JPH0934455A - Electronic musical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize a semiautomatic performance function at a distance or in the state of moving by equipping a semiautomatic musical performance means for successively reading out sound data from musical performance data and processing a sound on the basis of operational information transmitted by a radio transmission system. SOLUTION: The transmitter circuit 6 of a keyboard part 1 performs, for instance, the FSK modulation of digital information inputted from a scan circuit 4 or a panel circuit 5 and then transmits it. The receiver circuit 12 of a main body part 2 receives a signal transmitted from the transmitter circuit 6 and outputs digital information to a CPU 9 by utilizing an interruption or the like. The CPU 9 controls the whole of the electronic musical instrument main body 2 on the basis of a control program stored in a ROM 10. A program, a timbre paraeter, a frequency information table, melody data and the like are stored in the ROM 10. In a sound source circuit 13, the waveform of a musical sound is successively read out from the ROM 10 at an address interval proportional to a sound to be produced and a musical sound signal is generated by multiplying it by an envelope signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument, and more particularly to an electronic musical instrument having a combination of a semi-automatic performance function and a wireless transmission function.

[0002]

2. Description of the Related Art Some conventional electronic musical instruments have a semi-automatic performance function in which stored performance data is played in accordance with the timing by hitting an arbitrary key at a predetermined timing.

[0003]

In a conventional electronic musical instrument having a semi-automatic performance function, all circuits or devices from a keyboard to an amplifier or a speaker are housed in one electronic musical instrument housing, and the electronic musical instrument moves on a stage, for example. However, there was a problem that it was not possible to play using the semi-automatic performance function. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to provide an electronic musical instrument that can use a semi-automatic performance function while being moved or moved away.

[0004]

According to the present invention, a semi-automatic performance function and a wireless transmission function are combined to generate sound by timing information for semi-automatic performance, or sound generation control information or sound control information output from the semi-automatic performance function. The feature is that the generated musical tone signal is transmitted to a distant place using a wireless transmission function, and finally a musical tone is generated at the distant place. With such a configuration, the present invention makes it possible to perform a performance using a semi-automatic function while moving from a remote place or moving, so that the performance can be performed more easily and the degree of freedom during the performance is improved.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the first embodiment of the present invention. The keyboard section 1 of the electronic musical instrument includes a keyboard 3, a scan circuit 4, a panel circuit 5, a transmission circuit 6, and an antenna 7. The keyboard 3 is composed of, for example, a plurality of keys each having two switches, and the scanning circuit 4 scans the states of the plurality of switches of the keyboard,
The state change is detected, and information such as key-on, key-off, and touch is generated. The panel circuit 5 includes various switches for selecting a tone color and a circuit for detecting a change in the state of the switch and generating panel event information. The transmission circuit 6 is
The digital information input from the scan circuit 4 or the panel circuit 5 is FSK-modulated and transmitted. Any signal format can be used, for example RS23
It may be transmitted in byte units in the 2C signal format.

The main body portion 2 of the electronic musical instrument is provided with a receiving circuit, a control portion, and a tone generating portion. The receiving circuit 12 receives the signal transmitted from the transmitting circuit 6 and outputs digital information to the CPU 9 by using an interrupt or the like. CPU9
Is a central processing unit that controls the entire electronic musical instrument body 2 based on a control program stored in the ROM 10. The ROM 10 stores a program, a tone color parameter, a frequency information table, and the like, as well as music data described later. The RAM 11 is used as a work area and a buffer and also stores the panel state and the like. Further, the battery may be backed up.

The tone generator circuit 13 is a circuit for generating a tone signal by a waveform reading method, for example, and sequentially reads tone waveforms from a waveform memory in which digital tone waveform information is stored at address intervals proportional to the pitch to be produced. , Has a plurality of tone generation channels for generating tone signals by multiplying the envelope signals. Actually, a plurality of tone signals can be simultaneously and independently generated by time-division multiplexing operation of one tone generation circuit. The D / A converter 14 converts the digital tone signal into an analog signal, and the tone signal amplified by the amplifier 15 is sounded by the speaker 16. Bus 17
Connects the circuits in the electronic musical instrument. If necessary, a floppy disk drive circuit, a memory card interface circuit, a MIDI interface circuit, etc. may be provided.

FIG. 2 is an explanatory diagram showing the structure of various data existing on the RAM 11. FIG. 2A shows the structure of music data, and each music data is composed of, for example, a 4-byte data unit. The first byte is the status byte,
The type of the data unit is shown. For example, 9 is sound generation (key on), 8 is sound generation (key off), 12 is tone color designation,
0 is determined as invalid data (do nothing). This invalid data is inserted at a timing at which no sound is produced, and the data unit that is no longer needed as a result of editing the song data is made invalid data, thereby eliminating the need for deleting and filling the data. When the C flag of the most significant bit is 1, it indicates that the next tone generation data should be processed at the same time.

The second byte pitch (timbre number) data is
Key number data is stored in the case of tone generation start data, and if it is 60, for example, it represents C3. Further, in the case of tone color designation data, a tone color number is stored. At the 3rd byte, in the case of sound generation start data, key pressing strength data is stored. Tone color series data is stored in the 4th byte, which corresponds to channel data in a MIDI signal, for example. A tone color number is designated for each of the plurality of tone color sequences by tone color designation data. In the case of sound generation start data, sound generation is started with a tone color having a tone color number preset in the specified tone color sequence. . As tune data, for example, melody performance data of an arbitrary tune is stored for high notes, and accompaniment performance data of the tune is stored for low notes.

FIG. 2B shows the configuration of system data, and the event read pointer and the event write pointer are used for controlling the event queue buffer shown in FIG. 2C, respectively. DC is a direct call flag, and is used to determine the call source of each key-divided event processing routine, as described later. MD is a mode flag indicating whether or not the key division mode is set. FIG. 2C shows the structure of the event queue buffer. For example, based on a key-on or tone color designating event transmitted from the keyboard unit 1, event data in 4-byte units is written by interrupt processing described later. The capacity is, for example, 1 kilobyte, and the structure of the event data is the same as the data unit of the music data shown in FIG. 2A. However, the status data is key-divided A or B event. Is added.

FIG. 3 is a flow chart showing the main processing of the CPU 9. When the power of the electronic musical instrument is turned on, the data in the tone generator circuit and the RAM are initialized in step S1. In step S2, it is determined whether the event read pointer and the event write pointer in the system data match. If they do not match, the process proceeds to step S3, but if they match, they should be processed. Since the event does not exist in the buffer, the process proceeds to step S12, and other processing, for example, control processing of the channel being sounded, automatic performance processing, effect addition processing, and the like are performed.

In step S3, 4-byte event data is read from the read pointer position of the event queue buffer and the read pointer is updated. In step S4, it is determined whether or not the status of the read event data is key-on A (key-on of area A), and if the result is affirmative, the process proceeds to step S5 and key-on A processing described later is performed. . Step S
In 6, it is determined whether the status of the read event data is key-on B. If the result is affirmative, the process proceeds to step S7 and the key-on B process is performed.

In step S8, it is determined whether or not the status of the read event data is the change mode. If the result is affirmative, the process proceeds to step S9 and the change mode processing described later is performed. In step S10, it is determined whether or not the status of the read event data is another status (key off, tone color designation, etc.), and if the result is affirmative, the process proceeds to step S11 and other status processing is performed. .

FIG. 4 is a flow chart showing the reception interrupt processing of the CPU 9. This process is activated each time the receiving circuit 12 receives data and interrupts the CPU 9. In step S20, the received data is the area A (the area on the lower tone side of the predetermined key on the keyboard).
If the result is affirmative, the process moves to step S21 to write the key-on A event data from the address indicated by the write pointer of the event queue buffer and update the write pointer. In step S22, it is determined whether or not the received data indicates a key-on in the B area (area on the high-pitched sound side above a predetermined arbitrary key of the keyboard). If the result is affirmative, the process proceeds to step S23. Then, the key-on B event data is written from the address indicated by the write pointer in the event queue buffer, and the write pointer is updated.

In step S24, it is determined whether or not the received data indicates that the mode switch is on. If the result is affirmative, the process proceeds to step S25 and the mode change event is written in the event queue buffer. In step S26, it is determined whether or not the event indicates another event. If the result is affirmative, the process moves to step S27 to write the other event in the event queue buffer.

FIG. 5 is a flowchart showing the key-on A process of step S5 or the key-on B process of step S7. In step S30, from the music data corresponding to the A (B) area as shown in FIG.
Based on the contents of a data counter (not shown), the data unit to be sounded next is read. In step S31, a tone generation process is performed based on the read data unit. In step S32, it is determined whether or not the C flag of the data unit is 1, and if the result is affirmative, the process returns to step S30 and the sounding process of the next data unit is performed.

When the C flag is 0 in step S32, the process proceeds to step S33, and MD and DC
It is determined whether or not both flags are 0. When MD is 0, the key-division mode is not set, so the other key-on process also needs to be activated, and when DC is 0, it indicates that the other key-on process was not called. There is. If the result is affirmative, the process proceeds to step S34. In step S34, D
The C flag is set to 1, and in step S35,
The other key-on process, key-on B (A) process, is called (activated). In the key-on processing started here, since the DC flag is 1, the determination result of step S33 becomes negative, and the other key-on processing is not started again. In step S36, the DC flag is reset to 0.

FIG. 6 shows the change mode process of step S9. In step S40, the MD flag is read from the system data, and in step S41, the read MD flag is inverted. Step S42
At, the inverted MD flag is written in the system data area. By the above-described processing, data is wirelessly transmitted in response to the key-on of each of the two areas A and B, and each piece of music data is semi-automatically played.

FIG. 7 is a block diagram showing a second embodiment of the keyboard section 1. In the first embodiment, since the keyboard device 3 and the scanning device 4 are provided, the device and the circuit scale become large. However, when the semi-automatic performance function is used, in the areas A and B, Multiple keys are not required, as one of the arbitrary keys can be pressed. Therefore,
In the embodiment shown in FIG. 7, for example, two push button switches 2 corresponding to the areas A and B on the keyboard 20 are provided.
1 and 22 are provided. Then, in response to the depression of each switch, the code generator 23 generates key-on data of one predetermined key among arbitrary keys in each area.
Then, the transmission circuit transmits the data. With such a configuration, the keyboard portion 20 can be downsized to, for example, the size of a card and can be used even in a narrow place such as in a vehicle. At least one switch may be provided, or a mode changeover or tone color changeover switch may be added.

FIG. 8 is a block diagram showing a third embodiment of the present invention. In this embodiment, the keyboard section 30 is provided with a function for generating a musical tone signal of an electronic musical instrument, and the analog musical tone signal output from the D / A converter 14 is FM-modulated by a transmitting circuit 31 and transmitted, for example. It is received by a receiving device 32, for example, a radio or a stereo device, and sounded. With this configuration, it is possible to use a widely used device as a receiving device. Note that the digital signal before D / A conversion is wirelessly transmitted and then D / A
You may convert.

FIG. 9 is a block diagram showing a fourth embodiment of the present invention. In this embodiment, a MIDI signal is wirelessly transmitted from the keyboard section 40. The keyboard section 40 is provided with a control section including a CPU 9, a ROM 10 and a RAM 11 as in the third embodiment, converts event information output from the scan circuit 4 or the panel circuit 5 into MIDI information, and a MIDI interface. Circuit 41 to MID
An I signal is output. The transmission circuit 31 modulates the MIDI signal by, for example, the FSK method and transmits it. The receiving circuit 12 is F
It demodulates the SK signal and outputs a MIDI signal. MIDI
As the function-equipped electronic musical instrument 42, any device such as a MIDI function-equipped electronic piano, a keyboard, a sound source module, and a personal computer can be used.

Although the embodiment has been described above, the following modifications are also possible. In the embodiment, in the case of the key separation mode, the semi-automatic performance function is independently executed corresponding to the two areas, and when not in the key separation mode, the music data corresponding to the respective areas are simultaneously played. However, if the keys are not separated, only one piece of music data may be played semi-automatically. Also,
When the keys are separated, only one may be in the semi-automatic performance mode and the other may be in the normal performance mode or the fully automatic performance mode. As for the method of key separation, in addition to separating a specific key into right and left, an arbitrary separation method such as a white key, a black key, and two keyboards can be adopted.

Since the performance data in the embodiment differs from the performance data for automatic performance only in the presence or absence of timing data, it is possible to use the data for automatic performance in the semi-automatic performance of the present invention. However, in this case, the key-off data is unnecessary, so skip it. Regarding the wireless transmission method, in addition to ordinary wireless transmission using electromagnetic waves, infrared transmission used in remote controllers and the like can also be used. Regarding the modulation method, if it is digital information, FM, PM,
A for analog signals such as QAM and pulse position modulation
Any method such as M, FM, PCM can be adopted.

In the semi-automatic performance, if two keys are pressed by mistake, two tones will be produced at the same time, and the performance timing will be shifted. Therefore, when a key-on is detected, a guard time may be provided that ignores the next key-on for a predetermined time (for example, a fraction of the regular key-on interval).

[0025]

As described above, according to the present invention, the semi-automatic performance function and the wireless transmission function are combined to generate the sounding timing information for the semi-automatic performance, or the sounding control information or the sounding control information output from the semi-automatic performance function. The musical tone signal generated by is transmitted to a distant place using the wireless transmission function, and finally the musical tone is generated at a distant place, so it is possible to perform using the semi-automatic function while moving to a distant place or moving. Therefore, there is an effect that the performance can be performed more easily and the degree of freedom during the performance is improved.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram showing a structure of various data.

FIG. 3 is a flowchart illustrating main processing of a CPU.

FIG. 4 is a flowchart showing a reception interrupt process of a CPU.

FIG. 5 is a flowchart showing key-on A (B) processing.

FIG. 6 shows a change mode process of step S9.

7 is a block diagram showing a second embodiment of the keyboard section 1. FIG.

FIG. 8 is a block diagram showing a third embodiment of the present invention.

FIG. 9 is a block diagram showing a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Keyboard part, 2 ... Electronic musical instrument main body, 3 ... Keyboard, 4 ... Scan circuit, 5 ... Panel circuit, 6 ... Transmission circuit, 7, 8 ... Antenna, 9 ... CPU, 10 ... ROM, 11 ... RAM, 12
... Reception circuit, 13 ... Sound source circuit, 14 ... D / A converter, 1
5 ... Amplifier, 16 ... Speaker, 17 ... Bus

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor ▲ Taka ▼ Kiyomi 200 Terashima-cho, Hamamatsu City, Shizuoka Prefecture Kawai Musical Instrument Co., Ltd. (72) Taichi Kosugi 200 Terashima-cho, Hamamatsu City, Shizuoka Prefecture Kawa, Ltd. (72) Inventor Kenichi Hirota 200, Terashima-cho, Hamamatsu City, Shizuoka Prefecture Kawai Musical Instrument Co., Ltd. (72) Iku Matsunaga, 200, Terajima-cho, Hamamatsu City, Shizuoka Prefecture Kawai Musical Instrument Co., Ltd.

Claims (5)

[Claims] 1. Input means for inputting operation information, transmission means for transmitting the input operation information to another location by a wireless transmission method, and performance data storage means for storing performance data consisting of a sounding data string. An electronic musical instrument comprising: a semi-automatic playing means for sequentially reading out sound generation data in performance data based on the transmitted operation information and performing sound generation processing. 2. An input means for inputting operation information, a performance data storage means for storing performance data consisting of a sound data sequence, and sound data in the performance data sequentially read out based on the input operation information. An electronic musical instrument comprising: a semi-automatic playing means for performing sound generation processing; and a transmitting means for transmitting a generated musical tone signal to another place by a wireless transmitting system. 3. Input means for inputting operation information, performance data storage means for storing performance data consisting of a sound data sequence, and sound data in the performance data sequentially read out based on the input operation information. An electronic musical instrument comprising a semi-automatic playing means for converting into a MIDI signal and a transmitting means for transmitting the generated MIDI signal to another place by a wireless transmission system. 4. The electronic musical instrument according to claim 1, wherein the input means is a switch. 5. The input means is a keyboard, and the keyboard is divided into a plurality of areas, and the performance data storage means and the semi-automatic performance means are provided corresponding to at least one area. The electronic musical instrument according to any one of items 1 to 3.