JPS59131991A - Automatic accompanying apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention The present invention relates to an automatic accompaniment device that automatically generates accompaniment sounds such as chords, bass tones, rhythm tones, etc. However, it is designed to allow you to enjoy a variety of accompaniments.

Conventionally proposed automatic accompaniment devices read accompaniment pattern data from memory according to the type of rhythm selected by the performer, and generate chord timing signals, bass pitch signals, bass timing signals, rhythm pattern signals, etc. There is a device that generates , and controls the generation of accompaniment sounds such as chords, bass sounds, rhythm sounds, etc. according to the signals of and. However, in such an automatic accompaniment device,
Once a rhythm type is selected, the accompaniment pattern is determined depending on the rhythm type, which has the disadvantage that the accompaniment becomes monotonous.

□In order to eliminate such monotony of accompaniment, it has been proposed to provide a variation selection operator and to vary the accompaniment by appropriately operating this operator during performance. However, according to this method, (1) it is extremely difficult for beginners to operate the selection controls according to the song idea during performance, and (2) when the number of variations increases, the number of selection controls increases. This increases the number of controllers, making operation more difficult and increasing the space for arranging the controllers.

SUMMARY OF THE INVENTION An object of the present invention is to provide a new automatic accompaniment device that can produce a wide variety of accompaniment without manual operations such as selecting variations.

The automatic accompaniment device according to the present invention is characterized in that it determines a chord progression based on stored chord data, and selects and controls an accompaniment pattern that matches the chord progression according to the determination result. , embodiments shown in the accompanying drawings will be described in detail.

FIG. 1 shows an electronic musical instrument according to an embodiment of the present invention.

The melody key switch circuit 10 includes a number of key switches that are linked to the number of keys on the upper keyboard 10a, and is configured to supply melody key data corresponding to the pressed keys to the melody sound forming circuit 12. It has become.

The melody sound forming circuit 12 forms a melody sound signal corresponding to the pressed key based on the supplied melody key data, and the formed melody sound signal is supplied to the speaker 16 via the output amplifier 14. When exposed, the sound is converted.

Therefore, when a key is pressed on the upper keyboard 10a, a melody tone corresponding to the pressed key is played from the speaker 16.

The chord data memo IJ18, which is made up of a RAM (random access memory), is used to store chord name data for each bar corresponding to the chord progression of a certain piece of music.

As a data input means to the memory 18, the lower keyboard 20a
Examples include one using a microphone 22, one using a musical score sheet 24, and one using a magnetic tape 26.

When a chord is specified on the lower keyboard 20a, the accompaniment key switch circuit 20 including the lower keyboard 20a supplies chord name data CD indicating the specified chord name to the memory 18 and sends a write control signal WT to the write/read control circuit. 28.

Here, as the chord designation method in the accompaniment key switch circuit 20, it is possible to select a fingered chord method, a single finger method, or a single finger method. That is, when the fingered chord method is selected, when a chord is specified by pressing a plurality of keys on the lower keyboard 20a, chord name data indicating the chord name is generated. For example, when the three keys C, E, and G are pressed, chord name data indicating C major is generated. Also, if you select the single finger system, one key on the lower keyboard 20a specifies the root note, and the other keys specify the chord type. For example, if you press only the C key, you can select the C major note. Chord name data indicating the n1C key and its nearby Nimai (or black key) are generated.
When you press , chord name data indicating C mica (or C seventh) is generated. Note that the chord type may be determined depending on the number of keys pressed other than the root key.

The chord name data CD from the accompaniment key switch circuit 20 is
Data are sequentially written into the memory 18 by the action of the write/read control circuit 28 in response to the write control signal WT.

When the voice recognition device 30 specifies a chord name by voice using the microphone 22, it supplies chord name data CD indicating the chord name to the memory 18 and writes a write control signal WT.
The chord name data CD in this case is also written into the memory 18 in the same manner as described above.

The musical score character reading device 32 is equipped with an optical card reader or the like that sequentially reads the chord names written on the musical score sheet 24, for example, as shown in FIG. The chord name data CD is supplied to the memory 18 and the write control signal WT is supplied to the write/read control circuit 28. The chord name data CD in this case is also written into the memory 18 in the same manner as described above.

The magnetic reader 34 reads chord name data from the magnetic tape 26, and stores the read chord name data CD in a memo IJ.
At the same time, the write control signal WT is supplied to the write/read control circuit 28. The chord name data CD in this case is also written into the memory 18 in the same manner as described above.

Memory 18 using the above-mentioned data input means
After writing the chord name data for one song into , the accompaniment start switch 36 can be turned on to start the accompaniment operation.

That is, when the switch 36 is turned on, the on signal is supplied to the write/read control circuit 28 as the read mode signal RM, so that the circuit 28 enters the read mode. When the write/read control circuit 28 enters the read mode, it reads the chord name data for the first four measures from the memory 18.
supplies address signals to Therefore, the chord name data for the first four measures is read out from the memory 18 at high speed and supplied to the chord name register circuit 38.

The chord name register circuit 38 includes an eight-stage shift register having a circular loop, and the chord name data for the first four measures from the memory 18 is loaded into the shift register.

On the other hand, the ON signal of the switch 36 is supplied to the tempo oscillator 46, the counter 48, and the chord progression determination circuit 50 as an enable signal EN.

Therefore, counter 48 receives the tempo clock signal from tempo oscillator 46 and begins counting. Also,
The chord progression determination circuit 50 generates the first read command signal RD in response to the enable signal EN, and the chord name register circuit 3
Supply to 8.

The chord name register circuit 38 receives a command signal R to read chord name data for four measures previously loaded into the shift register.
D is read out and supplied to the chord progression determination circuit 50.

In this case, in the chord name register circuit 38, the chord name data for four measures is once read out from the shift register, but then loaded again into the original stage of the same shift register via a circular loop. to snatch

Of the chord name data for one measure, the chord name data for the first measure is reloaded into the shift register 41 and transferred to the current chord register 40.
2 is the chord component note designation data corresponding to the chord name of the first measure (for example, C major) (in the case of C major, 3 of C, E, and G
(data specifying the tone) is supplied to the chord sound source circuit 44.

The chord progression determination circuit 50 determines the chord progression based on the four measures of chord name data from the chord name register circuit 38.
An accompaniment pattern designation signal PTN is generated in accordance with the determination result. This accompaniment pattern designation signal PTN is supplied to an accompaniment pattern memory 52 consisting of a ROM (read only memory).

The accompaniment pattern memory 52 stores accompaniment control data corresponding to various accompaniment patterns determined depending on the chord progression mode and rhythm type, and includes an accompaniment pattern designation signal PTN and a rhythm type select switch (SW) circuit 54.
By repeatedly reading accompaniment control data corresponding to the accompaniment pattern selected by the rhythm type designation signal from the counter 48, a chord timing signal CT1, a pace pitch signal BI, and a base timing signal BT are generated. and a rhythm pattern signal RY.

The chord sound source circuit 44 forms a chord signal based on the chord constituent note designation data from the chord constituent note designation circuit 42, and the sending timing of this chord signal is controlled in accordance with the chord timing signal CT. ing. For this reason,
For example, a chord signal corresponding to the three chords C-E and G is sent out from the chord sound source circuit 44 in the form of a chord timing signal CT corresponding to the selected accompaniment pattern.

The chord signal from the chord sound source circuit 44 is supplied to the speaker 16 via the output amplifier 14, where it is acoustically converted. Therefore, if the chords to be sounded in the first measure are the three chords C-E@G, the speaker 16 will play these three chords.

The bass note designation circuit 56 specifies the bass note to be produced based on the chord name data from the current chord register 40 and the bass pitch signal BI.The bass note specification data from this circuit 56 is sent to the bass sound source circuit 58. supplied.

The pace sound source circuit 58 forms a bass sound signal based on the supplied bass sound designation data, and the sending timing of the bass sound signal is controlled according to the base timing signal BT. . For this reason, the bass sound signal is sent out from the bass sound source circuit 58 in a form clocked by the bass timing signal BT corresponding to the selected accompaniment pattern.

The bass sound signal from the pace sound source circuit 58 is sent to the output amplifier 1.
4 to the speaker 16, where the sound is converted into n1.

Therefore, the bass note to be produced in the first bar is played from the speaker 16.

The rhythm sound source circuit 60 generates a percussion instrument sound signal based on the rhythm pattern signal RY, and this percussion instrument sound signal is supplied to the speaker 16 via the output amplifier 14. Therefore, when the switch 36 is turned on, percussion instrument sounds are rhythmically produced from the speaker 16 according to the selected accompaniment pattern (rhythm pattern).

After the automatic accompaniment of the first measure starts as described above,
At the end of the first measure, the counter 48 generates the first measure pulse signal MP.

This bar pulse signal MP is supplied to the write/read control circuit 28, and the chord name data of the fifth bar is read out from the memory 18 in response to the pulse signal MP. The read chord name data is then loaded into a shift register in the chord name register circuit 38.

The chord progression determination circuit 50 sends the second read command signal RD to the chord name register circuit 3 in response to the first bar pulse signal MP.
8, and the chord name data of the first to fifth measures is read out from the chord name register circuit 38 to the chord progression determination circuit 50 in accordance with n. Then, the chord name data of the second bar is transferred from the chord name register circuit 38 to the current chord register 40.

The chord progression determination circuit 50 determines the chord progression based on the chord name data of the first to fifth measures, and sends out an accompaniment pattern designation signal PTN in accordance with the determination result. Normally, the accompaniment pattern signal PTN at this time does not specify an accompaniment pattern different from the previous accompaniment pattern, and from the accompaniment pattern memory 52, a chord timing signal CT, a pace sound 8 signal B, and a pace sound 8 signal I, a base timing signal BT and a rhythm pattern signal RY are generated.

Therefore, for the second measure as well, the automatic accompaniment sound generation operation is performed in the same manner as for the first measure. In this case, the chord and bass note generation operations are performed based on the updated chord name data from the current chord register 40, so the pitch of the chord and/or bass note to be generated is that of the first measure. Things are likely to be different depending on the situation.

After this, the same chord name data reading operation as described above is performed every time the counter 48 generates the measure pulse signal MP.
At the same time, an automatic accompaniment tone generation operation based on the chord name data in the chord name register circuit 38 is performed. Note that the chord progression determination circuit 50 regularly performs a chord progression determination operation based on eight bars of chord name data from the chord name register circuit 38.

Figure 2 (a) shows an example of a chord progression in the Dentz format, and Figure 2 (b) shows an example of a bass note progression that can be adopted for the chord progression in (a). .

When the chord progression discrimination circuit 50 detects a special chord progression in terms of tonality, surface format, etc. as shown in FIG. do. For this reason, for example, as shown in FIG. 2(b), the operation of making the bass sound patterns different between measures MA and MB is automatically performed.

Note that by specifying a different accompaniment pattern using the accompaniment pattern specification signal PTN, it is possible to change not only the bass sound but also chords, rhythm sounds, etc., and the changes to be made to each accompaniment sound are stored in the memory 52. Determined by the memory contents.

In the above embodiment, the chord name data for each bar is stored in the chord data memory, and the chord name data is read out in response to the bar pulse signal. However, as another example, the chord data memory may store the chord name data and the chord name data. Note length data may be stored and chord name data may be read out based on the note length data.

In this way, even more fine-grained accompaniment pattern selection control becomes possible.

Moreover, although the application of the present invention has been described above to the case where chords, bass sounds, and rhythm sounds are generated as accompaniment sounds, the present invention can also be applied to the case where accompaniment sounds such as arpeggio sounds are generated.

As described above, according to the present invention, since the accompaniment pattern is selected and controlled by determining the chord progression, it is possible to generate optimal accompaniment sounds in accordance with changes in the chord progression mode or the musical idea. Furthermore, since there is no need for any variation selection operations, even beginners can enjoy a wide variety of accompaniments.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an electronic musical instrument according to an embodiment of the present invention, and FIG. 2 (al and (b) are diagrams showing an example of a chord progression and a bass note progression, respectively. 18... chord Data memory, 28... Write/read control circuit, 38... Chord base register circuit, 44... Chord sound source circuit, 46... Tempo oscillator, 48... Counter, 50... Chord progression Discrimination circuit, 52...Accompaniment pattern memory, 58...Bass sound source circuit, 60...
Rhythm sound source circuit. Patent applicant: Nippon Musical Instruments Manufacturing Co., Ltd. Representative Patent attorney: Toshiaki Izawa

Claims (1)

[Claims] 1. storage means for storing chord data corresponding to a series of chord progressions, first reading means for reading out the chord data from the storage means, and determining chord progression based on the read chord data; a chord progression determination circuit that generates an accompaniment pattern designation signal; a storage device that stores accompaniment control data corresponding to various accompaniment patterns; a second reading device that reads out the accompaniment control data from the storage device; accompaniment sound signal generation means for controlling an accompaniment sound signal generation operation in accordance with the accompaniment control data; An automatic accompaniment device featuring a nishitado.