage device 63 that temporarily stores initial touch information, a pitch information creation device 64 that creates pitch information, and a pitch that temporarily stores pitch information. It consists of an information storage device 65 and an interrupt signal generation device 66 that notifies the CPU 53 that a key has been pressed. Further, FIG. 3 shows the detailed structure of the contact portion used for detecting the initial touch of the keyboard 61. The keyboard 61 consists of a common surface 33 that is electrically common to all the keys, and a first contact 31 and a second contact 32, one for each key.

The relationship and operation of each of the above components will be explained below.

When a key is pressed on the keyboard 61, a difference in operating time occurs between the first contact 31 and the second contact 32 due to the difference in operating position. The initial touch detection device 62 determines this actuation time difference. This value becomes the initial touch information. This initial touch information is stored in the touch information storage device 63. In addition, the pitch information creation device 64 creates pitch information by detecting whether the second contact point 32 of the keyboard of the first scale of all the keys is activated, and stores this pitch information in the pitch information storage device 65. . Since the second contact 32 operates to determine pitch information and initial touch information, the interrupt signal generator 66 notifies the CPU 5 that the key has been pressed.
It generates an interrupt signal INT56 to notify the third party. The CPU 53 receives the interrupt signal INT56.
The interrupt control device in 3 is activated to know when the key was pressed. The CPU 53 reads the pitch information INF 58 from the pitch information storage device 65 in the keyboard device 51 and the volume information INF 37 from the touch information storage device 63, thereby performing processing related to pitch information, processing related to volume information, and obtaining the switch 52. It performs timbre-related processing on the information received and outputs a control signal to the musical tone signal generator 54. A musical tone signal generator 54 generates a predetermined musical tone signal in response to a control signal from the CPU 53. The sound system 55 amplifies the musical tone signal and emits the sound into the air through a speaker or the like.

Next, FIG. 4 shows the configuration of an electronic musical instrument when an external interface device 41 is used as a device for inputting performance information. This electronic musical instrument receives information (performance information, tone information, etc.) from the outside in serial communication format, etc.
an external interface device 41 that converts the information into a form that can be recognized by the CPU 42, and a CPU 42 that generates control signals etc. based on the information obtained from this external interface device 41.
, a musical tone signal generating device 43 that generates a musical tone signal according to a control signal from the CPU 42, and this musical tone signal generating device 4.
3 and a sound system 44 that amplifies the output of No. 3 and emits musical sounds. Also, information E given from outside
XT45 is byte information, and performance information consists of 3 bytes. The first byte information that is obtained first in time is the status information that indicates that the second and third data are performance information, the second byte information is pitch information, and the third byte information is volume information. be.

The relationship and operation of each of the above components will be explained below.

Assume that performance information consisting of 3 bytes is given from the outside in serial communication format. When the first byte of information is complete, the external interface device 41 outputs an interrupt signal IN.
'Output T46. The CPU 42 receives the interrupt signal INT
46 activates the interrupt control device in the CPU 42,
The CPU 42 reads and analyzes the byte information TNF 47 in the external interface device 41. Since the first byte information is status information, the CPU 42 has the second and third data. When the second byte information is complete, the external interface device 41 issues an interrupt signal INT46.
Output. The CPU 42 receives the interrupt signal and reads the byte information NF47 in the external interface device 41. Since this data is the second byte information following the status information indicating the performance, the C-PLT 42 recognizes this information as pitch information. Furthermore, the CPU 42 recognizes the third byte information as volume information in a similar manner. At this stage, the performance information is complete, and the CPU 42 performs processing related to pitch information, volume information, etc., and outputs a control signal to the musical tone signal generation device 43. A musical tone signal generating device 43 generates a predetermined musical tone signal in response to a control signal from the CPU 42. The sound system 44 emits musical tone signals into the air.

Problems to be Solved by the Invention Electronic musical instruments with the above-mentioned conventional configuration are emitted after performing processing related to pitch information, processing related to volume information, and other processing, so they are emitted after receiving information related to the performance. The problem was that there was a time lag between the two.

The present invention aims to improve the above-mentioned problems, and its first object is to provide a mechanism and its control method that shorten the time difference between when a key is pressed and when it is sounded.

A second object of the present invention is to provide a control method for shortening the time difference between receiving the performance information and producing sound when the performance information is supplied from outside the main body.

Means for Solving the Problems In order to achieve this object, the electronic musical instrument of the present invention is provided with a first contact point and a second contact point for each key, which operate at different key depression depths, and both contacts of each key. An electronic musical instrument that obtains initial touch information based on the difference in activation time between keys is equipped with a mechanism that interrupts the CPU, which is the control unit, when the first contact of any of the keys is activated. Do it in advance.

Furthermore, in an electronic musical instrument equipped with a mechanism that controls the main body by supplying performance information from the main body, the pitch control of the performance information is performed prior to the volume control, and the processing is started immediately after the pitch information signal is obtained. Configure it to do so.

According to the above-described structure, the present invention enables a control method in which pitch control of performance information precedes volume control by providing a mechanism that interrupts the CPU even when the first contact of any of the keys is activated. . Furthermore, this control method in which pitch control precedes volume control is effective when pitch information is obtained temporally earlier than volume information.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 shows the configuration of an electronic musical instrument when a keyboard is used as a device for inputting performance information. This electronic musical instrument consists of a keyboard device 1 for inputting the pitch and volume of the performance, a switch 2 for specifying the tone color, and a control section that generates control signals etc. based on information obtained from the keyboard device 1 and the switches 2. CP that is
It consists of a musical tone signal generating device 4 that generates musical tone signals in response to control signals from U3 and CPU 3, a sound system 5 that includes an amplifier and a speaker that amplifies the output of this musical tone signal generating device 4 and emits musical tones. . Further, the detailed configuration of the keyboard device 1 is shown in FIG. The keyboard device 1 is a keyboard 21
, an initial touch detection device 22 that creates Ininyarta Sochi information, a touch information storage device 23 that temporarily stores initial touch information, a pitch information creation device 24 that creates pitch information, and a pitch information creation device 24 that temporarily stores pitch information. a first interrupt signal generator 26 that notifies the CPU 3 that the first contact 31 of one of the keys has been activated; and a first interrupt signal generator 26 that notifies the CPU 3 that the second contact 32 of one of the keys has been activated. It consists of two interrupt signal generators 27. Further, FIG. 3 shows a detailed configuration of the contact portion used for detecting the initial touch of the keyboard 21. The keyboard 21 consists of a common surface 33 that is electrically common to all the keys, and a first contact 31 and a second contact 32, one for each key.

The relationship and operation of each of the above components will be explained below.

When a key is pressed on the keyboard 21, the first contact 31 is activated. The pitch information creation device 24 creates pitch information by detecting which of the keyboards of which scale the first contact 31 of the keyboard is activated, and stores this pitch information in the pitch information storage device 2.
Store in 5. At the same time, the first interrupt signal generator 26 generates an interrupt signal INT6 to notify the CPU 3 that the pitch information has been determined. The interrupt control device within the CPU 3 is activated by the interrupt signal INT6, and the CPU 3 learns that the pitch information has been determined.

The CPU 3 reads the pitch information INF9 from the pitch information storage device 25 in the keyboard device 1, performs processing in advance that is possible only with the pitch information INF9, and stores the processing results in the main memory. Next, following the first contact 31, the second contact 32
is activated. The initial touch detection device 22 determines the operating time difference between the first contact 31 and the second contact 32, and stores this in the touch information storage device 23 as initial touch information. At the same time, the second interrupt signal generator 27 generates an interrupt signal INT7 to notify the CPU 3 that the volume information has been determined. The interrupt control device in the CPU 3 is activated by the interrupt signal INT7, the CPU 3 learns that the volume information has been determined, and reads the volume information I N F,8 from the touch information storage device 23 in the keyboard device 1. The CPU 3 performs sound generation processing and the like based on the volume information INF3 and the processing result of the pitch information INF9 previously stored in the main memory, and outputs a control signal to the musical tone signal generator 4. The musical tone signal generating device 4 generates a predetermined musical tone signal in response to a control signal from the CPU 3, and emits the sound into the air through the sound system 5.

(Embodiment 2) FIG. 4 shows the configuration of an electronic musical instrument when an external interface device 41 is used as a device for inputting performance information. This electronic musical instrument receives information (performance information, tone information, etc.) EXT45 provided from the outside in serial communication format, etc.
An external interface device 41 that converts into a format that can be recognized by the PU 42, a CPU 42 that generates control signals etc. based on information obtained from the external interface device 41, and a musical tone signal generator that generates musical tone signals in response to the control signals from the CPU 42. It consists of a device 43 and a sound system 44 that amplifies the output of the musical tone signal generator 43 and emits musical tones. Also, information given from outside EXT45
is byte information, and performance information consists of 3 bytes.

The first byte information that is obtained first in time is the status information that indicates that the second and third data are performance information, the second byte information is pitch information, and the third byte information is volume information. be.

The relationship and operation of each of the above components will be explained below.

Assume that performance information consisting of 3 bytes is given from the outside in serial communication format. When the first byte of information is complete, the external interface device 41 outputs an interrupt signal IN.
Output T46. CPU42 uses interrupt signal INT4
6 activates the interrupt control device in the CPU 42, and C
The PU 42 reads and analyzes byte information in the external interface device 41. Since the first byte information is status information, the CPU 42 has the second and third data. When the second byte information is complete, the external interface device 41 outputs an interrupt signal INT46. The CPU 42 receives the interrupt signal and reads the /item information NF47 in the external interface device 41.

Since this data is the second byte information following the status information indicating the performance, the CPU 42 recognizes this information as pitch information, performs processing that can be performed using only pitch information in advance, and stores the processing results in the main memory. Furthermore, when the third byte information is input, the CPU 42 recognizes it as volume information in the same way, and performs pronunciation processing using this volume information and the processing result of the pitch information previously stored in the main memory. etc., and outputs a control signal to the musical tone signal generator 43.

The musical tone signal generator 43 generates a predetermined musical tone signal in response to a control signal from the CPU 42, and discharges it into the air through the sound system 44.

Note that although the interrupt signal INT46 is generated three times in the above example, due to the action of the external interface device 41, the interrupt signal INT46 is generated once.
The interrupt signal INT46 may not be generated when the status information is in the byte, but the interrupt signal INT46 may be generated when the pitch information and volume information in the second and third bytes are obtained.

Although the example above has been shown in which sound is emitted into the air through a sound system, it is of course possible to send the sound to the outside as a signal from the musical tone signal generator 4.43 or to record it.

Effects of the Invention As is clear from the above embodiments, the present invention provides a function to interrupt the CPU when the first contact of any of the keys is activated when performance information is input using a keyboard device. The processing time related to pitch information is reduced by the mechanism provided and the control method in which pitch control of performance information precedes volume control.
If the time from obtaining the pitch information to obtaining the volume information is shorter than the time required to obtain the pitch information, the processing time regarding the pitch information can be virtually eliminated, and the time from when a key is pressed until the sound is produced can be shortened. Note that even if the processing time related to pitch information is longer than the time from when pitch information is obtained to when volume information is obtained, the time from when processing related to pitch information starts to when volume information is obtained is the time related to pitch information. Since it can be used for processing, the time from when a key is pressed to when a sound is produced can be shortened.

When the performance information is supplied from outside the main unit, the pitch control of the performance information is performed using a control method that precedes the volume control, so that the processing time for the pitch information or the time from when the pitch information is obtained to when the volume information is obtained is If it is short, the processing time related to the pitch information can be virtually eliminated, and the time from receiving the performance information to producing the sound can be shortened. Note that even if the processing time related to pitch information is longer than the time from obtaining pitch information to obtaining volume information, the processing time related to pitch information is the time from the start of processing related to pitch information until obtaining volume information. The time from receiving the performance information until the sound is produced can be shortened.

In addition, in the description of the conventional example and the embodiment of the present invention, the CPU
As a means of knowing the timing of generation of performance information, the CPU
Although the explanation has been made using the interrupt control mechanism described above, even if a polling method is used, a control method in which the pitch control of the performance information is preceded by the volume control has the same effect.

[Brief explanation of the drawing]

FIG. 1 is an electrical block diagram of an electronic musical instrument according to Embodiment 1 of the present invention, FIG. 2 is a detailed configuration diagram of the keyboard device section of FIG. 1, and FIG. 3 is a contact point of the keyboard section of FIGS. 2 and 6. FIG. 4 is an electrical block diagram common to the second embodiment of the present invention and a conventional electronic musical instrument corresponding to the second embodiment of the present invention, and FIG. 5 is an electrical block diagram of a conventional electronic musical instrument corresponding to the first embodiment. FIG. 6 is a detailed configuration diagram of the keyboard device section of FIG. 5. 1...Keyboard device, 2...Switch, 3
... CPU (control unit), 4 ... Musical tone signal generation device, 26 ... First interrupt signal generation device, 27 ... Second interrupt signal generation device, 31
...First contact, 32...Second contact.

Claims (2)

[Claims] (1) Each key is provided with a first contact and a second contact that operate at different key pressing depths, and outputs pitch information for each key and initial touch information based on the operating time difference between the two contacts of each key. It includes a keyboard device and a control section that controls to generate a predetermined musical tone signal based on the information from the keyboard device, and when the first contact point of any of the keys is activated, the pitch information of the corresponding key is generated. An electronic musical instrument configured to be able to transmit initial touch information to the control section prior to initial touch information. (2) It is equipped with a mechanism that controls the main body by supplying performance information from outside the main body, and performs pitch control of the performance information prior to volume control, and immediately processes the pitch information after obtaining the pitch information. An electronic musical instrument configured to start.