JPS5828791A - Electronic musical instrument - 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 electronic musical instrument, and more particularly to an electronic musical instrument equipped with a memory for storing control data for generating musical tones.

Conventionally, a memory is provided in which control data for musical tone generation is stored, and the control data is read out from this memory in conjunction with performance operations on the keyboard section, and based on the successive contents, the control data is read out from the memory in conjunction with performance operations on the keyboard section. There is an electronic musical instrument that generates a second musical tone signal different from the first musical tone signal.

However, in the past, a dedicated key was provided for V) for reading control data from the memory, which caused the problem that performance operations were complicated.

This invention was made in view of these problems.
The purpose of this is to read out the control data stored in the memory with a simple operation, and based on this read content, generate a second musical tone signal in parallel that is different from the first musical tone signal generated by the performance operation on the keyboard. Our goal is to provide electronic musical instruments that are unique to our customers.

To this end, the present invention provides a multiple key press detection circuit for detecting that a plurality of keys are pressed in the keyboard section, and outputs control data from the memory one after another every time an output of this detection circuit is generated. It is designed to generate musical tone signals.

The present invention will be described in detail below based on the illustrated embodiment. FIG. 1 is a block diagram showing an embodiment of the present invention, and this embodiment records accompaniment chord data in a memory. 1. This is applied to a system in which a chord based on this chord data is produced together with a performance sound produced by a performance operation on a keyboard section.

In FIG. 1, the keyboard section 1 has a plurality of keys, and when any one of the keys is pressed, the pressed key is detected by the detection operation of the key press detection circuit 2. 1 key press detection circuit 2 is the keyboard section 1
When a pressed key is detected, key data KD corresponding to this pressed key is output.

In this case, when a plurality of keys are pressed at the same time, key data KD regarding these plurality of keys is output in parallel.

The key data KD output from the key press detection circuit 2 is supplied to the multiple key press detection circuit 3 and also to the selection input A of the selector 4. Furthermore, it is supplied to the selection manual B of the selector 4 via the single note priority circuit 5 which outputs the key data KD of the highest pitch preferentially among the key data KD related to the plurality of pressed keys.

Furthermore, the chord name detection circuit 6 and the keyboard section 1 detect which chord the key data KD regarding a plurality of pressed keys corresponds to, and in the keyboard section 1. (1) The selector 4 is supplied to the OR gate 7 which detects that the key is pressed.
EC side), and in a mode in which chord data is stored in the chord data memory 9, which will be described later, the selection manual A C,': A plurality of key data KD regarding the pressed keys of the chord from the supplied circuit 2 are selected. Selected and supplied to the melody sound forming circuit 8, and a mode changeover switch SW+
is switched to the tri raw side (PI, AY side), and in the mode of reading chord data from the chord data memory 9, the key data I (about the highest pitch key) from the circuit 5 supplied to the selection manual B is D is selected and supplied to the melody sound forming circuit 8.

When the melody sound forming circuit 8 is supplied with key data KD regarding chords from the selector 4, it forms a chord signal based on this key data KD and sends it to the speaker 11 via the amplifier 1.
A chord is generated from the speaker force 11 by supplying it to the speaker. Further, when the melody sound forming circuit 8 is supplied with key data KD relating to the highest pitch key from the selector 4, it forms a melody sound signal based on this key data KD, and causes the speaker 11 to generate a melody sound.

Here, the melody sound forming circuit 8 originally has a switch SW+
This is provided to form a melody sound signal according to the melody performance that is operated one key at a time on the keyboard section 1 in a performance mode in which the key is switched to the playback side, and the chord data is stored in the memory 9. In the storage mode, chord data is not given to the accompaniment tone forming circuit 12 (described later) and the chord corresponding to the chord data being stored cannot be monitored. KD is manually operated to form a chord signal. Thereby, when storing chord data in the chord data memory 9, the storing operation can be carried out while monitoring the chord corresponding to the chord data.

By the way, when a plurality of key data 4-KD are entered manually, the chord bubble detection circuit 6 detects which chord, such as C or G7, this key data i (D corresponds to), and detects which chord corresponds to the corresponding chord. Chord data (data indicating the root " and data indicating the type of chord such as a minor chord) is generated and supplied to the chord data memory 9.

The chord data memory 9 stores the chord data output from the chord bubble detection circuit 6 in the recording mode to the memory control circuit 13.
The stored contents are sequentially stored in accordance with the address signals from the memory control circuit 13 in the playback mode and supplied to the accompaniment tone forming circuit 12. The chord data writing operation is as follows. It is carried out as follows. That is, first switch SWl
Set the mode selector switch SW2 linked to the memory side (REC
side). Then, the memory control circuit 13 enters the write operation mode, updates the address signal for the data memory 9 by "+1" each time the key-off pulse OFF is supplied from the differentiator circuit 15, and writes chord data to the memory address specified by this address signal. becomes occupied.

Therefore, the number of keys corresponding to the chord data to be stored is sequentially pressed in chord units. Then, due to key suppression, the OR gate 7 outputs an any-key-on signal AKON ("IN@ number") which indicates that any key has been pressed. The differential circuit 15 outputs a differential pulse signal when the human input signal changes from 0'L to 1'.
Therefore, the differentiation circuit 15 outputs a differentiation pulse signal when all of the plurality of keys related to the chord are released. This differential pulse signal is supplied to the write instruction input signal terminal of the memory control circuit 13 as a key-off pulse KOFP. , As a result, the address signal corresponding to the chord data corresponding to the chord key pressed on the keyboard section 1 at the moment when the key is released is updated by "+1", and the memory address of the next chord data is specified. ,.

For example, if there is an Enqin piece as shown in the score in Figure 2,
For the first measure, press the C chord key, for the second measure, press the GV chord key, and in the same way, press the Gy, C, C chord keys for each measure thereafter. The chord data is stored in the memory 9 in the order in which they occur. In this case, time data representing consecutive times of the same chord is required for automatic reproduction of the sum "1", but this is stored in the memory 9 as a pair with the chord data by a circuit not shown.

As described above, the chord data to be automatically reproduced is loaded into the chord data memory 9, and this reading operation is performed as follows. First, mode selector switch SW
＞ and SW2 is switched to the H side (1) IAY side), then the memory control circuit 13 receives the key-on pulse KONP or bar pulse SP via the OR gate 17 every time it is supplied to the read instruction input terminal (8). , the 7- address signals for the data memory are "+1" in order from the first write address.
The stored data at the memory address specified by this address signal is updated in a readable state.

Here, the key-on pulse K ON P is the output signal of the detection circuit 3 indicating that there are multiple pressed keys.
It is formed by differentiating at 6. That is,
If multiple key operations are performed while a melody is being played by operating one key at a time in playback mode,
Differentiator circuit 16 generates key-on pulse KONP.

On the other hand, the bar pulse sp is generated in the bar pulse generation circuit 20 based on the count output signal of the counter 19 that counts the tempo clock TCL output from the oscillator 18, and its period is equal to the time length of one bar. , and the pulse width is set to cover a predetermined time width centered on the timing of the bar boundary. Note that this measure pulse sp is needed when the beginning of a measure starts with a rest, such as the third measure in the score in Figure 2.3 Now, in the score in Figure 2, C, GV shown in .

Assuming that the chord data of GV, C, and C is stored in the memory 9, in order to produce the melody notes and chords shown in this score, first the key of "C" in the first measure must be pressed. At least two other keys with lower pitches than this key are simultaneously pressed 1. Then, the key-on pulse K ON P is output from the differentiating circuit 16 and the address signal output from the memory control circuit 13 is the first one. This specifies the memory address where the C chord data of the node is stored. As a result, the C chord data of the first measure is read out from the data memory 9. This C chord data is then supplied to the accompaniment tone forming circuit 12, where an accompaniment chord signal is formed. . In this case, the C chord data of the first bar is continuously output until the reading timing of the chord data of the next bar. Therefore, the accompaniment sound forming circuit 12
In this case, the chord signal formed in the circuit 12 is turned on and off at a cycle corresponding to the rhythm tone.

That is, the pattern memory 21 stores at each address a rhythm pattern signal for generating a predetermined rhythm sound and an on/off signal for turning on and off accompaniment sounds in accordance with the rhythm sound. When an address signal with a repetition period corresponding to a predetermined rhythm sound is input from the counter 19 that counts the TCL, a rhythm pattern signal for generating the rhythm sound is outputted, and
Outputs accompaniment tone on/off signal. The rhythm pattern signal is then supplied to the rhythm sound forming circuit 22, where a rhythm sound signal is formed. On the other hand, the accompaniment tone on/off signal is supplied to the accompaniment tone forming circuit 12. As a result, the chord signal formed based on the chord data is turned on and off by this on/off signal, and the amplifier 10
is supplied to the speaker 11 via. Further, the rhythm sound signal formed in the rhythm sound forming circuit 22 is also transmitted to the amplifier 1.
0 to the speaker 11. As a result, the accompaniment tone (
The reading operation of the 1° chord data is the same for the 2nd minor Mj, and the rhythm tone based on the rhythm pattern signal stored in the pattern memory 21 is produced from the speaker 11. This is done by simultaneously pressing the first melody G key and several other keys whose pitch is lower than this key. As a result, in the second measure, the G7 chord is sounded at 3 degrees, but in the third measure, since there is a rest symbol at the beginning of the chord, the measure pulse SP generated from the circuit 20 causes the G7 chord to be sounded in the memory. The address signal for 9 is updated. For this reason, the key of "Mi" next to the rest symbol is used by multiple other keys (
The G7 chord will now be sounded without pressing the keys at the same time (lower pitch keys).

On the other hand, the single note priority circuit 5 prioritizes and outputs only the highest note even if a melody key and another key with a low pitch are pressed at the same time to read chord data. The selector 4 selects the output of the single note priority circuit 5 in the reproduction mode.

Therefore, even if a melody key and another low-pitched key are pressed at the same time to read chord data, the melody tones are produced in accordance with the musical score.

Note that the single note priority circuit 5 may be configured to preferentially output only the lowest note. Furthermore, the content stored in the chord data memory 9 may be data for producing a duet sound or a counter melody sound as the second part, instead of data for producing a chord. Instead of using the keys on the keyboard section, other external data writing means may be used.

As is clear from the above description, the present invention is designed to generate musical tones based on control data stored in advance in a memory when a plurality of key press operations are performed on the keyboard section or under a friction condition. . Therefore, it is possible to produce musical tones based on °) and 7 control data with simple operations, and even beginners can easily combine the first melody performance sound with other spring sounds. This has the excellent effect of making it possible to produce musical tones.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an example of a musical score used for the spring spring operation. 1...Keyboard section, 3...Multiple key press detection circuit, 8...
・2... Melody sound forming circuit, 9... Chord data memory, 12... Accompaniment sound forming circuit. Patent applicant: Memoto Musical Instrument Manufacturing Co., Ltd. Agent: Masaki Yamakawa (one idiot)

Claims (1)

[Claims] a keyboard section; a multiple key press detection circuit for detecting that a plurality of keys have been pressed on the keyboard section; and a second musical tone signal different from the first musical tone signal corresponding to the pressed keys of the keyboard section. control data is stored in advance in the order of occurrence, and a first musical tone signal corresponding to a pressed key is generated based on a data memory that is read out every time an output of the plurality of keys pressed detection circuit occurs, and key information representing a pressed key of the keyboard section. and a musical tone forming circuit that forms a second musical tone signal based on the control data.