JPH04247495A - Chord processing device - Google Patents

Abstract

PURPOSE:To simplify a chord input by performing the chord input through the use of ten key and/or a single key of a keyboard. CONSTITUTION:The numerical data inputted and the chord route and the chord type corresponding to key numbers are read out from a chord memory 16 (steps 44 and 46) and are outputted as a chord data. Furthermore, not only the chord, which is being played (steps 44 and 46), but also the next chord is read out (step 58) and displayed (step 60).

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chord processing device, and more particularly to an improvement in chord performance or chord input operations.

0002

2. Description of the Related Art Conventionally, various electronic musical instruments have been designed to simplify chord performance. One of these is automatic chord form performance. With this automatic chord form performance, while running automatic rhythm performance, by holding down or pressing once the key of the constituent note of the chord to be played on the accompaniment keyboard part of the keyboard, the chord performance will be repeated automatically. It is something.

Another method is one-finger chord performance. This one-finger chord performance can be performed by continuing to turn on any key on the accompaniment part of the keyboard while running the automatic rhythm performance.
When turned on, a chord type such as major, which uses this on key as the chord root, will automatically be played repeatedly. If you keep one more arbitrary key on at the same time or turn it on once, the chord type changes to minor, and if you keep one more arbitrary key on at the same time or turn it on once, the chord type changes to 7th, and so on. Then, the chord type changes depending on the number of keys pressed.

0004

[Problems to be Solved by the Invention] In the automatic chord form performance described above, it is only necessary to press the keys of the constituent notes of the chord, which makes chord playing or chord input operations easier. It was difficult to use my fingers because I had to operate the keys. In addition, the above-mentioned one-finger chord performance makes fingering easier, but
The number of chord types that could be played could not exceed the number of fingers, and at most five chord types could be played.

The present invention has been made to solve the above-mentioned problems, and provides a chord processing device that greatly facilitates chord playing or chord input operations and can play a wide variety of chord types. The purpose is to

[0006]

Means for Solving the Problems and Operations In order to achieve the above object, the present invention is such that a chord type or chord root is input by means for inputting character data such as a numeric keypad. This makes it easier to input codes and eliminates the need for difficult fingering.

Further, according to the present invention, a chord type is input using at least one of the pitch input means for a plurality of pitches, and a chord root is input using at least one of the other pitch input means. This makes it easy to play chords and allows you to play a wide variety of chord types.

Furthermore, the present invention is arranged to display not only the chord type and chord root currently being played, but also the chord type and chord root to be played next. As a result, the content of the chord to be played next can be known in advance, and the chord performance can be performed smoothly.

[0009]

[Example] 1. Overall circuit diagram 2 shows the overall circuit of the electronic musical instrument. keyboard 1
Each key is scanned by the key scan circuit 2, data indicating key-on and key-off is detected, and the CPU
5 to the working RAM 6. The data is then compared with data indicating the on/off state of each key that has been stored in the working RAM 6 up to that point, and the CPU 5 determines whether each key has an on event or an off event. Note that the keyboard 1 is an electronic stringed instrument,
Electronic wind (wind) instruments, electronic percussion instruments (pads, etc.), computer keyboards, etc. may be used instead.

Each key of the panel switch group 3 is scanned by a panel scan circuit 4. This scan detects data indicating whether each key is on or off,
It is written into the working RAM 6 by the CPU 5. Then, it is compared with the data indicating the on/off state of each key stored in the working RAM 6, and the CPU 5 determines whether each key is on or off.
carried out by. The above-mentioned data and various processing data stored in the working RAM 6 are sent to an LCD (liquid crystal display) 7 or an LED (light emitting diode) 8, and a display is performed according to the data contents.

[0011] The pattern ROM 9 stores in advance sequence information for a plurality of songs, such as rhythm, bass, backing, arpeggio, chord, melody, etc. for automatic performance. Further, the ROM/RAM card 12 is a card having a built-in ROM or RAM, and stores the above-mentioned sequence information, waveform data, etc. Data R
Sequence information is also stored in AM10, and this sequence information is stored in pattern ROM9 or ROM/RA.
In addition to what is transferred from the M card 12, the data includes data that has been rewritten and arranged from the transferred data, data newly created by the performer, and the like. Sequence performance processing in step 05, which will be described later, is performed based on the sequence information stored in the pattern ROM 9, data RAM 10, or ROM/RAM card 12.

The program ROM 11 stores programs for the CPU 5 to perform various processes. This program ROM 11 further includes a code decoder and a code memory 16, and also stores other information. When the code decoder is given code data indicating the chord type and chord root, it reads out data corresponding to the key number data of each constituent note of the chord. As shown in FIG. 1, the code memory 16 reads out the chord type or chord root of the corresponding chord when numerical data or key number data is given.

The sound system 13 generates musical tone signals corresponding to pitches corresponding to on-keys of the keyboard 1, velocities of key-on or key-off, tones corresponding to on-switches of the panel switch group 3, and the like. Here, velocity is data indicating the speed or strength of the sound-producing operation of each key on the keyboard 1. In this sound system 13, a musical tone generation system for a plurality of channels, for example, 16 channels, is formed by time-sharing processing, and musical tones can be generated polyphonically. Data regarding musical tones assigned to each channel is stored in an assignment memory (not shown).

The sound system 13 reads out various waveform data from the waveform ROM 14. This waveform data corresponds to the pitch, velocity, and timbre. The midi interface 15 is an interface for transmitting and receiving musical tone data to and from an externally connected electronic musical instrument. This musical sound data is MID
It is based on the I (musical instrument digital interface) standard, and sounds are also produced based on this musical tone data.

2. Code Memory 16 FIG. 1 shows the code memory 16 formed within the program ROM 11. This code memory 16
When two-digit numerical data is given, code data indicating the chord root and chord type corresponding to this numerical data is read out. In this case, the numbers "00" to "11"
” corresponds to both chord root and chord type, but this corresponds to keys 21 to 34 and volumes 35 to 35.
Either one is selected by switching the mode by operating 38. Of course, the code type can be specified using the numerical value "2", for example.
0" to "65" so that both do not overlap. Further, the above-mentioned numerical data is input from the numeric keypad 32 of the panel switch group 3, which will be described below, but may also be input from an externally connected electronic musical instrument through the MIDI interface 15.

The code memory 16 stores pitches C1 to A5.
Even if key number data is given, code data indicating the chord root and chord type corresponding to this key number data is read out. In this case, the key number data for pitches C1 to B1 are duplicated for both the chord root and chord type, and keys 21 to 34 and volumes 35 to 38 are used.
Either one may be selected by switching the mode by operating . Furthermore, although the key number is input from an externally connected electronic musical instrument through the MIDI interface 15, it may also be input from the keyboard 1. In this case, in order to distinguish it from normal key number data, a specific midi channel is used for midi data, or keys 21 to 21 on keyboard 1 are used.
34 and volumes 35 to 38 to switch the mode.

3. Panel Switch Group 3 FIG. 3 shows the panel switch group 3, the LCD 7, and the LED 8. Panel switch group 3 includes overdrive key (OVERDRIVE) 21 and base key (BASS).
22, chord key (CHORD) 23, tempo key (T
EMPO) 24, - key 25a, + key 25b, start/stop key (START/STOP) 26, fill in/continue key (FILL IN/CO)
NT) 27, Intro/Ending key (INTRO)
/ENDING) 28, edit key (EDIT) 2
9, Card key (CARD) 30, Demo key (DEMO)
) 31, "0-9" numeric keypad 32, special key (
SPECIAL) 33, enter key (ENTER) 3
4 and four volumes 35, 36, 37, 38, etc.

The overdrive key 21 is a key for switching on/off the overdrive of the connected electronic musical instrument. Overdrive is a musical effect that generates clipping distortion that clips the peaks of a musical sound waveform. The bass key 22 is a key for adjusting the volume of the bass part of the performance. code key 23
is a key that adjusts the volume of the chord part and backing part of the performance. The tempo key 24 is a key for displaying the value of the set tempo.

The - key 25a and the + key 25b transpose the entire range of the keyboard 1 in semitone units, and also transpose the LC
You can move the display cursor on D7 or select ``YES'' in various processes.
This key instructs the functions of "(execute)" and "NO (not execute)." The start/stop key 26 is a key for starting and stopping automatic performance based on sequence information. Fill-in/Continue key 27
is a key that allows you to change the bass or chord by a short phrase during a performance, or to continue and restart automatic performance when the performance is stopped. The intro/ending key 28 is a key for playing the intro phrase of a song at the start of the performance, and for playing the ending phrase of the song at the end of the performance. The edit key 29 is a key for specifying an edit mode for inputting or modifying sequence information for automatic performance.

[0020] The card key 30 is the above-mentioned ROM/RAM.
This is a key that specifies access to the card 12. The demo key 31 is a key for specifying demo performance. Numeric keypad 3
2 is a key for inputting various data such as selection of song number of sequence information for a plurality of songs, chord type, tone color type, and various command values. The special key 33 is a key that is operated in combination with the numeric keypad 32 to specify or cancel various modes. The enter key 34 is a key for instructing processing of input data or commands. Volumes 35 to 38 are used to set the volume of the rhythm sound, the volume of the connected electronic musical instrument, the depth of the overdrive, and the tempo value.

By operating the numeric keypad 32, sequence information for 10 songs from "90" to "99", which will be described later, is selected, and further by operating the edit key 29, other keys 21 to 34, or volumes 35 to 38. This sets an edit mode for inputting or modifying the chord root and chord type of the sequence information. In this mode, as shown in FIG. 12(6), a code is input at the location where the code changes. The example in Figure 12 (6) is the 00th step ("00") of the first beat ("1") of the second measure ("002"), and the playing chord is Adi.
(A diminished). The number of steps is one beat divided into 48 equal steps.

[0022] The number of measures, beats, and steps are as follows -
It is set by moving the cursor using the key 25a and + key 25b and inputting a desired value using the numeric keypad 32. The chord root and chord type are also set by moving the cursor using the - key 25a and + key 25b and inputting desired data using the numeric keypad 32. This data is as shown in FIG. In this case, it is also possible to input using the keyboard 1.

By pressing the special key 33 and the numeric keypad 32 at the same time, the monocode mode is set.
This mode is canceled by turning on only the special key 33. This monochord mode is a mode in which only one chord is played automatically and the chord does not change midway. However, when key number data is input through the MIDI interface 15, the code is changed to correspond to this key number data. This change may be a code corresponding to key number data input from the keyboard 1 or a code corresponding to numerical data input from the numeric keypad 32. Note that even in manual performance, the chord performance may be performed by inputting a chord from the numeric keypad 32 or key code 1.

[0024] The above special key 33 and another numeric keypad 3
By pressing 2 at the same time, midi mode is set.
This mode is canceled by turning on only the special key 33. In this midi mode, a reception channel number, etc. for receiving musical tone data such as key number data through the midi interface 15 is set. Key number data received on a channel one number lower than this receiving channel is converted into a code by the code memory 16 described above.

[0025]On the LCD 7, input data or input commands corresponding to the operation keys are switched and displayed only for a certain period of time after the operation of each of the keys 21-34 and the volumes 35-38. The current chord and the next chord are displayed on the LCD 7 during automatic performance. The LED 8 blinks at a speed corresponding to the set tempo. In addition, although not shown, a slot into which the ROM/RAM card 12 is inserted, a connector for the midi interface 15, etc. are also provided.

4. Data RAM 10 FIG. 4 shows the data RAM 10. This data RAM 10 contains song numbers “90” to “99”.
Sequence information for the previous 10 songs is stored. This sequence information is the chord progression data of the rhythm part and chord part, but it also includes the melody, bass, backing,
It is also possible to memorize parts such as arpeggios. Further, the song numbers are not limited to "90" to "99", and the number of songs is not limited to 10. In addition, the song number “
Sequence information from ``0'' to ``89'' is stored in the pattern ROM 9 and ROM/RAM card 12 described above, and this sequence information is directly converted to the song number ``90.''
It is possible to create sequence information with song numbers "90" through "99" or by modifying and arranging the song numbers. Furthermore, the sequence information newly input by the performer can be set to song numbers "90" to "99".

This sequence information consists of a code data group consisting of code data and step time data, bar mark data, special commands such as a return command, and the like. The chord data is data indicating a chord type and a chord root, and musical tone data of the constituent notes of this chord are set in an assignment memory (not shown) to generate musical tones. The step time data is data indicating the time from the beginning of a song or the beginning of a measure, ie, bar mark data, to the start of sound generation or command execution according to chord data. For this step time data, a sequence clock counter 66 (described later)
When the values match, a musical tone is produced or a command is executed according to the code data. This sequence clock counter 66 is incremented at a speed according to the set tempo, and is cleared every time it counts one bar. The bar mark data is data indicating the break between each bar.

Furthermore, index data is stored at the beginning of the sequence information, and this index data consists of rhythm number data, song name data, beat data, tempo data, and the like. The rhythm number data indicates the number data of the rhythm pattern stored in the pattern ROM 9, and this rhythm pattern is played automatically based on this sequence information. The time signature and tempo data are data indicating the time signature and tempo of automatic performance based on this sequence information. This time signature data is stored in the maximum beat number register 51 as the maximum number of beats, and the tempo data is stored in the tempo data register 46. Note that the index data may also include transpose data, and this transpose data is stored in the transpose data register 4.
5 is stored.

The return command is a command for returning to the beginning of the song and repeating the song. Special commands include return commands, stop commands, ending commands, part on/off commands, variation change commands, chain song commands, and fill-in commands. The stop command is a command for immediately ending automatic performance. The ending command is used to end automatic performance.
This is a command for playing the ending pattern stored in the pattern ROM 9 and ending the automatic performance. The part on/off command is a command for masking or unmasking the pronunciation of each performance part such as melody, rhythm, bass, drum, hat, piano, violin, flute, etc., which will be described later. The variation change command and chain song command are commands for changing the sequence information being read to other sequence information. The fill-in command is a command for performing one to several phrases of fill-in performance.

[0030] The code data of the above sequence information may be replaced with note data consisting of key number data, velocity data, part data, gate time data, step time data, etc., or beat data consisting of velocity data, step time data, etc. good. Furthermore, the step time data may be omitted from the sequence information.

[0031] Here, the part data includes melody, chord, rhythm, bass, backing, arpeggio, drum,
This is data indicating performance parts such as hat, piano, violin, flute, etc. The tone number data is data indicating a timbre, and is set in a tone number data register 47 of the working RAM 6, which will be described later, during automatic performance. Gate time data is data indicating the time from the start of sound generation to the end of sound generation. The gate time data is provided by a sequence clock counter 66, which will be described later.
When is incremented, it is decremented and '
When it reaches "0", the sound is muted.

[0032] Also, the above sequence information is 4 per beat.
It may be made up of a group of step areas for eight steps, and chord data may be stored in the step area where a chord is sounded or changed among each step area. In this case, each step area is 1/4 regardless of the presence or absence of data.
It is read out every 8 beats. Note that the above-mentioned special command may be stored in such sequence information.

5. Working RAM 6 FIG. 5 shows a part of the working RAM 6. As shown in FIG. This working RAM 6 includes a write protect flag register 41, a mode flag register 42, an effect flag register 43, an overdrive data register 44, a transpose data register 45, a tempo data register 46, a tone number data register 47...
midi channel register 48, LED counter 50,
Maximum beat number register 51, LCD constant display register 6
1, an LCD temporary display register 62, a display timer register 63, a tempo counter 65, a sequence clock counter 66, a bar counter 67, etc. are formed.

The write protect flag register 41 is a 10-bit register, and each bit area has the above-mentioned 1 bit area.
A write protect flag corresponding to sequence information of song 0 is stored. When this write protect flag is "1", rewriting of the sequence information is protected, and when it is "0", rewriting protection is canceled. This 1/0 may have an opposite characteristic.

A flag is set in the mode flag register 42 when various modes are set, for example, when the above-mentioned edit mode, monochord mode, midi mode, etc. are set. Other mode flags are also set in this register 42. Effect flag register 4
3, respective bits are set when various effects such as overdrive set by the overdrive key 21 are set.

The overdrive data register 44 includes:
Data indicating the depth of overdrive input by the volume 37 is set. The transpose data register 45 includes the - key 25a and the + key 25.
The transpose data input by b is set. Data indicating the tempo value input by the volume 38 is set in the tempo data register 46. The tempo data register 46 also stores decoded tempo data obtained by converting the tempo data into a value that is, for example, 1/216 of the time length of 1/48 of one beat.

[0037] The tone number data register 47...
Tone number data indicating the timbre of the performance musical tone during automatic performance and part data indicating performance parts such as melody, chord, rhythm, etc. are set. This tone number data is transferred to the assignment memory along with other data at each sound generation timing.

The midi channel register 48 stores the reception channel number n of midi data input through the midi interface 15. A musical tone is generated according to the key number data etc. received on this receiving channel, and the key number data received on a channel one number lower than this receiving channel is converted into a code by the code memory 16 mentioned above. Ru. The LED counter 50 is a counter for counting the lighting time of the LED 8. The maximum beat number register 51 is set with time signature data of sequence information to be automatically performed. This time signature data may be a value multiplied by 48.

The LCD constant display register 61 contains the above L
Constant display data that is constantly displayed on CD7 is stored. Temporary display data temporarily displayed on the LCD 7 is stored in the LCD temporary display register 62. These registers 61 and 62 have storage areas for characters displayed on the LCD 7. For temporary display data, press each key 2 above.
1 to 34 and display data of input commands corresponding to the operations of volumes 35 to 38, and are displayed for a certain period of time, for example, 5 seconds after this operation, after which the above-mentioned constant display data is displayed. The display timer register 63 is
This register is used to time count the display time of temporary display data.

The decoded tempo data in the tempo data register 46 is accumulated in the tempo counter 65 at regular intervals, and when the value exceeds 1/48 beat, that is, 216, and the value exceeds 216, the sequence clock counter 65 accumulates the decoded tempo data in the tempo data register 46.
6 is increased by +1. At this time, sequence performance processing is executed. When the sequence clock counter 66 exceeds a value that is 48 times the maximum beat number data, it means that the time length of one bar has been counted, and the bar counter 67 is incremented by one. In addition, the working RAM 6 also stores the rhythm number data, the song number of the sequence information currently being automatically played, and the like.

6. Main Routine FIG. 6 shows a flowchart of the main routine. This process starts when the power is turned on. In this process, the CPU 5 first performs an initialization process such as clearing the working RAM 6 (step 01), and then presses each key 21 to 34 of the panel switch group 3, the volume 35 to
If there are 38 on or off events (step 02), each key 21-34, volume 35-38
Panel switch processing is performed according to the input data or input command (step 03). If the tempo counter 65 has overflowed (step 04), sequence performance processing is performed (step 05). Next, it is determined whether or not midi data has been received and stored in the midi I/O 15 (step 06), and if it has been received and stored, processing according to this midi data is performed (step 07). Further, if there is a key-on event or a key-off event on the keyboard 1 (step 08), key processing corresponding to this event is performed (step 09).

7. Panel Switch Processing FIG. 7 shows a flowchart of the panel switch processing in step 03 above. In this process, if the event key is the edit key 29 (step 11), the CPU 5 switches the edit mode flag of the mode flag register 42 from 1/0 (step 12), and performs other key processing (step 13). Other key processing includes the above-mentioned setting and cancellation of the monochord mode, setting of the midi reception channel, and the like.

If the event key is the numeric keypad 32 (step 14), it is determined whether the edit mode flag is set (step 15). If the edit mode flag is set, it is determined whether a chord root is being input (step 16). This determination is made based on data in a cursor display register (not shown) in the working RAM 6. This cursor display register is a register that indicates in which of the display areas for 16 characters in the LCD 7 the cursor is to be displayed. If the value of this register is at the code root position of the 12th digit out of all 16 digits as shown in Figure 12 (6), it is determined that the code root is being input, and the code type from the 13th digit onward is determined. If it is in the position, it is determined that the code type input state is present.

If the code route is being input (step 16), it is determined whether the input numerical data of the numeric keypad 32 is the first digit (step 17). If it is the first digit, the numerical data of the first digit is temporarily saved in an input buffer register (not shown) or the like (step 18). If it is the 2nd digit numerical data, call the 1st digit numerical data above (
Step 19), the code root data corresponding to both numerical data are read from the code memory 16 of the pattern ROM 9, and written into an edit register (not shown) (Step 20).

Further, if the code type input state is entered (step 21), the input numerical data of the numeric keypad 32 is 1.
It is determined whether it is the digit or not (step 22). If it is the first digit, the numerical data of the first digit is temporarily saved in an input buffer register (not shown) or the like (step 23). If it is the second digit numerical data, the first digit numerical data is called (step 24), the code type data corresponding to both numerical data are read from the code memory 16 of the pattern ROM 9, and the edit register (not shown) is read. (Step 25).

If it is not the chord root input state or chord type input state (step 26), other data, such as measure number data, beat number data, and step number data, are stored in another edit register (not shown) according to the cursor position. ) (step 27). In this edit mode, if the enter key 34 is operated (
Steps 28, 29), the code data in the edit register is transferred to an address in the sequence information area of the decrement RAM 10 corresponding to the bar number data, etc. of another edit register (step 30). If it is not in the edit mode at step 29, enter processing for other data is performed (step 31). If the edit mode flag is cleared in step 15 above, data input using the numeric keypad 32 is set according to the mode at that time (step 32).

In this way, the chord root or chord type can be easily input using the numeric keypad 32. Note that among the numerical data input using the numeric keypad 32, "
00'' to ``11'' correspond to both the chord root and the chord type, but may be set so that they do not overlap. Further, the input of the chord root and chord type in step 14 may be performed using each of the keys C1 to A5 of the keyboard 1 described above. Furthermore, the key number data of each component note of the code data thus input may be written into the assignment memory and generated.

8. Midi Data Processing FIG. 8 shows a flowchart of the midi data processing in step 07 above. In this process, the CPU 5 determines that the receiving channel of musical tone data input through the MIDI interface 15 is (n-1) channel, that is,
It is determined whether the channel number (n-1) is one lower than the MIDI receiving channel number n in the MIDI channel register 48 (step 41). If it is channel (n-1), it is determined whether the received musical tone data is key-on event data (step 42). If it is key-on event data, this key number data is pitch C1~
B1 (36-47) is determined (step 43).
).

If this key number data is of pitch C1 to B1, the chord root data corresponding to this key number data is stored in the chord memory 16 of the pattern ROM 9.
The data is read from and written to an edit register (not shown) (step 44). Also, the key number data is pitch C.
2 to A5 (step 45), the code type data corresponding to this key number data is read from the code memory 16 of the pattern ROM 9, written to an edit register (not shown), and the code type data in this edit register is read. The key number data of the constituent notes corresponding to the chord type and chord root is written into the assignment memory and produced (step 46). From this point on, the performance switches to this chord.

Note that if the chord type has already been written in the edit register in step 44, the content of the chord performance is changed at this point. Also, in step 41 above, the receiving channel of the received musical tone data is set to (n
-1) If it is a channel other than the channel, normal sound generation processing is performed without converting to a code (step 47).

[0051] In this way, the chord root and chord type can be easily input by simply inputting two key numbers (pitch) data. This step 42-46
The process is executed regardless of whether the monocode mode is selected, but it may be configured to be executed only when the monocode mode is selected.

Note that the numerical data may be determined in step 42 and converted into a chord type and chord root corresponding to the numerical data in steps 43 to 46. The processing of steps 42 to 46 may be executed by the key processing of step 09 or the panel switch processing of step 03 described above.

9. Sequence Performance Processing FIG. 9 shows a flowchart of the sequence performance processing in step 05 above. This process is performed when the tempo counter 65 overflows and a time of 1/48 beat has elapsed. This sequence performance processing includes sequence performance processing of chords and sequence performance processing of rhythms, melodies, basses, etc. other than chords, and after one processing, the other processing is performed, but both are almost the same processing. Therefore, only the chord sequence performance processing will be described in detail below.

In this process, the CPU 5 clears the tempo counter 65 (step 84) and increments the sequence clock counter 66 by 1 (step 85). and,
It is determined whether the value of this sequence clock counter 66 is divisible by "48" (step 86). When the time corresponding to one beat has passed, the value of the sequence clock counter 66 becomes divisible by "48". When the value of the sequence clock counter 66 is divisible by "48", the LE
"11...1" is set in the D counter 50 (step 87), and the LED 8 is turned on (step 88). Thereby, the LED 8 is switched from off to on every time the sequence clock counter 66 is incremented by 48, that is, every time for one beat.

Next, if the value of the sequence clock counter 66 exceeds the value 48 times the maximum beat number data in the maximum beat number register 51 (step 89), the sequence clock counter 66 is cleared (step 9).
0), and the bar counter 67 is incremented by 1 (step 91). Then, sequence information is processed (step 92).
. This sequence information processing is a process of reading code data etc. in the sequence information and transferring data corresponding to the key number data of the constituent sounds to the assignment memory and the LCD 7.

10. Sequence Information Processing FIG. 10 shows a flowchart of the sequence information processing in step 92 above. In this process, when the step time data of the next information in the sequence information matches the value of the sequence clock counter 66, the CPU 5 reads out the next musical tone information (step 51). Returns if they do not match. If there is no musical tone information in this read area (step 52), the process returns directly. If there is musical tone information, it is determined whether this musical tone information is the last information (step 53). If the information is at the end, return, end, etc. processing is performed (step 54). If it is not the information at the end, it is code data.

[0057] Then, the CPU 5 sets data corresponding to the key number data of the constituent notes of this chord in the assignment memory, performs automatic performance sound generation processing according to this chord (step 55), and displays the data on the LCD at all times. Write to register 61 (step 57). This writing area is the area of the 5th to 8th characters on the LCD 7.

The sound generation process in step 55 is a process in which key number data, tone number data, velocity data, part data, on/off data, etc. corresponding to the musical tone information are written into the assignment memory and then sounded. When this sound is produced, the on/off data is in the on state, and when the gate time has elapsed and the sound is muted, the on/off data is in the off state. In the case of chord data, the constituent notes of this chord are changed to key number data. In the case of bar mark data, a flag is set and sequence performance processing is no longer performed, and when the sequence clock counter 66 is cleared at the beginning of the next measure, the above flag is also cleared and sequence performance processing is restarted. Ru.

Next, the CPU 5 reads step time data of the next code data at the current read address of the sequence information (step 58). It is determined whether this step time data is larger than the value of data for one measure (step 59). If it is smaller, the next code data is read out and written into the LCD constant display register 61 (step 60). This writing area is
This is the area from the 11th character to the 14th character of D7. At this time, "→" data is also written in the area for the ninth character. As a result, as shown in FIG. 12(2), the chord to be played next is displayed in addition to the chord currently being played, and the chord to be played next is known in advance.

[0060] Furthermore, in step 59, if the value is greater than the value of one measure's worth of data, the process of step 60 is not performed. As a result, as shown in FIG. 12(3), when the currently played chord continues for one measure or more, the next chord to be played is not displayed, indicating that the currently played chord will continue for a while.

Note that the target data to be determined in step 59 may be data of two or more bars instead of one bar. Further, the process of step 55 may be selectively executed by mode setting of the keys 21 to 34 or the volumes 35 to 38. If step 55 is not performed, the player can practice playing chords on the keyboard 1 while looking at the chords displayed on the LCD 7. Furthermore, the next chord data is read out in step 58, and the next chord data read out is compared with the currently playing chord data read out in step 51. If they do not match, the process proceeds to step 60, and if they do not match. If so, it may be returned. In addition, if the next information is read in step 58 and the next information read is not bar mark data,
The process may proceed to step 60 and return if it is bar mark data.

11. Interrupt processing at fixed time intervals FIG. 11 shows interrupt processing at fixed time intervals. This process is performed when the CPU 5 receives an interrupt signal that is periodically output at fixed time intervals, regardless of the set tempo, by a timer process that counts clock signals that control the entire electronic musical instrument. In this process, the CPU 5 accumulates the decoded tempo data in the tempo data register 46 in the tempo counter 65 (step 101), and the CPU 5 accumulates the decoded tempo data in the tempo data register 46 in the tempo counter 65 (step 101), and
The data set in is incremented by 1 (step 102). This decrement is performed for each interrupt process, so after a certain period of time, the value of the LED counter 50 becomes "0".
become. When the value of the LED counter 50 becomes "0" (step 103), the LED 8 is turned off (step 10).
4). As a result, the LED 8 is switched from being lit to being turned off at regular intervals, regardless of the set tempo.

Next, the CPU 5 decrements the time data set in steps 14 and 18 in the display timer register 63 (step 105). This decrement is also done for each interrupt process, so
After a certain period of time, that is, 5 seconds, the display timer register 63
The value of becomes "0". The value of the display timer register 63 is “
0'' (step 106), step 13 above,
The data set in the LCD temporary display register 62 in step 17 is cleared, and the data in the LCD permanent display register 61 is sent to the LCD 7 (step 107). This results in
Transpose data is displayed for only 5 seconds after the - key 25a, + key 25b or overdrive key 21 is operated, and then the original data is displayed.

12. Display Example of LCD 7 FIG. 12 shows the above-mentioned temporary display switching of LCD 7. When the automatic performance mode is set, the song number "00", song name "Z&Roll", and first chord "A7" of the selected sequence information are displayed as shown in (1). During automatic performance, the chord "Am" currently being played and the chord "Eaug" to be played next are displayed as shown in (2). When the same chord, for example "E7", continues during automatic performance, only "E7" is displayed. This (1) (
In 2), the song number "00" is also displayed. When the - key 25a and + key 25b are operated, (
The transpose data of "Transpose" and "+1" are temporarily displayed as shown in 4). When the overdrive key 21 is operated, "Ove" is activated as shown in (5).
Data indicating whether "rdrive" and "on" are on/off is temporarily displayed. When the chord edit mode is selected, the number of measures, number of beats, number of steps, chord root, and chord type are displayed as shown in (6). In this display example, the first beat (
At the 00th step ("00") of "1"), the performance chord changes to Adim (A diminished). This display is a continuous display.

The present invention is not limited to the above-mentioned embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the keys for inputting code data may be alphabet keys, symbol keys, kana keys, etc. in addition to the numeric keypad 32. Furthermore, the sequence information stored in the data RAM 10 is not only data for one song, but also data for one to several bars,
It may be sequence information of one to several phrases or one to several motifs. Furthermore, the sound system 13 may be omitted, in which case it would output data or sequence information to be written into the assignment memory via the MIDI interface 15.

[0066]

As described in detail above, the present invention allows the chord type or chord root to be input by means of inputting character data such as a numeric keypad. This makes it easier to input codes and eliminates the need for difficult fingering. Further, according to the present invention, a chord type is input using at least one of the pitch input means for a plurality of pitches, and a chord root is input using at least one of the other pitch input means. This makes it easy to play chords and allows you to play a wide variety of chord types. Furthermore, the present invention displays not only the chord type and chord root currently being played, but also the chord type and chord root to be played next. As a result, the content of the chord to be played next can be known in advance, and the chord performance can be performed smoothly.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a code memory 16.

FIG. 2 is an overall circuit diagram of the electronic musical instrument.

FIG. 3 is a diagram showing keys 21 to 34, volumes 35 to 38, etc. of a group of panel switches.

FIG. 4 is a diagram showing a data RAM 10.

FIG. 5 is a diagram showing a working RAM 6. FIG.

FIG. 6 is a flowchart diagram of the main routine.

FIG. 7 is a flowchart of panel switch processing (step 03).

FIG. 8 is a flowchart of midi data processing (step 07).

FIG. 9 is a flowchart of sequence performance processing (step 05).

FIG. 10 is a flowchart of sequence information processing (step 92).

FIG. 11 is a flowchart of interrupt processing at fixed time intervals.

FIG. 12 is a diagram showing an example of display on the LCD 7.

[Explanation of symbols]

3... Panel switch group, 5... CPU, 6... Working R
AM, 10...Data RAM, 25a...-Key, 25b...
+ key, 32...numeric keypad, 33...special key, 41
...Write protect flag register, 42...Mode flag register, 43...Effect flag register, 44
...Overdrive data register, 45...Transpose data register, 46...Tempo data register, 47
...Tone number data register, 48...Midi channel register, 50...LED counter, 61...LCD constant display register, 62...LCD temporary display register, 63...
Display timer register, 65... Tempo counter, 66... Sequence clock counter, 67... Bar counter.

Claims (6)

[Claims] 1. A character data input means for inputting character data, and a conversion means for converting the character data inputted by the character data input means into code type data indicating a code type or code route data indicating a code route. and output means for outputting chord type data or chord root data converted by the conversion means. 2. A chord processing apparatus according to claim 1, wherein said input means is switchable between means for inputting a chord type and means for inputting a chord root. 3. A plurality of pitch input means for inputting pitch data, and a chord type indicating the type of the chord by which the pitch data inputted by at least one pitch input means among the plurality of pitch input means is input. chord type conversion means for converting into data, and chord root conversion for converting pitch data inputted by at least one other pitch input means of the plurality of pitch input means into chord root data indicating the root of a chord. What is claimed is: 1. A chord processing device comprising: means; and output means for outputting chord type data and chord root data converted by the chord type converting means and chord root converting means. 4. A chord storage means for storing chord type data indicating the type of chord and chord root data indicating the root of the chord; and chord storage means storing the chord type data and the chord root data according to the progress of the performance. a first reading means for reading out the code type data and a first display means for displaying the code type data and chord route data read out by the first reading means; a second reading means for reading out chord type data and chord root data following the data and chord root data; and a second reading means for displaying the chord type data and chord root data read by the second reading means.
A code processing device comprising: display means. 5. If the chord type data and chord root data read by the first reading means and the next chord type data and chord root data are stored apart from each other by one or more measures, the above-mentioned 5. The code processing apparatus according to claim 4, wherein the second display means does not display any information, and the second reading means does not read any information. 6. If the chord type data and chord root data read by the first reading means match the next chord type data and chord root data, the second display means displays the 5. The code processing device according to claim 4, wherein the code processing device does not.