JP2565152B2 - Automatic accompaniment device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic accompaniment device such as an auto rhythm, and more particularly, to arbitrarily designate a variation pattern to be selected when randomly selecting a variation pattern such as a fill-in pattern for each rhythm type. The configuration makes it possible to select a variation pattern that suits the musical idea.

[0002]

2. Description of the Related Art Conventionally, as an autorhythm device capable of performing fill-in rhythm, a fill-in pattern corresponding to an operator associated with an operation is selected in response to an operation of one of a plurality of fill-in selection operators. Things are known.

In this type of device, if a desired fill-in pattern is selected while a rhythm performance is being performed in accordance with a waltz normal pattern, the rhythm performance is temporarily (for example, until the end of the bar) normal. Instead of the pattern, it will be performed according to the Waltz fill-in pattern, and the rhythm performance by the normal pattern can be changed.

[0004]

According to the above-mentioned conventional apparatus, since a plurality of fill-in selection operators and a plurality of fill-in patterns correspond to each other, only a specific fill-in pattern can be used when operating a specific fill-in selection operator. I can't choose. For this reason, a beginner may be confused about which fill-in selection operator should be operated during the rhythm performance, and it is difficult to smoothly perform the fill-in selection operation.

In order to deal with such a problem, it has been proposed to select a fill-in pattern randomly according to a switch operation. In this case, since a plurality of fill-in patterns to be randomly selected are predetermined, there is a problem that a fill-in pattern that does not match the musical idea is selected depending on the music.

It is an object of the present invention to provide a novel automatic accompaniment device capable of randomly selecting a variation pattern suitable for a musical composition for each rhythm type.

[0007]

The automatic accompaniment apparatus according to the present invention comprises (a) rhythm selecting means for arbitrarily selecting one of a plurality of rhythm types, and (b) this rhythm selecting means. Pattern output means capable of selectively outputting a normal pattern for automatic accompaniment and a plurality of M variation patterns for each selected rhythm type, (c) a pattern change command operator, and (d) the rhythm selection means Pattern specifying means for specifying a plurality N (N <M) of variation patterns for random selection among the plurality of M variation patterns for each rhythm type selected in
(E) pattern selecting means for randomly selecting a plurality of N variation patterns designated by the pattern designating means one by one each time the operator is operated, and (f) by the rhythm selecting means from the pattern output means. A normal pattern corresponding to the selected rhythm type is output, and a variation pattern related to selection is temporarily output from the pattern output unit in place of the normal pattern being output in accordance with the selection of the variation pattern by the pattern selection unit. And an accompaniment sound generating means for automatically outputting an accompaniment sound signal in accordance with the output pattern.

According to the structure of the present invention, since the pattern designating means for designating the variation pattern for random selection for each rhythm type is provided, the variation pattern suitable for the desired musical piece for each rhythm type is designated. Random selection can be performed.

[0009]

1 shows a circuit configuration of an electronic musical instrument having an automatic accompaniment apparatus according to an embodiment of the present invention. In this embodiment, a plurality of desired musical instruments are selected based on an operation of a pedal keyboard. After presetting the fill-in number, one of the fill-in patterns related to the preset can be randomly selected each time a key operation is performed on the pedal keyboard during the performance of the auto rhythm.

The upper keyboard (UK) 10 is mainly for playing a melody, and key operation information is detected for each key.

The melody tone forming circuit 12 forms and sends out a tone signal corresponding to the operation key according to the key operation information UKD from the UK 10. The tone signal from this circuit 12 is output to the speaker via the output amplifier 14. 16 and is converted into sound.

Lower keyboard (LK) 18 and pedal keyboard (P
K) 20 is used for accompaniment performance such as chords and bass, and key operation information is detected for each key.

The accompaniment sound generating circuit 22 includes a chord sound forming circuit, an arpeggio sound forming circuit, a bass sound forming circuit, etc., and can be operated in a manual mode or an automatic mode.

That is, the single finger mode designating switch SF and the fingered code mode designating switch F
When both C and the arpeggio mode designating switch ARP are turned off, the manual mode operation is possible, and the accompaniment sound generation circuit 22 causes the key operation information LKD from the LK 18 and / or the key operation information from the PK 20. PK
A tone signal corresponding to the operation key is formed and transmitted according to D. Then, the tone signal from the circuit 22 is output to the output amplifier 1
It is supplied to the speaker 16 via 4 and converted into sound.

On the other hand, the single finger mode designating switch SF or the finger code mode designating switch FC
When is turned on, the auto mode operation is possible. In the case of the single finger mode in which the switch SF is turned on, the root note of the chord can be designated by the operation of one key on the LK18 and the chord type (major, minor, sevens, etc.) can be designated by the touch bar, etc. In the case of the fingered code mode in which the FC is turned on, the code can be specified by operating a plurality of keys on the LK 18. Performer uses switch SF or F
When C is turned on, one of the preferred code designation methods is selected.

Regardless of which chord designation method is selected, when the autorhythm is started as described later, in the accompaniment tone generation circuit 22, the chord tone signal corresponding to the designated chord is generated from the pattern timing of the pattern memory 24. A bass sound signal corresponding to the designated chord is formed according to the base pattern signal BP from the pattern memory 24 while being formed in accordance with the signal CT. In such a case, when the arpeggio mode designating switch ARP is turned on, an arpeggio sound signal corresponding to the designated chord is formed according to the arpeggio pattern signal AP from the pattern memory 24. And
Accompaniment sound signals such as chord sound signals, bass sound signals, and arpeggio sound signals from the circuit 22 are supplied to the speaker 16 via the output amplifier 14 and converted into sound. The accompaniment sound generating circuit 22 having the above-mentioned function is known from, for example, Japanese Utility Model Application Laid-Open No. 57-51996 and can be easily realized by those skilled in the art, and therefore further detailed description will be omitted. .

The pattern memory 24 is composed of, for example, a ROM (Read Only Memory), and stores rhythm pattern information, chord timing information, bass pattern information, arpeggio pattern information and the like for each rhythm type such as march and waltz. are doing. Here, the storage format of the rhythm pattern is as shown in FIG. 2 as an example.

In FIG. 2, A is a storage unit for march, and B is
Is a storage unit for waltz. If the start address of the storage unit A for the march is a, the addresses a, a + 1, a + 2 ...
A normal pattern, a first fill-in pattern, a second fill-in pattern, ... An N-th fill-in pattern related to the march are stored in the a + n storage area. Similarly, when the head address of the waltz storage unit B is b, the normal patterns, the first fill-in patterns, the second fill-in patterns, etc. relating to waltz are stored in the storage areas of addresses b, b + 1, b + 2 ,. . Then, such a storage format is the same for other rhythm types. The number of fill-in patterns stored for each rhythm type can be set to 8, for example.

The rhythm selector 26 is for selecting a rhythm to be played, and has rhythm selection operators (eg, switches) corresponding to march, waltz, ... As an example.

The head address memory 28 is for converting the rhythm selection information from the rhythm selector 26 into head address information for the pattern memory 24. For example, the rhythm selection information regarding march is head address information indicating the head address a. Is converted to.

The adder 30 includes start address information from the start address memory 28 and a fill-in number designating circuit 40.
The pattern specifying information is transmitted by adding the fill-in number information FNO from the pattern memory 24. The pattern memory 24 specifies the pattern to be read according to the pattern specifying information from the adder 30. For example, when the head address information indicates the head address a (march), if the fill-in number information FNO is 0, the normal pattern of the march is read out, and if the fill-in number information FNO is 3, the third fill-in of the march is performed. The pattern is designated for reading. When specifying such a rhythm pattern, chord timing information about the march, bass pattern,
The arpeggio pattern and the like are also designated for reading.

The start / stop control circuit 32 is for controlling the start / stop of the auto rhythm, and when the start switch ST is turned on, it outputs a stop signal STP = "0". Further, it is possible to perform a synchronized start in synchronization with the start of the key depression based on the key operation information LKD from the LK18. For this purpose, the key depression can be started by the LK18 with the synchronized start switch CY turned on. By doing so, the stop signal STP = "0" is sent from the circuit 32 in synchronization with the start of key depression.
The start / stop control circuit 32 having the above-mentioned function is known from, for example, Japanese Utility Model Laid-Open No. 52-70436 and can be easily realized by those skilled in the art, and therefore a more detailed description is omitted. To do.

When the stop signal STP becomes "0", the pattern reading counter 34 is reset and released, and the tempo clock signal TCL from the tempo clock generator 35 starts counting. The counter 34 uses the tempo clock signal T
For example, the operation of counting CL for two bars is repeated, and the count output of the counter 34 is the pattern memory 2
4 is supplied. The counter 34 is adapted to generate the bar pulse BAR in synchronization with the end of the bar.

The rhythm pattern signal RP and the chord timing signal C are read from the pattern memory 24 based on the count output of the counter 34 by reading the patterns designated to be read according to the pattern designation information from the adder 30.
T, arpeggio pattern signal AP, bass pattern signal BP, etc. are transmitted, and the rhythm pattern signal RP is supplied to the rhythm sound source circuit 36.

The rhythm sound source circuit 36 has a rhythm sound source corresponding to a bass drum, a snare drum, a cymbal, etc., and a rhythm sound signal is generated by selectively driving these sound sources according to the rhythm pattern signal RP. It is supposed to occur. Then, the rhythm sound signal from the rhythm sound source circuit 36 is sent to the speaker 16 via the output amplifier 14.
Is supplied to and converted into sound.

Next, the fill-in number designating circuit 40 will be described. In this embodiment, prior to the start of the autorhythm performance, the PK 20 is used to preset the fill-in number in the preset memory 50 in the circuit 40. The memory 50 is, for example, a RAM (random access memory).

In this case, by turning on the switch SF or FC, the automatic gate code mode designation signal ABC = "1" is sent from the OR gate 38, and the switches ST and CY are kept in the illustrated state. A stop signal STP = "1" is transmitted from the start / stop control circuit 32. In this state, in the fill-in number designating circuit 40, the output signal of the AND gate 42 is "1", and accordingly, the gate circuit 46 is generated.
Is conducting.

Of the key operation information PKD from the PK 20, the key operation information for eight keys is O from the low tone side (even from the high tone side).
The signal is supplied to the R gate 44 and the gate circuit 46, and when one of the eight keys is pressed, the output signal = "1" is sent from the OR gate 44. The output signal of the OR gate 44 is
The write enable signal WE is supplied to the preset memory 50 via the gate circuit 46.

The fill-in number memory 48 is for converting the key operation information from the gate circuit 46 into a fill-in number corresponding to the pressed key. For example, the fill-in number when the lowest tone key of the eight keys is pressed. When the user presses the number 1 and the next lower key, the fill-in number is read out for each key, such as the fill-in number 2. Fill-in number information from the memory 48 is supplied to the memory 50.

The output signal of the OR gate 44 is the delay circuit 5
2 is supplied to the address counter 54, and the memory 5
The write address of 0 is designated according to the count output of the counter 54.

Now, in the PK 20, if the lowest note of the above-mentioned eight keys is pressed, the fill-in number 1 is written in the memory area of address 0 in the memory 50, and immediately after this, the counter 54 should be written. Specify address 1. Next, when you press another key of the 8 keys, the fill-in number corresponding to that key is stored in the storage area of address 1,
Similarly, the fill-in numbers for four keys can be preset in the memory 50. Fill-in number information for four keys preset in the memory 50 is supplied to the input terminals "0" to "3" of the preset selector 62, respectively.

After the preset operation as described above is completed, when the stop signal STP is set to "0" as described above in order to start the automatic rhythm performance, the inverter 56 receiving this signal inputs the rhythm running signal RUN = "1". Is sent.
Therefore, in the fill-in number designating circuit 40, A
The ND gate 58 has a signal R in addition to the signal ABC = “1”.
UN = “1” is added, but at this time PK20
If the key is not pressed by, the output signal of the OR gate 44 is "0" and the output signal of the AND gate 58 is "0". Therefore, the flip-flop 64 is not set,
Since the gate circuit 66 is non-conductive, the output of the adder 30 reads and designates the normal pattern of the rhythm selected by the rhythm selector 26. That is, in this case, the autorhythm performance is started according to the normal pattern.

When any one of the above-mentioned eight keys of the PK 20 is pressed at an arbitrary timing while the rhythm performance is progressing in this way, the output signal of the OR gate 44 becomes "1", and Accordingly, the output signal of AND gate 58 becomes "1". The output signal "1" is supplied to the random signal generation circuit 60 and also to the flip-flop 64 to set it. Therefore, the gate circuit 66 outputs the output Q of the flip-flop 60 = “1”.
It becomes conductive according to.

The random signal generating circuit 60 is a random signal generator (eg shift register, etc.) that constantly generates a 2-bit random signal that takes a random value over time.
And a latch circuit for latching the output of this random signal generator in accordance with the output signal of the AND gate 58. The output of this latch circuit (2-bit Signal) to the preset selector 62 as a selection signal SL. In this case, the latch circuit holds the random signal latched according to the operation of the PK 20 until the next operation time of the PK 20.

The preset selector 62 has a selection signal SL.
The fill-in number of any one of the input terminals “0” to “3” is selected according to the value of the signal SL.
And the selected input terminal “0”, “1”, “2”, “3”
And correspond respectively. In this case, since the value of the signal SL is randomly determined at each operation time point of the PK 20, the selector 62 randomly selects fill-in numbers of the input terminals "0" to "3".

The fill-in number selected by the selector 62 is supplied to the fill-in number information F via the gate circuit 66.
It is supplied to the adder 30 as NO. Therefore, for example, if the fill-in number 2 is selected by the selector 62 while the rhythm performance is proceeding according to the march normal pattern, the rhythm performance is performed according to the march second fill-in pattern instead of the normal pattern. become.

After this, the bar pulse BA is output from the counter 34.
When R is generated, the flip-flop 64 is reset in response to the bar pulse BAR, and the gate circuit 66 is rendered non-conductive in response to this. Therefore, the rhythm performance is again performed according to the normal pattern.

After this, the pattern change can be commanded by the PK 20 at an appropriate timing, and one of the preset fill-in patterns is randomly selected at each command, and the fill-in rhythm performance is performed until the end of the bar. Be done.

According to the above-described embodiment, the PK 20 which is not used for accompaniment is effectively used when the auto bass chord mode is selected to perform the fill-in number preset operation and the pattern change command (fill-in command) operation. It is not necessary to provide operators for these operations on the panel surface of the musical instrument, which has the advantages of simplifying the panel configuration and reducing the burden on the panel operation hands.

The present invention is not limited to the above-described embodiment, but can be implemented in various modified forms. For example, the following changes are possible.

(1) The UK and LK are two-stage keyboards,
The single-step keyboard is divided into upper and lower keys, and UK and LK respectively
It may be used as.

(2) The present invention can be applied not only to the fill-in pattern of the autorhythm but also to the variation pattern of the auto bass, the variation pattern of the auto arpeggio, and the like.

(3) When presetting the fill-in number, the fill-in number can be designated for each key of the PK. However, all the keys of the PK can be divided into a plurality of groups and the fill-in number can be designated for each group. Good.

(4) When the fill-in number is preset, the fill-in number is written in the preset memory 50 according to the PK operation. For example, when the rhythm selector 26 selects a rhythm, a preset data generator (not shown) is shown. Alternatively, a standard fill-in number (for example, 1 to 4) may be loaded into the memory 50.
By doing so, a relatively frequently appearing pattern that matches the rhythm is preset only by performing a rhythm selection operation, and one of the fill-in patterns that matches the rhythm can be automatically and randomly generated at the fill-in on timing. In this case, the stored contents may be rewritable by an operation such as PK.

(5) The preset memory 50 is a ROM storing a plurality of fill-in numbers for each rhythm type,
A group of fill-in numbers corresponding to the selected rhythm type may be supplied from the ROM to the preset selector 62 when the rhythm selector 26 selects a rhythm. In this case, a plurality of groups of fill-in numbers may be stored in the ROM for each rhythm type, and a fill-in number of any group may be selected and read by an operation such as PK.

(6) In PK, a key not used for presetting the fill-in number may be used as a rhythm selection operator (rhythm selector 26).

(7) Each time a fill-in number is written in the preset memory 50 in response to a PK operation, a fill-in pattern corresponding to the written fill-in number may be played to enable input confirmation.

(8) In order to simplify the panel structure, P is used as a pattern conversion command operator and a preset operator.
Although K is used, a dedicated one may be provided as each of these operators, or a manual one may be provided.

(9) The fill-in rhythm performance section is PK
However, it is not limited to this. For example, when a pattern change command is given within the section from the beginning of the measure to the second beat, the fill-in rhythm performance is set from the time of the pattern change command to the end of the measure, and the pattern change command is issued within the section from the second beat to the end of the measure. If is given, the fill-in rhythm performance may be performed from the beginning to the end of the next bar.

[0050]

As described above, according to the present invention, since a variation pattern for random selection is designated in advance for each rhythm type, it is possible to randomly select a variation pattern suitable for a musical idea for each rhythm type. Therefore, the accompaniment effect is improved. That is, even when accompaniment is performed for different songs with the same rhythm type (for example, waltz), it is possible to specify a variation pattern suitable for each song, so that optimal accompaniment can be performed for each song.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration of an electronic musical instrument according to the present invention.

FIG. 2 is a diagram showing a storage format of a rhythm pattern in a pattern memory 24.

[Explanation of symbols]

20 ... Pedal keyboard, 24 ... Pattern memory, 26 ... Rhythm selector, 28 ... Start address memory, 30 ... Adder, 32 ... Start / stop control circuit, 34 ... Pattern reading counter, 35 ... Tempo clock generator, 36
… Rhythm tone generator circuit, 40… Fill-in number designating circuit,
48 ... Fill-in number memory, 50 ... Preset memory, 60 ... Random signal generating circuit, 62 ... Preset selector, 64 ... Fill-in control flip-flop.

Claims (1)

(57) [Claims] 1. A rhythm selection means for arbitrarily selecting one of a plurality of rhythm types, and a normal pattern for automatic accompaniment for each rhythm type selected by the rhythm selection means. And pattern output means capable of selectively outputting a plurality of M variation patterns, (c) a pattern change command operator, and (d) a plurality of M variations for each rhythm type selected by the rhythm selection means. Pattern designating means for designating a plurality N (N <M) of variation patterns for random selection among the patterns; and (e) a plurality N of variation patterns designated by the pattern designating means each time the operator is operated. Pattern selection means for randomly selecting one by one, and (f) rhythm type selected by the rhythm selection means from the pattern output means In addition to outputting the normal pattern corresponding to, the pattern output unit temporarily outputs and outputs the variation pattern related to the selection in place of the normal pattern being output in accordance with the selection of the variation pattern by the pattern selection unit. And an accompaniment sound generating means for automatically generating an accompaniment sound signal according to a pattern.