JP3363962B2 - Electronic musical instrument - Google Patents

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 automatic range setting when the keyboard is divided and used.

[0002]

2. Description of the Related Art In some conventional electronic musical instruments, a low-pitched keyboard for one octave, for example, is used not for playing but for detecting chords, for accompaniment by chords. In such a case, a sound in the range corresponding to the keyboard used for chord detection could not be generated.

[0003]

In the conventional electronic musical instrument as defined above which INVENTION SUMMARY it is], in the case of using the performance for the binary other applications and the keyboard <br/> split was used for applications other than playing It becomes impossible to generate musical tones with the pitch originally assigned to the keyboard of the range . To this end, particularly in the small musical instrument in the number of key keyboard, the less pitch of the keyboard for playing, especially selection
For some sounds that are, used frequently played at the tone, the optimum range is not covered in the timbre, not self
Natural musical tone only there is a problem that that such can not be generated.

The object of the present invention is to improve the problems of the prior art as described above, and even when the keyboard is divided into a plurality of musical ranges and a part of the keyboard is used for purposes other than playing, it remains for playing. A keyboard with a wide range of pitches, with a pitch range that is optimal for the selected tone.
An object is to provide an electronic musical instrument capable of generating sound .

[0005]

The present invention is directed to a plurality of areas.
An electronic musical instrument having a keyboard means that can be divided and a keyboard utilizing means that uses the keyboard of the divided planned area for purposes other than playing, and the pitch of the musical tone generated in response to the key depression of the playing purpose key , From the pitch originally assigned to the key to the pitch correction means for correcting the designated pitch correction amount and the selected tone color corresponding to the keyboard utilizing means to be used.
And a control means for instructing the pitch correction means to determine a pitch correction amount in accordance with the pitch correction quantity.

[0006]

According to the present invention, even if an arbitrary number of keyboard utilizing means are used for playing the keyboard for purposes other than playing, the remaining tone range of the keyboard is optimally used for playing. It is possible to automatically set the range, and it is possible to generate sounds in the range that could not be played in the past.

[0007]

Embodiments of the electronic musical instrument to which the present invention is applied will be described in detail below. FIG. 1 is a functional block diagram showing functions related to the present invention. The keyboard means 20 is composed of a plurality of keys, generates performance information including pitch information ,
Input to the high correction means 30 . The pitch correction means 30 corrects the pitch information in the performance information input from the keyboard means by the pitch correction amount instructed by the control means 80 and outputs it to the musical tone generation means 40. The tone generating means 40 generates a tone based on the corrected pitch information. The tone color setting means 50 outputs the selected tone color information to the control means 80. The plurality of keyboard utilization means 60 and 70 are provided for the divided areas (ranges) of the keyboard , such as chord detection and automatic accompaniment melody selection .
It is a means for using a part of the keyboard for purposes other than performance, and generates usage setting information indicating whether or not each divided keyboard area is set to be usable for purposes other than performance. <br /> Output to the control means 80.

The control means 80 inputs the tone color information from the tone color setting means 50, obtains the pitch correction amount by the tone color, and
By recognizing whether or not each keyboard utilizing means is set, the pitch correction amount corresponding to the keyboard utilizing means which is set to be available is obtained, and finally all the pitch correction amounts are added to the pitch correcting means 30. Output to. With the functions as described above, the present invention always sets the optimum pitch range automatically regardless of how the keyboard is divided and used, and the operability is improved.

FIG. 2 is a block diagram showing the configuration of an electronic musical instrument to which the present invention is applied. The CPU 1 controls the entire electronic musical instrument according to a program stored in the ROM 2. The CPU 1 also includes a timer interrupt circuit (not shown). In addition to the control program, the ROM 2 stores various tables, music data for automatic performance, various tone color data, and the like. The RAM 3 is used as a work area of the CPU 1 and stores various control data such as a key assignment table and a sound source control information table, and may be backed up by a battery.

The MIDI interface 4 is an external MI.
Connect to DI equipment. The bus 5 connects each circuit in the electronic musical instrument. The switches 6 are various switches such as selection switches for tone colors and rhythm patterns on the panel, numeric keypad switches for inputting numerical values, and the like. L on the panel
The ED display device 7 is composed of, for example, LEDs provided for a plurality of function selection switches. The panel interface 8 includes a scan circuit for reading switch information into the CPU 1 and a drive circuit for driving the display device.

The keyboard 9 comprises, for example, a plurality of keys each having two switches, and a keyboard interface 10
Scans the switch of each key under the control of the CPU 1. The tone generator circuit 11 is capable of generating, for example, 16-channel independent digital tone signals by time division multiplexing processing under the control of the CPU 1. The waveform memory 12 is a memory for storing musical tone waveform information corresponding to various tones including percussion instruments. The D / A converter 13 performs digital / analog conversion on the digital signal output from the tone generator circuit 11. The amplifier 14 amplifies the analog tone signal,
It is sounded from the speaker 15.

Next, the details of the processing of the CPU will be described.
FIG. 3 is a flowchart showing the main processing of the CPU 1. When the power of the electronic musical instrument is turned on, in step S1, various hardware such as a CPU and a sound source LSI,
Alternatively, the data in the RAM is initialized. In step S2, the switch on the panel is scanned, the switch state information is fetched, it is checked whether or not there is a change in the switch state, and if there is a change, switch processing is performed. In step S3, it is checked whether or not there is a change in the state of the keyboard (ON or OFF), and if there is a change, a corresponding process (so-called key assign process) is performed. The process of step S3 will be described later. In step S4, the performance information is transmitted to the external device by the MIDI signal, or the MI from the external device is transmitted.
DI signal reception processing is performed. In step S5, if the data to be automatically played is set, the automatic performance process is performed. In step S6, other processing such as effect addition processing is performed, and after step S6 ends, the processing returns to step S2, and the processing is repeated.

FIG. 4 is a flow chart showing details of the keyboard event process in step S3 of FIG. Step S1
At 0, the keyboard is scanned to see if there are any keys whose state has changed to key-on. When there is no key-on changed key, the process proceeds to step S11, and in step S11, it is checked whether or not there is a key-key changed key-off. If there is a change to key-off in step S11, the process proceeds to step S12, and a process related to key-off is performed.

If there is a key changed to key-on in step S10, the process proceeds to step S13, and in step S13, a change width (pitch correction value) is read from the pitch change table 1 for each tone color. FIG. 5 is an explanatory diagram showing an example of a pitch change table for each timbre. In the figure, "-12" is assigned to the timbres 32 to 39 and 43.
The pitch correction value is stored. Although not shown, "0" is stored in the remaining blank portion.
In the electronic musical instrument of the embodiment, for example, when the tone color number 32 is selected, the pitch correction value "-12" is read from this table, and the correction value -12 is added to the key number of the performance information input from the keyboard. To be done. Key number 12
Means a pitch difference of one octave. Therefore, when the tone color numbers 32 to 39 and 43 are selected, the pitch of the key is automatically lowered by one octave as compared with the case of selecting the other tone colors.

In step S14, whether or not the low-frequency keyboard as shown in FIG. 7, for example, is being used for detecting chords is checked by looking at, for example, a flag indicating the state of use, and other than the performance. If it is used for the purpose, the process proceeds to step S15. In step S15, as shown in FIG. 6, from the pitch change table 2 corresponding to the function used or the keyboard width used,
The change width is read out and added to the correction value of table 1 obtained in step S13.

In step S16, it is checked by looking at, for example, the flag whether or not the keyboard in the middle range as shown in FIG. 7 is used, for example, for automatic accompaniment melody selection. If it is used for, the process proceeds to step S17. In step S17, the range of change is read from the pitch change table 3 (not shown) corresponding to the function used or the keyboard width used, and added to the correction values of the tables 1 and 2 obtained in step S15. .

In step S18, the obtained correction value is added to the key number information in the key-on information.
For example, when the tone color number 32 is selected, the low frequency range of the keyboard of FIG. 7 is used for chord detection, and the middle frequency range is used for automatic performance melody selection, “-12” in Table 1 and Table 2 Assuming that the correction value of "-12" is read out in Table 3 (not shown), the total of the correction values is -36.
Therefore, the pitch of the keyboard above the midrange is lowered by 3 octaves. In step S19, well-known key assignment processing and sound generation control processing are performed. By the above processing, when a part of the keyboard is used for purposes other than playing, the pitch of the remaining part of the keyboard can be automatically corrected to an optimum value.

Although the embodiment has been described above, the following modifications are also possible. As the pitch change table, an example in which a table corresponding to each specific use of the keyboard is provided has been described.
For example, a table corresponding to each keyboard range (for example, 1 octave or 2 octaves) used for other than playing may be provided separately for the low frequency side and the high frequency side. If the correction value of each table is fixed (for example, 1 octave), only the 1-bit flag indicating the presence or absence of the correction is stored in each table, not the actual correction value. If the flag is set, the predetermined value is stored. May be added, or the correction value may be expressed in units of octaves. Further, the values in the table may be preset from the panel.

If the keyboard is used for a specific purpose other than playing, and if it is moved up or down an octave uniformly regardless of the timbre, no table is necessary. In step S17 or the like, a predetermined correction value is set. All you have to do is add. In the processing of FIG. 4, the method of calculating the pitch correction value for each key-on is shown. For example, when the use of each keyboard utilizing means is set, the total of the pitch correction values is calculated and stored. The total value may be added when the key is turned on.

[0020]

As described above, according to the present invention, even when an arbitrary number of keyboard utilizing means are used for purposes other than playing a keyboard, for example, the sound range of the remaining keyboard is used for playing. It is possible to automatically set the optimum range, and it is possible to generate sounds in the range that could not be played conventionally.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing functions related to the present invention.

FIG. 2 is a block diagram showing a configuration of an electronic musical instrument.

FIG. 3 is a flowchart showing a main process of a CPU.

FIG. 4 is a flowchart showing keyboard event processing.

5 is an explanatory diagram showing the contents of the pitch change table 1. FIG.

FIG. 6 is an explanatory diagram showing the contents of a pitch change table 2.

FIG. 7 is a front view showing a division range of a keyboard.

[Explanation of symbols]

1 ... CPU, 2 ... ROM, 3 ... RAM, 4 ... MIDI interface, 5 ... Bus, 6 ... Switch, 7 ... Display device, 8 ... Panel interface, 9 ... Keyboard, 10 ... Keyboard interface, 11 ... Sound source circuit, 12 ... Waveform memory, 13 ... D / A converter, 14 ... Amplifier, 15 ... Speaker

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G10H 1/00 G10H 1/18 G10H 1/20

Claims (2)

(57) [Claims] A keyboard means according to claim 1] may be divided into a plurality of regions, partial
In the electronic musical instrument with a keyboard use means to use the split has been planned area of the keyboard in applications other than playing, the pitch of the musical tone to be generated in response to the key-depression of key performance applications,
The pitch correction means for correcting the pitch originally assigned to the key by the instructed pitch correction amount, and the selected pitch corresponding to the keyboard usage means to be used.
An electronic musical instrument comprising: a control unit that instructs a pitch correction unit to determine a pitch correction amount that is determined according to a color . 2. A plurality of keyboard utilizing means are provided, and the control means adds pitch correction amounts corresponding to the respective keyboard utilizing means used at the same time and outputs them to the pitch correcting means. The electronic musical instrument according to claim 1.