JPH0553575A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To widen the modification range of rhythm sounds and to enable real-time performance which is rich in expressing ability by providing a parameter generation control means which generates parameters for modifying the rhythm sounds according to its manipulated variable. CONSTITUTION:Rhythm timbre of specific musical instrument sounds is assigned to respective keys 1-2 of an instrument key part 4b respectively. An option selector 4c-1 is used to modify the rhythm sounds and the control parameters such as a pitch and an accent are assigned according to its set position. A wheel 4a generates a level signal corresponding to the manipulated variable of its rotation and the control parameters which are assigned are continuously varied. For example, when the key 1 of the instrument key part 4b is operated, the rhythm sound of snare drums assigned to the key 1 is generated. When the option selector 4c-1 is so set as to control the pitch, the pitch of the snare drum sound is controlled through the operation of the wheel 4a.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument having a rhythm machine function.

[0001]

2. Description of the Related Art In recent years, various electronic musical instruments having a rhythm machine function have been put into practical use. The rhythm machine function is a function of automatically playing a rhythm sound source in accordance with a predetermined rhythm pattern or causing the rhythm sound source to sound in accordance with a performance operation. In addition to automatically playing rhythm patterns, this type of electronic musical instrument produces rhythm sounds of various instrument sounds in response to the player's operations and controls the volume and pitch of this rhythm sound. You can perform real-time performance. In such real-time performance, various operators are operated according to the performance operation, and for example, when the rhythm sound is emphasized or weakened in synchronization with the beat of the music, that is, when the volume of the rhythm sound is controlled. , The accent keys on the panel are operated,
When controlling the pitch of the rhythm sound, the pitch key is operated. These accent keys, pitch keys, etc. are collectively called option keys, and a predetermined control parameter is assigned to each option key. By operating these option keys, the rhythm sound source is controlled according to the control parameter.

[0002]

By the way, in the above-mentioned conventional electronic musical instrument, since each option key is assigned a control parameter as a fixed value, when each option key is operated, a rhythm sound is generated. The modification range is fixed. As a result, the performance of the performer cannot be expressed, and there is a drawback in that the performance lacks expressiveness and lacks expressiveness.
The present invention has been made in view of the above-mentioned circumstances, and an object thereof is to provide an electronic musical instrument capable of widening a range of modifying a rhythm sound and performing a play with rich expressiveness.

[0003]

According to the present invention, an operator for generating operation information, an instruction means for instructing generation of a predetermined rhythm sound according to a performance operation, and a parameter for modifying the rhythm sound are operated by the operation. Parameter generation control means for generating the rhythm sound in accordance with the output of the instruction means, and tone generation means for modifying the rhythm sound according to the parameter generated by the parameter generation control means. It is characterized by having and.

[0004]

According to the above construction, the parameter generation control means generates a parameter for modifying the rhythm sound in accordance with the operation amount of the operator, and the tone forming means forms the rhythm sound according to the output of the instructing means. The rhythm sound is modified according to the parameter generated by the generation control means. As a result, the modification range of the rhythm sound can be widened, and performance with rich expressiveness can be achieved.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an electronic musical instrument according to an embodiment of the present invention. In the figure, reference numeral 1 is a CPU that controls each unit, and its operation will be described later. Reference numeral 2 denotes a ROM, in which a control program used in the CPU 1 and various data tables for data conversion are stored in predetermined storage areas. 3 is CP
A RAM for temporarily storing various calculation data as a work area of U1. In addition, various registers described later,
It is secured in a predetermined storage area of this RAM 3. 4a-4
Reference numeral c denotes a wheel, an instrument key, and a panel operator, which are arranged on the panel surface of the electronic musical instrument shown in FIG. The wheel 4a has a rotatable structure, is composed of a potentiometer of a midpoint return type, and generates a level signal according to the amount of rotational operation. The instrument key 4b is composed of keys 1 to 12, and a rhythm tone color of a predetermined musical instrument sound is assigned to each of these keys. The panel operator 4c is composed of an option selector 4c-1, a volume operator 4c-2, a tempo operator 4c-3, etc. arranged on the panel surface. The option selector 4c-1 is used when modifying the rhythm sound, and assigns control parameters such as pitch and accent according to the setting position of the selector. This control parameter will be described later. On the other hand, the wheel 4a has the option selector 4c-1.
Is used to continuously change the control parameter assigned by.

Reference numeral 5 denotes a display which is composed of an LCD (liquid crystal display element) or the like and which displays various data supplied from the CPU 1. A drive circuit 6 drives the display 5 in accordance with various data supplied from the CPU 1. Reference numeral 7 is an operator detection circuit. This manipulator detection circuit 7
Detects the operated panel operator 4c and generates and outputs a signal corresponding thereto. A key detection circuit 8 generates and outputs a key detection signal Ks corresponding to the operated key of the instrument keys 4b. Reference numeral 9 is a wheel detection circuit. The wheel detection circuit 9 includes a wheel 4a
A / D-converts the level signal generated by the above, and supplies the wheel data Dh obtained by this conversion to the CPU 1.
Reference numeral 10 is a tone generator circuit for forming rhythm sounds of various musical instruments by a well-known waveform memory reading method and outputting the rhythm sounds as musical tone signals. The tone generator circuit 10 modifies the tone signal in accordance with the control parameters described above. This tone signal is
Sound is produced by the sound system 11.

Next, the operation of the electronic musical instrument having the above configuration will be described with reference to FIGS. First, when the electronic musical instrument is powered on, the main routine shown in FIG. 3 is started, and the process proceeds to step Sa1. At step Sa1, initialization is performed and various registers are reset. After that, the CPU 1 repeats an instrument key processing routine (step Sa2), a wheel processing routine (step Sa3), and other processing (step Sa4) described later. As a result, real-time performance processing is performed. The other process shown in step Sa4 is a process when the volume operator 4c-2 or the tempo operator 4c-3 is operated, and, for example, the tempo operator 4c-3 is operated. In this case, the tempo of the generated rhythm sound is controlled. The instrument key processing routine and the wheel processing routine will be described below.

Instrument Key Processing Routine The processing of the CPU 1 proceeds to step Sa2 to start the instrument key processing routine shown in FIG.
Proceed to b1. First, in step Sb1, it is determined whether or not there is a key-on event, that is, whether there is an operated instrument key 4b. Here, for example, when there is the operated instrument key 4b, the determination result is "YES", and the process proceeds to the next step Sb2. In step Sb2,
Converts to the note number of the assigned instrument sound corresponding to the operated key number. In this conversion, R
A note number conversion table stored in a predetermined area of OM2 is used. The note number conversion table is a table in which a predetermined note number is associated with the key detection signal Ks described above. Next, in step Sb3, this note number and note-on indicating the start of sounding are supplied to the tone generator circuit 10. As a result, a rhythm sound is formed by the tone color of the musical instrument sound corresponding to the operated key, and this routine is ended. On the other hand, the above step S
If there is no operated instrument key 4b in b1, the determination result is "NO", and this routine ends.

Wheel processing routine After the instrument key processing routine is executed, the CPU
The process of 1 proceeds to step Sa3. As a result, the wheel processing routine shown in FIG. 5 is started and the routine proceeds to step Sc1 of the routine. First, in step Sc1, the wheel data Dh output by the wheel detection circuit 9 is fetched and written in the register WHEDT1. Next, at step Sc2, it is determined whether or not the data written in the register WHEDT1 is the same as the data written in the register WHEDT2 described later. here,
The previously fetched wheel data is written in the register WHEDT2. The contents of the register WHEDT2 and the contents of the register WHEDT1 are compared to determine whether or not there is a change between the previously fetched wheel data. That is, it is determined whether or not the wheel 4a has been operated. If the contents of these registers are not the same, it is determined that the wheel 4a has been operated, and the result of this determination is "YES", and the routine proceeds to the next Step Sc3.

At step Sc3, the register WHASN
The process branches according to the data written in. here,
The register WHASN is the option selector 4 described above.
It is a register in which the values of "0" to "4" are written according to the setting position of c-1. That is, in this step Sc3, the rhythm sound is modified by the control parameter assigned by the option selector 4c-1, so that the process branches to each process. Each processing content will be described below.

A. When the value of the register WHASN is "0" In this case, the above-mentioned register WHEDT1 value is converted into pitch bend data by the pitch bend table stored in the ROM2. What is this pitch bend data?
This is data for controlling the pitch of a musical sound. Then, in step Sc5, the pitch bend data is supplied to the tone generator circuit 10. As a result, the pitch of the rhythm sound is changed by the wheel 4a.
Is controlled in accordance with the operation amount of, and, for example, when the wheel 4a is operated to the "+" side, the pitch is increased.

B. When the value of the register WHASN is "1" In this case, the process proceeds to step Sc6 and the above-mentioned register WH is read by the accent table stored in the ROM2.
Convert the EDT1 value into accent data. Then, in step Sc7, this accent data is transmitted to the tone generator circuit 1.
Supply to 0. As a result, the volume of the rhythm sound is controlled according to the operation amount of the wheel 4a.
When a is operated to the "+" side, the volume is increased.

C. When the value of the register WHASN is "2" In this case, the process proceeds to step Sc8, and the register W described above is read by the filter coefficient table stored in the ROM2.
The HEDT1 value is converted into filter coefficient data. Then, in step Sc7, the filter coefficient data is supplied to the tone generator circuit 10. As a result, the filter characteristic of the tone generator circuit 10 is changed, and the frequency component of the rhythm sound is changed by the wheel 4
It is controlled according to the operation amount of a. For example, the wheel 4
When a is operated to the “+” side, the filter of the tone generator circuit 10 has a high-pass characteristic, and the low frequency component of the rhythm sound is cut.

D. When the value of the register WHASN is "3" In this case, the process proceeds to step Sc10, and the above-mentioned register WHED is read by the pan table stored in the ROM2.
Convert T1 value to pan data. This pan data is
It is data for displacing the stereo sound field to the left and right when the musical sound signal forms the stereo sound field. Then, in step Sc11, the pan data is supplied to the tone generator circuit 10. As a result, the sound field of the rhythm sound currently generated is displaced according to the operation amount of the wheel 4a, and for example, when the wheel 4a is operated to the "+" side, the sound field is displaced to the right. ..

E. When the value of the register WHASN is "4" In this case, the process proceeds to step Sc12 and the above-mentioned register WH is read by the decay table stored in the ROM2.
Convert EDT1 value to decay data. The decay data is data for controlling the falling waveform in the amplitude envelope of the tone signal, that is, the reverberation (continuous tone) of the generated tone. Then, in step Sc7, this decay data is supplied to the tone generator circuit 10. As a result, the sustained sound portion of the rhythm sound is controlled according to the operation amount of the wheel 4a. Done. Next, when any one of the above-described processes is completed, or when the determination result of the above-mentioned step Sc2 is "NO", the process proceeds to step Sc14 and the value of the above-mentioned register WHEDT1 is set to the register WHEDT2.
Write to. This completes the wheel processing routine and returns to the main routine.

As described above, when the instrument key 4b is operated during real-time performance, the instrument key processing routine is executed. For example, when the key 1 of the instrument keys 4b is operated, it is assigned to the key 1. A snare drum rhythm sound is formed. Then, in the wheel processing routine, when the option selector 4c-1 is set to control the pitch, the pitch of this snare drum sound is controlled according to the operation of the wheel 4a.
For example, when the operation position of the wheel 4a is "+10", the pitch is pronounced 10 cents higher than the normal pitch. As a result, the control parameter, which has been fixed in the past, is continuously changed, so that a play rich in expression can be performed.

Incidentally, the wheel 4 in the above-mentioned embodiment.
Instead of a, the same control may be performed using an operator such as a joystick or a slider, or an operator of the type that directly generates a digital value may be used. In the above embodiment, the tone generator circuit 10 is set by software.
However, instead of this, the control can be realized by hardware. Furthermore, although the above-mentioned embodiment assumes the sound source control at the time of real-time performance, this can also be applied to the pattern input at the time of creating a rhythm pattern used for automatic performance. The various control parameters assigned to the wheel 4a described above are not limited to these,
For example, parameters that give various effects such as reverb and crossfade can be assigned.

[0018]

As described above, according to the present invention, the instruction means for changing the parameter generated by the parameter generation control means in accordance with the operation amount of the operator and for causing the tone forming means to instruct the rhythm sound to be produced. In accordance with the output of the above, the rhythm sound is formed and the rhythm sound is modified in accordance with the parameter generation control means. Therefore, the modification range of the rhythm sound can be widened and a play with rich expression can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment according to the present invention.

FIG. 2 is a diagram showing a panel layout of the electronic musical instrument according to the embodiment.

FIG. 3 is a flowchart showing a main routine in the embodiment.

FIG. 4 is a flowchart showing an instrument key processing routine in the embodiment.

FIG. 5 is a flowchart showing a wheel processing routine in the embodiment.

[Explanation of symbols]

1 CPU, 2 ROM, 3 RAM, 4a wheel, 4b instrument key, 8 key detection circuit, 9 wheel detection circuit, 10 sound source circuit.

Claims (1)

[Claims] 1. An operator for generating operation information, an instruction means for instructing generation of a predetermined rhythm sound according to a performance operation, and a parameter for modifying the rhythm sound according to an operation amount of the operator. And a musical tone forming unit that forms the rhythm sound according to the output of the instruction unit and that modifies the rhythm sound according to the parameter generated by the parameter generation control unit. An electronic musical instrument.