JPH0580759A - Electronic musical instrument with automatic accompaniment function - Google Patents

Abstract

PURPOSE:To obtain timbre suitable for puretone generation corresponding to a style when an accompaniment key in the left key area on a keyboard is pressed in an automatic accompaniment stand-by state in the automatic accompaniment mode of the electronic musical instrument with the automatic accompaniment function. CONSTITUTION:Dummy timbre information showing feature timbre matching styles which do not have timbre matching the single independent sound generation in an accompaniment stand-by state among constituent sounds of an accompaniment pattern among styles of music which can be selected with panel switches 2 are stored in accompaniment pattern data on a ROM 8. When the key in the left key area 1L on the keyboard 1 is pressed in the automatic accompaniment stand by state, the musical sound of chord constituent sounds based upon a chord detected from the keying information is generated with the timbre of the dummy timbre information.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic accompaniment capable of producing a chord sound, a bass sound, a rhythm sound or the like based on an accompaniment pattern stored in a memory in addition to a performance on a keyboard. Regarding electronic musical instruments with functions.

[0002]

2. Description of the Related Art Conventionally, in this type of electronic musical instrument, tone color data such as chord sounds, bass sounds, and rhythm sounds, accompaniment pattern data indicating the sounding timing of each sound, etc. are stored in a memory, and each data is stored at a predetermined tempo. According to the above, it is read from the memory and an automatic accompaniment is performed.

Here, the accompaniment pattern data is, for example, C
It is stored as a note number (note name data) in a standard scale such as major, and this note code is converted into pitch data corresponding to a chord designated by an accompaniment key such as the left keyboard range. Then, the tone pitch data and the tone color data read from the memory are used to produce a tone with a predetermined tone pitch and tone color, respectively.

A plurality of types of tone color data and accompaniment pattern data of chord, bass, and rhythm sounds are stored according to the style of the song such as rock and country. Depending on the style of the song selected by a panel switch or the like. Automatic accompaniment with different rhythm and tone.

By the way, as described above, the keys such as the left key range are
In the automatic accompaniment mode, it is set as an accompaniment key different from the normal mode and is used for chord detection. Therefore, in the automatic accompaniment mode, when the accompaniment key is pressed in a state where the automatic accompaniment is not yet started or in a paused state, that is, in the standby state of the automatic accompaniment, the chord of the predetermined chord sound among the accompaniment patterns stored in the memory There are some that are made to sound with constituent sounds.

In this way, when the accompaniment key is depressed, a tone color different from that during normal key depression, that is, a tone color corresponding to the selected style, is produced, so that the performer can easily recognize that the accompaniment mode is currently in effect. You can know.

[0007]

However, as described above, when the sound is generated with the chord constituent tones of the predetermined chord of the accompaniment pattern, for example, a tone color that is not so important in the structure of the accompaniment tones. It may be sounded with a tone that is not suitable for individual sound generation, such as a tone with a very slow attack.

For this reason, for example, when switching from playing only the keyboard to ensemble playing with automatic accompaniment,
On the contrary, when switching from ensemble performance to keyboard-only performance, the performance in the automatic accompaniment standby state becomes unnatural, which is not preferable.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic musical instrument with an automatic accompaniment function that allows an appropriate performance in accordance with the selected style in the automatic accompaniment standby state.

[0010]

The electronic musical instrument with an automatic accompaniment function of the present invention made to solve the above-mentioned problems is capable of switching between an automatic accompaniment standby state and an operating state, and an automatic accompaniment operating state. An electronic musical instrument with an automatic accompaniment function for producing an automatic accompaniment based on a chord and an accompaniment pattern detected from key depression information in an accompaniment key on a keyboard,
Storage means for storing information on the accompaniment pattern of the automatic accompaniment and dummy tone color information indicating a tone color characteristic of the automatic accompaniment style and different from the tone color of the accompaniment pattern; In the standby state of the automatic accompaniment, the musical tone of the chord constituent tones based on the chord detected from the key depression information of the accompaniment key is generated based on the dummy tone color information stored in the storage means. To do.

[0011]

In the electronic musical instrument with the automatic accompaniment function of the present invention, the pronunciation control means, when in the automatic accompaniment operating state, sets the accompaniment pattern stored in the storage means and the chord detected from the key depression information of the accompaniment key. Automatic accompaniment based on Further, when the accompaniment key is pressed in the automatic accompaniment standby state, the pronunciation control means stores, in the storage means, musical tones of chord constituent tones based on chords detected from key depression information in the accompaniment key. A tone is produced based on the dummy tone color information, and the tone color at that time becomes a characteristic tone color according to the style of the automatic accompaniment.

[0012]

1 is a block diagram of an electronic musical instrument with an automatic accompaniment function according to an embodiment of the present invention, and FIG. 2 is a diagram showing a panel surface of the electronic musical instrument. The electronic musical instrument is controlled by a CPU 3, and a keyboard 1 and a panel. By operating the switch 2, the keyboard performance in the normal mode and the automatic accompaniment in the automatic accompaniment mode are performed.

The key-depression detection circuit 1a detects a key event on the keyboard 1 and outputs the key code corresponding to the key having the key event to the "H" level for the key-depression event and the "L" level for the key-release event. It is generated with the key-on signal that becomes the level. Further, the switch detection circuit 2a detects an event of a switch operation on the panel switch 2 and generates a signal corresponding to the operated switch.

The keyboard 1 is functionally composed of a right keyboard range 1R and a left keyboard range 1R.
In the automatic accompaniment mode, the right keyboard range 1R functions as a melody playing key, and the left keyboard range 1L functions as an accompaniment key. That is, in the normal mode, both the right keyboard range 1R and the left keyboard range 1L are sounded normally, but during the automatic accompaniment, the right keyboard range 1R is sounded normally and the left keyboard range 1L is not sounded. Only chords are detected. Further, in the automatic accompaniment mode in the automatic accompaniment standby state, the left keyboard region 1L is sounded with a tone color according to the selected style as described later.

As shown in FIG. 2, the panel switch 2 includes a mode switch 21 for switching between the automatic accompaniment mode and the normal mode, and a start / stop switch 2 for controlling the start and stop of the automatic accompaniment in the automatic accompaniment mode.
2. A plurality of style selection switches 23 for selecting the style of the musical piece to be played, a power switch 24, a plurality of tone color switches 2 for setting the tone color of the normal pronunciation such as the type of musical instrument 2.
It is equipped with 5. Further, various switches such as a tempo setting switch for adjusting the tempo of automatic accompaniment, a volume switch for adjusting the volume of keyboard performance, and a volume switch for adjusting the volume of automatic accompaniment are provided. The initial tempo value of the automatic accompaniment and the adjusted current tempo value are displayed on the display 41 of the display circuit 4.

The timer 5 generates a tempo clock interrupt signal at a timing set by the CPU 3,
3 takes in the tempo clock interrupt signal from the timer 5 as a tempo clock for automatic accompaniment, and controls the automatic accompaniment by interrupt processing.

The tone generator 6 is a tone generator such as a normal TG (tone generator) that generates a normal tone signal in response to a key press, an accompaniment TG that generates a tone signal of a chord sound or a bass tone during automatic accompaniment, and a rhythm sound. Rhythm TG that generates a signal
And generates a tone signal based on the note-on signal, tone color data, note number, etc. given from the CPU 3. This tone signal is output to a sound system 7 including an amplifier and a speaker, and the sound system 7 generates a tone based on this tone signal.

The ROM 8 stores a control program whose flow charts are shown in FIGS. 7 to 12, accompaniment pattern data for automatic accompaniment, a table for obtaining note numbers of chord-constituting sounds from chord types, and the like, which will be described later. As will be described, the CPU 3 controls while using various registers and flags set in the RAM 9 based on the control program in the ROM 8.

FIG. 3 is a diagram showing a format of accompaniment pattern data in the embodiment. A plurality of sets of accompaniment pattern data are stored for each style of music, and each accompaniment pattern data includes a header part and tracks 1 to 1.
8 and a pattern data section.

In the header part, a style number indicating the style of the accompaniment pattern, a standard tempo corresponding to the style,
The number of bars of the accompaniment pattern, a pattern data flag indicating the presence or absence of pattern data in each track of the pattern data section, and tone color data corresponding to each track are stored.

In the pattern data section, tracks 1 to 1
6 is associated with the chords 1 to 6, track 7 is associated with the base, and track 8 is associated with the rhythm. Pattern data is stored in predetermined tracks of the tracks 1 to 8 according to the style of the accompaniment pattern data. There is.

As shown in FIG. 4, in each pattern data, timing data and event data are stored for each note by the number corresponding to the number of measures in the accompaniment pattern, and the timing data is generated from the beginning of the measure. The timing is shown.

Further, as shown in FIG. 4A, the chord and bass event data are composed of a note number as pitch information, a gate time indicating sounding duration and a velocity indicating volume. The rhythm event data is composed of note numbers and velocities, as shown in FIG. 4 (B). Note that note numbers in the case of rhythm correspond to the types of percussion instrument sounds.

In this embodiment, a plurality of accompaniment pattern data is stored corresponding to each style of music, and these accompaniment pattern data are stored in two types as shown in FIGS. 5 and 6, depending on the style. Divided into types.

FIGS. 5 and 6 are views conceptually showing the storage state of accompaniment pattern data. FIG. 5 shows accompaniment pattern data in a style in which a sound suitable for a single note exists among the constituent sounds of the accompaniment. (Hereinafter, referred to as type A) is shown in FIG.
Type B. ) Is shown. The shaded portions in FIGS. 5 and 6 show a state in which valid data is stored.

As shown in FIG. 5, in the accompaniment pattern data of type A, pattern data of chord sounds are stored in tracks 1 to 3 and track 6, and patterns of bass sounds and rhythm sounds are recorded in tracks 7 and 8. Each data is stored. Also, tone color data for each chord sound, bass sound and rhythm sound (rhythm sound is a set of percussion sounds)
Are stored in the header section in association with the tone color numbers and the track numbers. The tone color number of the track 6 indicates a tone color suitable for single tone sound generation.

Further, in this example, the pattern data is stored only in the tracks 1 to 3 and the tracks 6 to 8, and no valid pattern data is stored in the tracks 4 and 5. Therefore, the pattern data flags for "1" for "with pattern data" and "0" for "without pattern data" are stored in the header section in association with the track numbers.

On the other hand, as shown in FIG. 6, in the accompaniment pattern data of type B, chord sound pattern data is stored in tracks 1 to 3, and bass pattern data and rhythm sound pattern data are respectively recorded in tracks 7 and 8. Remembered Also, the tone color numbers of each chord sound, bass sound and rhythm sound are track numbers “1”, “2”, “3”,
Tone numbers of tone colors that are associated with "7" and "8" and that are characteristic of the style of the accompaniment pattern data and that are suitable for single tone pronunciation are track number "6" as dummy tone color information.
Is stored in the header section.

Further, since the pattern data is stored only in the tracks 1 to 3 and the tracks 7 and 8, the pattern data flags are track numbers "1", "2",
“3”, “7” and “8” are set to “1”, and track numbers “4”, “5” and “6” are set to “0”.

As described above, in the accompaniment pattern data of type B, since there is no tone color suitable for individual tone generation among the tone colors of tracks 1 to 3 and tracks 7 and 8, the tone color number of the tone color suitable for individual tone generation. (Dummy tone color information) is stored in association with the track number "6" which is an empty track for the pattern data.

With respect to such an accompaniment pattern, the CPU 3, as will be described later, in the automatic accompaniment operation state, each pattern data and tone color only for the track number whose pattern data flag is "1" (with pattern data). The automatic accompaniment is controlled to be performed based on the numbers and. Further, in the standby state of the automatic accompaniment, when a key press is detected in the left key range 1L, a code corresponding to the tone color number of the track number “6” and the code detected from the key press information of the pressed key. Control is performed so that sound is generated based on the constituent sounds.

As a result, regardless of whether the accompaniment pattern data of the selected style is type A or type B, the pattern data and the tone color corresponding to each pattern data are automatically accompanied, and the automatic accompaniment is performed. In the standby state of No. 2, a tone color suitable for producing a single tone is always sounded with respect to the key depression in the left key range 2L.

FIG. 7 shows the main routine of the control program,
8 to 12 are flowcharts showing a subroutine and an interrupt processing routine, and the operation will be described based on each flowchart.

In the following description and each flowchart, each register and flag used for control are represented by the following label, and each register and flag and their contents are represented by the same label unless otherwise specified. "RUN": Run flag indicating standby state and operation state of automatic accompaniment "i": Track number "CHORD": Chord register storing type of detected chord (chord) "STYL": Stored selected style number Style register "TONE": Tone register that stores the selected tone number "T": Count register that counts the timing within the number of measures of automatic accompaniment

First, when the power is turned on, the CPU 1 starts the processing of the main routine of FIG. 7, and initializes the run flag RUN and various registers in step S1. Next, step S2
8 performs the key-pressing process of FIGS. 8 and 9, and the panel switch process of FIGS. 10 and 11 is performed in step S3. Then, in step S4, other processing such as displaying the tempo of the automatic accompaniment is performed, and the processing from step S2 onward is repeated.

First, the panel switch process will be described.
In the panel switch process S3 of FIG. 10, step S
In 31, it is determined whether or not the mode changeover switch 21 has been changed. If not, the process proceeds to step S35, and if so, it is determined in step S32 whether or not the automatic accompaniment mode is ON. Mode selector switch 2
If the operation No. 1 is not the automatic accompaniment mode ON operation, the normal mode is set in step S33, and the automatic accompaniment mode is turned ON.
If it is an operation, the automatic accompaniment mode is set in step S34.

Next, in step S35, it is determined whether or not the style selection switch 23 is turned on. If not, the process proceeds to step S37, and if it is turned on, the style number of the style selection switch 23 turned on in step S36 is set. Store in register STYL and proceed to step S37.

In step S37, the tone color switch 25 is turned on.
If it is not ON, the process proceeds to step S39 in FIG. 11. If it is ON, the tone color number of the tone color switch 25 turned ON in step S38 is registered in the register TONE.
And the process proceeds to step S39.

In step S39 in FIG. 11, start /
It is determined whether or not the stop switch 22 is turned on (whether or not it is operated). If it is on, the process proceeds to step S301, and if not, the process at step S305 is performed.

In step S301, the run flag RUN
Is inverted from "0" to "1" or "1" to "0",
In step S302, it is determined whether RUN = 1. If RUN is not 1 in this determination, the sound source 6 is generated in step S303.
All note off is output to step S305, and the process proceeds to step S305. If RUN = 1, the automatic accompaniment is prepared in step S304, and the process proceeds to step S305.

Then, in step S305, the other panel switches are processed to return to the main routine.
In the preparation for the automatic accompaniment in step S304, STY
A process of reading the header part of the accompaniment pattern data based on the style number set to L and a process of setting the generation timing of the interrupt signal of the timer 5 based on the standard tempo data of the header part are performed.

Next, in the key depression process S2 of FIG. 8, it is determined in step S21 whether or not there is a key-on event. If there is no key-on event, the process proceeds to step S29, and if there is a key-on event, the left key range is determined in step S22. (Accompaniment key range) It is determined whether or not it is 1L.

If the key-on event is in the left key range 1L in step S22, the process proceeds to step S23. If it is not in the left key range 1L, the key-on event is in the right key range (melody key range) 1R. With TONE
The tone color number instructed in, the note number and note-on of the depressed key are output to the sound source 6, and the process proceeds to step S29 in FIG.

At step S23, the automatic accompaniment mode is set to O.
It is determined whether or not N, and if it is not the automatic accompaniment mode, the process of step S24 is performed to perform the normal sounding of the left keyboard range 1L in the normal mode, and if it is the automatic accompaniment mode, the left keyboard range 1L is generated at step S25. The code detection process is performed based on the pressed key. The chord can be detected by using a method such as fingering that detects the chord from a combination of keys actually pressed, or a single finger that gives the chord to a simplified key pressing pattern.

When the code is detected in step S25,
The data indicating the code type detected in step S26 is stored in the register CHORD, and RUN =
It is determined whether or not 0. If RUN = 1, the process proceeds to step S29 in FIG. 9, and if RUN = 0, the process of step S28 is performed and the process proceeds to step S29.

The process of step S28 is a process for the accompaniment key in the automatic accompaniment standby state (RUN = 0) in the automatic accompaniment mode, and refers to the table from the data stored in CHORD to refer to the note number of the chord component note. Of the chord constituent sounds obtained in the previous processing, note-off is output to the sound source 6. The note number and note-on of the chord component sound newly added this time are output to the sound source 6 together with the tone color number of the track 6 stored in the header portion of the accompaniment pattern data of the currently selected style.

In step S29 of FIG. 9, it is determined whether or not there is a key-off event. If there is no key-off event, the process returns to the main routine, and if there is a key-off event, it is determined in step S201 whether or not it is the left key range 1L.

If the key-off event is in the left key range 1L in step S201, the process proceeds to step S202. If it is not in the left key range 1L, in step S203 the sound source 6 is the note number of the key having the key-off event. At, the note-off is output to the sounding channel and the process returns to the main routine. As a result, the sound is released when the key is released.

In step S202, it is determined whether or not the automatic accompaniment mode is ON. If it is not the automatic accompaniment mode, the process of step S203 is performed to mute the left keyboard range 1L in the normal mode, and the automatic accompaniment mode is set. If there is, the process of step S204 is performed.

In step S204, it is determined whether or not all the keys in the left key range 1L are key-off. If all the keys are not key-off, the process returns to the main routine. If all are key-off, all the keys are off in step S205. The key-off for the accompaniment sound of is output to the sound source 6, and the process returns to the main routine.

The automatic accompaniment process S5 of FIG. 12 is started at a timing corresponding to the current tempo by the tempo clock interrupt signal from the timer 5, and first, at step S51, R
It is determined whether or not UN = 1, and if RUN = 0,
In step S52, the count register T is reset, and the original routine interrupted by this interrupt processing is restored.

On the other hand, if RUN = 1, step S5
The count register T is incremented in 3 and "1" is set in the register i in step S54, and step S5
By incrementing the register i of 8 and the determination of step S57, the processes from step S55 onward are performed for each track number of "1" to "8", and step S55 is performed.
If the register i reaches "8" in the judgment of 57, the process proceeds to step S59.

In step S59, it is determined whether or not the count register T has reached a value corresponding to the number of automatic accompaniment measures, and if not, the original routine is directly returned to,
If it has reached, the count register T is reset in step S501 to return to the original routine.

Step S55 for each track number
In the processing of (1), it is determined whether or not there is pattern data on the track currently indicated by the register i, based on the pattern data flag of the header part in the accompaniment pattern data,
If there is no pattern data on the current track, step S
If there is pattern data, the process proceeds to step S56, and the process proceeds to step S57.

In the process of step S56, the pattern data (event data) of the track number i is read according to the current value of the count register T and the timing data of the currently selected accompaniment pattern data, and other than the track number "8". In the case of, the note number of the event data is converted according to the chord type specified by CHORD, and the converted note number, velocity, tone color number of track number i, gate time and note-on are output to the tone generator 6. .. When the track number is “8”, the tone color (set of percussion instrument sounds) number, note number and note-on of the track number “8” are output to the sound source 6.

By the above interrupt processing S5, for example, as shown in FIG.
In the case of accompaniment pattern data of, the chord sounds of tracks 1 to 3 and 6, the bass sound of track 7 and the rhythm sound of track 8 are sounded with the tone colors of the tone color numbers set to tracks 1 to 3 and 6 to 8, respectively. The automatic accompaniment is performed. If the accompaniment pattern data shown in FIG.
3 chord notes, track 7 bass notes and track 8
Rhythm sound is generated with the tone color of the tone color number set for each of tracks 1 to 3, 7, and 8, and automatic accompaniment is performed.

In the above embodiment, the dummy tone color (tone color number of the track 6 of type B) is not sounded during the automatic accompaniment operation, but it is not normally heard due to the velocity of the event data. You may make it a different level and pronounce it during automatic accompaniment. Also,
I'm trying to set a dummy tone to track 6, but
It may be another track.

Further, the present invention is not limited to setting a dummy tone color for an empty track, but provides a flag indicating whether a dummy tone color is used or not and dummy tone color data according to the style of a piece of music, and sets the selected tone style. If is using a dummy tone, it is pronounced with a dummy tone,
In the case where the dummy tone color is not used, one tone color may be generated from the components of the accompaniment pattern.

Further, accompaniment pattern data corresponding to a dummy tone color may be provided so that the dummy tone color is sounded by a melody such as arpeggio according to the chord of the accompaniment key while the automatic accompaniment is on standby. In the above embodiment, the accompaniment key is set to the left key range, but the accompaniment key is not fixed to a predetermined area, and the chord is detected by, for example, three keys from the low tone side during key depression. In this way, a full key / code detection type may be used.

[0060]

As described above, according to the present invention, in the electronic musical instrument with an automatic accompaniment function, dummy tone color information indicating a characteristic tone color according to the style of the automatic accompaniment and a tone color different from the tone color of the accompaniment pattern is provided. When the automatic accompaniment is in the standby state, the musical tones of the chord constituent tones that are based on the chords detected from the key depression information of the accompaniment key are generated based on the dummy tone color information. The timbre of the key can be made a characteristic timbre according to the style of automatic accompaniment. Therefore, an appropriate performance suitable for the selected style can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram of an electronic musical instrument with an automatic accompaniment function according to an embodiment of the present invention.

FIG. 2 is a diagram showing a panel surface in an example.

FIG. 3 is a format diagram of accompaniment pattern data in the embodiment.

FIG. 4 is a format diagram of pattern data in the embodiment.

FIG. 5 is a diagram showing an example of accompaniment pattern data of type A in the embodiment.

FIG. 6 is a diagram showing an example of accompaniment pattern data of type B in the embodiment.

FIG. 7 is a flowchart of a main routine in the embodiment.

FIG. 8 is a part of a flowchart of a key pressing process in the embodiment.

FIG. 9 is another part of the flowchart of the key pressing process in the embodiment.

FIG. 10 is a part of a flowchart of a panel switch process in the embodiment.

FIG. 11 is another part of the flowchart of the panel switch process in the embodiment.

FIG. 12 is a flowchart of an automatic accompaniment process in the example.

[Explanation of symbols]

1 ... Keyboard, 1L ... Left keyboard range (accompaniment key), 2 ... Panel switch, 3 ... CPU, 5 ... Timer, 6 ... Sound source, 8 ... ROM.

Claims (1)

[Claims] 1. An automatic accompaniment can be switched between a standby state and an operating state, and the automatic accompaniment is performed based on chords and accompaniment patterns detected from key depression information in an accompaniment key of a keyboard in the automatic accompaniment operating state. An electronic musical instrument with an automatic accompaniment function for producing sound, showing information of the accompaniment pattern of the automatic accompaniment, and a tone color characteristic of the automatic accompaniment style and different from the tone color of the accompaniment pattern. And storage means for storing dummy tone color information, wherein when the automatic accompaniment is in the standby state, the storage means stores the musical tones of chord constituent tones based on the chords detected from the key depression information in the accompaniment key. An electronic musical instrument with an automatic accompaniment function, which is characterized in that a sound is produced based on existing dummy tone color information.