JPH06214568A - Electronic musical instrument - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an electronic musical instrument capable of automatically changing a timbre without frequent switch operations. In an electronic musical instrument, storage means for storing a plurality of tone color information in association with the number of times of sounding, counting means for counting the number of times of sounding, and read out tone color information from the memory means based on the output of the counting means. And a tone generation control circuit for controlling the tone color of the tone generated by the tone color information.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to electronic musical instruments, and in particular,
The present invention relates to an electronic musical instrument that adopts a new tone color designation method.

[0002]

2. Description of the Related Art Conventionally, the following types of tone color control systems have been put into practical use in electronic musical instruments. 1. One type of tone color designation information is designated by a panel switch or the like before the start of sounding, and a tone is produced at a pitch according to the pitch designation information input from a keyboard or the like at the time of sounding. 2. When specifying a tone, divide the keyboard into multiple blocks, and specify the tone for each block, so that you can play with multiple tones without changing the tone using a panel switch during performance. . 3. The tone color information and pitch information are stored in association with the key numbers assigned to each key on the keyboard, and when playing, the pronunciation is performed with the corresponding tone color and pitch based on the key numbers input from the keyboard. To do.

In the tone color control system as described above, if a single tone color such as chorus is used even when a human voice is set as the tone color to be pronounced, it can be easily realized by the system of 1 or 2 above. Is possible.

It is also possible to use the above-mentioned method 3 to pronounce human voice timbres such as "do", "re", "mi" ... at pitches corresponding to the timbres. It is possible.

[0005]

[Problems to be Solved by the Invention]
When a plurality of timbres change in succession one after another, when the player tries to play the timbre information by the conventional timbre control method as described above, the performer must manually change the timbre information. There is a problem that it is practically impossible to play the electronic musical instrument.

The object of the present invention is to improve the above-mentioned problems of the prior art, and to avoid frequent switch operations.
It is to provide an electronic musical instrument capable of automatically changing a tone color.

[0007]

In the electronic musical instrument, the present invention is based on a storage means for storing a plurality of tone color information in association with the number of times of sounding, a counting means for counting the number of times of sounding, and an output of the counting means. And a tone generation control circuit for reading tone color information from the storage means and controlling the tone color of the tone generated by the tone color information.

[0008]

By such means, the tone color is automatically changed every time the player presses the keyboard, for example, and it becomes possible to perform a singing voice by an electronic musical instrument which has been impossible in the past.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing a hardware configuration of an electronic musical instrument which is an embodiment. The CPU 1 controls the entire electronic musical instrument such as key assignment and sound generation control. ROM
2 stores programs and data required for control. The RAM 3 stores various control data in the musical instrument, automatic performance data, and the like.

The interface circuit 4 comprises a circuit for scanning the switches of the keyboard 5 and the panel 6 and a circuit for outputting various information to the display under the control of the CPU 1. The keyboard 5 comprises a plurality of keys each having a switch, and the panel 5 has various switches and LC.
It consists of an indicator such as D or LED.

As will be described later, the tone generator circuit 7 reads out waveform data from the waveform memory 8 at address intervals corresponding to pitches and multiplies the envelope waveform to generate a digital tone signal. The D / A converter 9 D / A converts the digital musical tone signal, and the analog musical tone signal is amplified by the amplifier 10 and sounded by the speaker 11. 12 is a bus.

FIG. 2 is a block diagram showing the hardware configuration of the tone generator circuit 7. The DCO (Digital Controlled Oscillator) 20 has an accumulator for address values and has a CPU
Under the control of No. 1, the waveform signal is read from the waveform memory 8 at the address intervals corresponding to the designated frequency to generate a digital tone signal.

A DCF (Digital Controlled Filter) 21 filters the output signal from the waveform memory 8. The tone color of the tone signal can be changed by controlling the DCF 21. A DEG (digital envelope generator) 22 is a circuit that generates a signal for controlling the DCF 21 based on frequency characteristics such as a cutoff frequency designated by the CPU 1.

A DCA (Digital Controlled Amplifier) 23 is a circuit for controlling the envelope, volume, localization, etc. of a tone signal. The DEG (Digital Envelope Generator) 24, based on the envelope rope information, the volume information, etc. designated by the CPU 1,
3 is a circuit for generating an envelope signal for controlling the signal. The DCO 20, DCF 21, and DCA 23 are generally configured to be capable of simultaneously performing independent tone generation processing for a plurality of channels by time division multiplexing processing.

Next, the data will be described. FIG. 3 is a diagram showing an example of the tone color designation number conversion table. In this table, for example, tone color designation numbers corresponding to all the tone colors of human voice are stored, and a code indicating the end is also stored. The performer first enters the tone color information input mode and uses the panel switch or keyboard to
Enter the lyrics of the song you want to play.

Under the control of the CPU 1, the inputted lyrics are converted into tone color designation numbers by searching the tone color designation number conversion table in the ROM or RAM, and registered in the tone color designation number memory area in the RAM in the order of input. . For example, if "ko" and "i" are input, the contents of the tone color designation number memory become "09" and "01". Finally, when the end instruction is given, the end code (eg 127) is stored in the tone color designation number memory.

FIG. 4 is an explanatory diagram showing a data flow during a performance by the tone color control system of the present invention. The outline of data and operation will be described below with reference to this figure. First, when the performer gives an instruction to start playing, the key depression counter is cleared. Then, every time the performer presses a key, the value of the key press counter is incremented by 1
Is added.

The CPU 1 reads the tone color designation number from the tone color designation number memory area using the value of the key depression counter as an address. Next, based on the read tone color designation number and the key number of the pressed key, the tone data block of the tone color and pitch corresponding to the pressed key is read from the tone color data table. This tone data table is
Tone data blocks corresponding to all key numbers are stored for all tone colors.

The read tone data block includes
The start address, envelope information, modulation information, etc. of the waveform memory are stored. The CPU 1 transfers these pieces of information to the DCO 20, the DEG 22, and the DEG 24 of the sound source circuit 7, and instructs the sound generation.

Here, the waveform memory 8 separately stores the waveform data corresponding to all the key numbers of all the tones, but in the case of a human voice, this is on the frequency spectrum. This is because the positional relationship of the formants has an important meaning, and if an attempt is made to generate a human voice of multiple pitches with one waveform data, the positional relationship of the formants will shift and an unnatural sound will be produced. .

Next, the details of the operation of the embodiment will be described. FIG. 5 is a flowchart showing a process at the time of interruption by the timer of the CPU 1. Although not shown, the CPU 1 has a timer, and the timer periodically interrupts. When an interrupt occurs, the CPU 1 fetches the switch state data of the keyboard 5 or the panel 6 via the interface circuit 4 in step S10.

In step S11, step S1
The data acquired at 0 is compared with the data acquired last time to check whether or not there is a state change. If there is no state change, the process ends, but if there is a state change, the process proceeds to step S12, event data recording which switch has changed to which state, etc. is created and stored in the RAM. Store in the buffer area.

FIG. 6 is a flowchart showing the processing of the main program. When the power of the electronic musical instrument is turned on, first, in step S20, various registers or RA
The control data area in M is initialized. Step S2
In No. 1, it is checked whether or not there is event data in the event data buffer, and if not, step S21 is repeated until the event data is written. If there is event data in the buffer, the process moves to step S22, and the first written event data is read from the buffer.

In step S23, it is checked whether or not the event data is key-on data, and if so, the process proceeds to step S24 to perform a key-on process described later. If it is not the key-on data, the process proceeds to step S25. In step S25, it is checked whether the data is key-off data, and if so, the process proceeds to step S26 and the key-off process is performed.

If it is not the key-off data, step S
27, it is checked whether or not the data is panel switch-on data, and if so, the panel switch-on processing of step S28 is performed. If the event data is not the panel switch on data, it is the panel switch off data, and therefore the panel switch off process is performed in step S29. Steps S24, 26, 2
After the processes of 8 and 29, the process returns to step S21 again, and the process is continued until there is no event data in the buffer.

FIG. 7 is a flow chart showing in detail the key-on process in step S24 of FIG. When the key-on process starts, first, in step S30, 1 is added to the value of the key depression counter. In step S31, C
PU1 reads out the tone color designation number from the tone color designation number memory area based on the value obtained by adding the value of the key depression counter to the head address of the tone color designation number memory.

In step S32, based on the read tone color designation number and the key number of the pressed key,
The tone data block of the tone color and pitch corresponding to the pressed key is read from the tone color data table. The read tone data block stores the start address of the waveform memory, envelope information, modulation information, and the like.

In step S33, the CPU 1 sends these pieces of information to the DCO 20, DEG 22 and D of the tone generator circuit 7.
Transfer to EG24. The actual tone generation control is periodically performed by another timer interrupt (not shown).

By this processing, a tone of a registered tone color (human voice) is generated every time the key is pressed, and a singing voice can be played by the electronic musical instrument.

Next, another embodiment will be described. Although a human voice is generated in the first embodiment, the present invention is not limited to a human voice, and may be applied to, for example, a percussion tone color such as a drum. In this case, since it is sufficient to prepare one waveform data for all tone pitches, it is sufficient to prepare one tone data block for each tone color in the tone color data table of FIG. Further, the pitch control is performed by the DCO 20 in the same manner as the normal tone generation.

Although the two embodiments have been described above, the following modifications are also possible. First, the waveform data corresponding to each tone color is provided separately for each pitch, but as long as it is not unnatural, one waveform data is commonly used for multiple pitches in the same way as a normal tone generation method. It may be used.

The lyrics data or the tone color designation number sequence data corresponding to the lyrics may be input from an external device or output to the external device. In this case, the external device may be a memory card, a storage device such as a floppy disk, a computer, or another electronic musical instrument.

In the electronic musical instrument to which the present invention is applied, the tone color designation method according to the present invention and the conventional tone color designation method may be selected. Further, in order to enable accompaniment, the tone color designating method of the present invention may be applied and the key depression counter may be incremented only when a specific range of the keyboard is played. In this case, the conventional tone color designation method is adopted for a range outside the specified range.

[0034]

As described above, according to the present invention, it is possible to automatically change the timbre each time the performer presses the keyboard. There is an effect that the singing voice that has been possible can be performed. In addition, even if the tone color of a musical instrument such as drums is used, it is possible to obtain a performance effect that has not been available in the past.

[Brief description of drawings]

FIG. 1 is a block diagram showing a hardware configuration of an electronic musical instrument.

FIG. 2 is a block diagram showing a hardware configuration of a tone generator circuit.

FIG. 3 is a diagram showing an example of a tone color designation number conversion table.

FIG. 4 is an explanatory diagram showing the flow of data during performance.

FIG. 5 is a flowchart showing a process at the time of interruption by a timer.

FIG. 6 is a flowchart showing the processing of a main program.

FIG. 7 is a flowchart showing details of key-on processing.

[Explanation of symbols]

1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... Interface circuit, 5 ... Keyboard, 6 ... Panel, 7 ... Sound source circuit, 8 ... Waveform memory, 9 ... D / A converter, 10 ... Amplifier, 11 ... Speaker

Claims (2)

[Claims] 1. Storage means for storing a plurality of tone color information in association with the number of times of sounding, counting means for counting the number of times of sounding, reading tone color information from the memory means based on the output of the counting means, An electronic musical instrument comprising: a tone generation control circuit for controlling a tone color of a tone generated by tone color information. 2. The electronic musical instrument according to claim 1, wherein the timbre includes a timbre of a human voice.