JPS6028360B2 - electronic organ - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION When playing multiple rhythms simultaneously, an automatic rhythm device generates rhythm instrument sounds according to multiple rhythm patterns, but an automatic accompaniment device generates rhythm instrument sounds according to one of the multiple rhythm patterns. This invention relates to an electronic organ that generates accompaniment sounds with priority given to one of the following.

The circuit configuration of a conventional automatic base or automatic arpeggio is shown in FIG.

In the figure, a chord played on an accompaniment keyboard 1 is detected by a chord detection circuit 2, and a root tone signal and a chord signal representing the type of chord are output. For example, when performing automatic bass or automatic arpeggio accompaniment with five types of chords: major, minor, seventh, augment, and diminished, the root tone signals are root, 3', 3, 5', 5, and 6.
Eight encoders 3 for '' degrees, 6' degrees, and 7' degrees convert the signal into signals corresponding to the respective degrees. On the other hand, a rhythm pulse generating circuit 4 generates a read pulse and an attack pulse for reading out a read only memory (ROM) 5. In the ROM 5, the stored contents are switched according to the type of code according to the code signal from the code detection circuit 2.
A selection signal corresponding to the type of code is output by the read pulse from the rhythm pulse generation circuit 4. ROM5
The selection circuit 6 selects the encoder 3 according to the selection signal from the encoder 3.
The selected signals are sequentially sent to the musical tone gate 7. For example, if a major is specified by the code signal, the selection circuit 6 outputs the nu-tone, 3rd, 5th, 6th, 7'
The degree signal is selectively output. The musical tone gate 7 passes the scale signal according to the signal selected by the selection circuit 6, the amplitude is controlled by the attack pulse from the rhythm pulse generation circuit 4 in the envelope circuit 8, and then the signal is emitted through the filter 9, the amplifier 10, and the speaker 11. be heard. In this conventional configuration, when the number of code types increases, the ROM 5 needs to have the same number of memory contents as the number of code types.
is complicated and expensive.

Also, as the number of code types increases, the number of encoders 3 also increases.
As the number of wires increases, the number of bits of the selection circuit 6 also increases, resulting in a considerably complicated configuration. Furthermore, when the bass or arpeggio progression spans octaves, it is difficult to control the octave. In response, the applicant has proposed in a separate application an automatic accompaniment device with a simple structure in which the wiring of the integrated circuit of the ROM contents does not change much even if the number of chord types increases. That is, a pattern related to one type of chord is stored in the ROM, and is converted into patterns related to various chords by combining it with an external circuit such as a note conversion circuit. It is explained in Furthermore, one of the problems with conventional automatic accompaniment devices is that when playing a normal musical instrument, if several rhythms, for example, a beginning and a mambo, are played simultaneously, a very favorable musical effect may be obtained.

In such a case, the automatic accompaniment device will have to select several IJ rhythm selection switches at the same time, so that the rhythm sound will play several rhythms at the same time, and the bass sound and arpeggio sound will also output several patterns at the same time. This is not good for my sense of intelligence. Furthermore, if the ROM outputs are ORed, the binary signals of each pattern will be calculated, resulting in completely unrelated pattern signals being output. SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic organ equipped with an automatic accompaniment device so as to obtain favorable musical effects when playing a plurality of rhythms simultaneously.

In order to achieve the above object, the electronic organ of the present invention is a Ryuko organ having an automatic rhythm device and an automatic accompaniment device, wherein the automatic accompaniment device stores note name information,
a memory circuit that sequentially outputs pitch name signals in binary numbers according to the output of a counter counted by a clock; a pattern selection switch that selects a rhythm pattern of the pitch name signal from the memory circuit; a musical tone converting circuit for converting into musical tones, and a priority circuit for determining the priority order of patterns of tone name signals to be simultaneously converted into musical tones between the pattern selection switch and the storage circuit, When selected, the automatic rhythm device simultaneously outputs a plurality of rhythm instrument sounds corresponding to the plurality of selected switches, and the automatic accompaniment device outputs one of the plurality of rhythm patterns selected by the pattern selection switch. The invention is characterized in that one of the following is preferentially selected by the priority circuit. The present invention will be described in detail below with reference to examples.

FIG. 2 is an explanatory diagram showing the configuration of an embodiment of the present invention, and shows an overall block diagram of an automatic accompaniment device consisting of an automatic bass circuit and an automatic albeggio circuit.

In the figure, during normal accompaniment, a chord played on the accompaniment keyboard opens the musical tone gate 23 in response to a key depression signal from the accompaniment keyboard circuit 21, allowing a scale signal corresponding to the key depression to pass through. The scale signal that has passed through the musical tone gate 23 is sent to the gate 24.
At this time, a rhythm is generated by the rhythm pulse from the rhythm pattern generation circuit 59, and the rhythm signal is transmitted through the filter 25 and the amplifier 26, and at the same time, the rhythm signal is outputted from the rhythm pattern generation circuit 59 through the rhythm sound source 60, the amplifier 61, and the speaker 62. be done. On the other hand, the key press signal is given to the chord detection circuit 22, which detects the root note and chord type and sends it to the automatic bass circuit and automatic arpeggio circuit. In these circuits, the starting switch SW. By closing a, a reset signal is output from the differentiating circuit 27, and the counters 29 and 30 driven by the clock generator 28 and the rhythm pattern generation circuit 59 are reset, so that they operate synchronously. First, the automatic base circuit uses counter 3.
The contents of the ROM 32 are read by outputting 0.

The ROM 32 stores an automatic bass pattern corresponding to the C major chord, and outputs a pitch name signal in binary according to the pattern. Table 1 shows these pitch name signals in 4-bit binary numbers. The automatic bass pattern output from the ROM 32 can be inputted using a pattern selection switch (not shown) to switch the contents of the ROM 32 according to the type of rhythm, such as samba, mambo, ballad, etc. You can get the following information.

This pitch name signal is stored in the latch circuit 36 using the attack signal from the ROM 32 as a latch pulse.

This attack signal is applied to a latch circuit 36 and an envelope circuit 54 via a gate circuit 34. In this case, the gate circuit 34 is connected to the performance switch SW. This allows the attack signal to pass when b2 is closed. That is, starting switch SW. a, reset the counter 30, and read the bass pattern from the ROM 32, the performance switch SW. Envelope circuit 5 unless b2 is closed
4, no attack signal is given and no musical tone is generated. Now, the note name signal stored in the latch circuit 36 is input to the note conversion circuit 39. Here, the chord signal from the chord detection circuit 22 is converted into a pitch name signal corresponding to the type of chord. Table 2 shows how notes are converted depending on the type of chord, typically for a bass progression in a swing rhythm. The pitch name signal corresponding to the chord type is then sent to the chord detection circuit 22 in the addition circuit 41.
It is added with the Enoki signal from . The root signal is also output as a 4-bit binary number as shown in Table 1. Table 3 shows, as an example, the relationship between the input and output of the adder 41 when the root note is "0101''.Table 3 shows the 5-bit sound added to the root signal by the addition circuit 41. The famous signal is 16 ships - 12
It is converted into a decimal number by a decimal conversion circuit 43.

Table 4 shows the input/output relationship of this 16-to-12-decimal conversion circuit. The most significant of the 5 bits is carried up by the numerical value 13, and this carry signal is sent to the gate 52, and the lower 4 bits are sent to the tone gate 47.

A fourth table tone gate 47 derives a scale signal corresponding to the lower four bits of the fourth table output.

The derived scale signal is frequency-divided by 1/2 and 1/4 in a frequency dividing circuit 50, and input to a gate 52, respectively. At the gate 52, the 1/2 frequency division output and the 1/4 frequency division output are selected by the aforementioned carry signals "0" and "1" from the 1-to-12 conversion circuit 43, and the envelope circuit 5
Sent to 4. The envelope circuit 54 controls the amplitude of the scale signal using the aforementioned attack signal. Thereafter, the sound is emitted through a filter 5.6, an amplifier 58, and a speaker 63. Next, the automatic arpeggio circuit will be explained.

The ROM 31 is read out by the output of the counter 29 in the same way as the eye*function base circuit. The ROM 31 stores an albeggio pattern corresponding to the C major chord, and outputs the pitch name signal as a 2-bit binary number and the octave signal as a 2-bit binary number. Here, in the case of albeggio, four types of note name signals can be output with 2 bits, but this is because albeggio usually consists of only three or four tones that make up a chord. Since the albeggio spans several octaves, four types of octave signals are prepared. It is also possible to obtain various albeggio patterns by changing the contents of the ROM 31 using a pattern selection switch which changes the pattern according to rhythms such as mambo, swing, march, etc. These pitch name signals and octave signals are stored in the latch circuit 35 using the attack signal from the ROM 31 as a latch pulse. Here gate circuit 3
3 is the performance switch SW. This is to allow the attack signal to pass when the bl is closed. That is, in the case of the automatic base, the starting switch SW. Close a and counter 29
Even if you reset the pitch name signal and octave signal of the albeggio pattern from the ROM 31, the performance switch SW. Unless bl is closed, no attack signal is given to the envelope circuit 53, and no arpeggio sound is generated.
Now, the 2-bit pitch name signal stored in the latch circuit 36 is input to the code conversion circuit 37, and the 4-bit C, E, G
It is converted into a sound name signal of the visual pupil. Further, this pitch name signal is converted by the note conversion circuit 38 into a pitch name signal corresponding to the chord type of the chord signal from the chord detection circuit 22. Table 5 shows an example in which a 2-bit pitch name signal is converted into a 4-bit pitch name signal depending on the type of chord. Table 5 The pitch name signal thus converted into 4 bits is then added to the sound signal from the chord detection circuit 22 in an adder circuit 40'.

This adder circuit 40 is the adder circuit 4 in the automatic base circuit.
It is the same as 1. The 5-bit 16-bit pitch name signal added to the modal sound in the adder circuit 40 is converted into 5-bit 12-digit signal by the 1-Kin Hayabusa-12-decimal conversion circuit 42 using the same method as the input/output relationship in Table 4 above. It is converted into a base number, and a corresponding musical scale signal is derived at a musical tone gate 46. The derived scale signal is divided into four frequency division ratios 1/2, 1/4, 1/8,
The frequency is divided into 1/16. On the other hand, the 2-bit octave signal stored in the latch circuit 35 is added to the most significant carry signal from the 16-12 decimal conversion circuit 42 in an adder circuit 48, and the signal from the frequency divider circuit 49 is converted into an octave signal in a gate 51. Controlled and selectively derived. The signal that has passed through the gate 51 is amplitude-controlled by an attack signal in an envelope circuit 53, and is emitted via a filter 55, an amplifier 57, and a speaker 62. Next, a detailed view of the figure part in the embodiment shown in FIG. 2 will be explained. FIG. 3 shows a specific circuit from the clock generator 28 in FIG. 2 to the latch circuit 36 in the automatic base circuit and to the latch circuit 35 in the automatic arpeggio circuit, and these circuits are common to both. Starting switch SW. When a is closed, delay circuit 1 16
A trigger pulse is generated by the NAND circuit 1 1 1, and the counters 30 and 29 are reset. counter 30
, 29 is the first counter (flip-flop FFIOI
~FFI05) and the second counter (FFI06~FFI
Q output C of each FF of the second counter
,~C5 reads the contents of ROM32, 31, and outputs 4-bit pitch name signals 1~4 in the case of automatic bass.
In the case of an automatic arpeggio, it outputs 2-bit note name signals 1 and 2, 2-bit octave signals 1 and 2, and an attack signal. These pitch name signals 1 to 4 or pitch name signals 1 and 2 and octave signals 1 and 2 are supplied to a latch circuit 36,
35, that is, each of the ○ terminals of ○-type FFs 121 to 124, and the performance switch SW. If b is closed, the attack signal is inverted via the NAND circuit 1 12, 113 and input as a latch circuit to the C terminal of each ○-shaped FF 121 to 124, and the blue name signal or octave signal of the D terminal is stored. and sent to note conversion circuits 39 and 38 at the next stage. The attack signal is also sent to envelope circuits 54 and 53 through the NAND circuit 113. The pattern selection switch terminal selects the type of rhythm, such as rock,
Specify waltz, mambo, swing, ballad, etc.
In this case, a priority circuit 117 is provided that determines the priority order when these rhythms are designated simultaneously. Depending on the specified rhythm, the terminals CHR (
The states of address counter) mode 3, double tempo, and PD (pre-divider) mode 3 change. For example, if it is locked, PD mode 3 becomes "1" and NAND circuit 1
15, the first counter is corrected in ternary form, and if swinging, CTR mode 3 becomes "1" and NAND circuit 1
14, the second counter is ternary corrected, and if it is a waltz, PD mode 3 and CTR mode 3 are "1", and the first,
Perform ternary correction on the second counter. Further, the double tempo is set to "1" according to the rhythm, and the FFI05 is operated as an inverter. Table 6 shows an example of the count numbers of one pattern of the first counter and the second counter in pattern selection corresponding to each rhythm. As mentioned above, starting switch SW. a and performance switch SW. Since it has two control means of starting switch SW.b. a, the rhythm pattern generation circuit, automatic bass circuit, and automatic arpeggio circuit are operated in synchronization with the sixth table, and then the performance switch SW. By using b, it is possible to obtain a musical tone from a desired circuit.

Furthermore, since latch circuits 36 and 36 are provided at the outputs of the ROMs 32 and 31, even when a new rhythm is selected or automatic performance is stopped, there is no inconvenience that the sound changes midway or the sustain is interrupted. Figure 4 shows the main part of the present invention.
A specific circuit example of the priority circuit 117 shown in the figure is shown. That is, the ROMs 32 and 31 are provided with one non-priority switch VARI which is directly connected to the Hogo pattern selection switches PSI to 10 via the priority circuits 117. Now I'm 1~
Considering the case where tower 3 is turned on at the same time, PSI is “1”.
" is further inverted via the NOT circuit 201, and "1" is input to the ROMs 32 and 31. Next, the inverted input "0" of PSI and the input "1" of PS2 are connected to the NAND circuit 2.
It is further inverted through 02 and stored in ROM32 and 31''
0" is input. Next, I 2's input "1" and Iku 1's input "
1" passes through the NOR circuit 203', and its output "0" is further inverted together with the output "1" of PS3 through the NAND circuit 203, and "0" is input to the ROMs 32 and 31. With this configuration, when PS2 is off, The same is true if only PSI and Aku 3 are turned on at the same time.In this case, the priority order is PSI>PS2>...>PS9>
Denoted by PSI O. Therefore, when multiple rhythms are specified at the same time in the automatic bass circuit or automatic arpeggio circuit, the pattern of the note name signal is selected and derived according to the preset priority order, achieving a good musical effect. I can do it. As explained above, according to the present invention, when a pattern selection switch is provided for selecting a rhythm pattern of a pitch name signal from a memory circuit (ROM), a priority circuit is provided between the selection switch and the memory circuit. This allows you to select multiple rhythms at the same time.
In the automatic bass circuit and the automatic arpeggio circuit, only one pattern is played, and a musically desirable effect can be obtained.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a subordinate example, FIG. 2 is an explanatory diagram showing the configuration of an embodiment of the present invention, FIG. 3 is a detailed explanatory diagram of the main part of the embodiment of FIG. 2, and FIG. This is an explanatory diagram of a specific circuit in the figure, in which 21 is an accompaniment keyboard circuit, 22 is a chord detection circuit, and 23 is an explanatory diagram of a specific circuit in the figure.
is a musical tone gate, 24 is a gate, 25 is a filter, 26 is an amplifier, 27 is a differentiation circuit, 28 is a clock generator, 29
, 30 is a counter, 3 "1, 32 are memory circuits (ROM)
, 33, 34 are gates, 35, 36 are latch circuits, 37
is a code conversion circuit, 38, 39 is a note conversion circuit, 40
, 41 is an addition circuit, 42 and 43 are 16-12 conversion circuits, 46 and 47 are musical tone gates, 48 is an addition circuit, 49,
5 frequency dividing circuits, 51, 52 are gates, 53, 54 are envelope circuits, 55, 56 are filters, 57, 58,
61 is an amplifier, 59 is a rhythm pattern generation circuit, 60 is a rhythm sound source, 62 and 63 are speakers, and 117 is a priority circuit. Figure Vessel diagram N Vessel diagram 〇 Ship diagram 4

Claims (1)

[Claims] 1. In an electronic organ having an automatic rhythm device and an automatic accompaniment device, the automatic accompaniment device has a memory that stores note name information and sequentially outputs note name signals in binary numbers according to the output of a counter counted by a clock. a circuit, a pattern selection switch for selecting a rhythm pattern of a note name signal from the storage circuit, a musical tone conversion circuit for converting the note name signal from the storage circuit into a musical tone, the pattern selection switch and the storage circuit; and a priority circuit that determines the priority order of patterns of note name signals that are simultaneously converted into musical tones, and when multiple selections are made with the pattern selection switch, the automatic rhythm device includes a priority circuit that determines the priority order of patterns of note name signals that are simultaneously converted into musical tones, and when multiple selections are made with the pattern selection switch, the automatic rhythm device corresponds to each of the selected multiple switches. The electronic organ is characterized in that the automatic accompaniment device simultaneously outputs a plurality of rhythm instrument sounds, and in the automatic accompaniment device, one of the plurality of rhythm patterns selected by the pattern selection switch is preferentially selected by the priority circuit.