JPS5828789A - 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 musical tone data for generating musical tones.

Conventionally, a memory is provided that stores musical tone data for generating musical tones, and the musical tone data is read out from this memory in conjunction with the performance operation on the keyboard section, and based on the read content, the first musical tone data according to the performance operation on the keyboard section is A second tone signal different from the musical tone signal of
There is an electronic musical instrument that generates musical tone signals.

However, in the past, a dedicated key was provided to read control data from memory, which caused the problem of complicated performance operations.

This invention was made in view of the above problems, and its purpose is to read musical tone data stored in a memory with a simple operation, and based on this read content, to generate the first musical f signal by playing the keyboard part. An object of the present invention is to provide an electronic musical instrument that can generate different second musical tone signals in parallel.

To this end, in the present invention, musical tone data is read from the memory and a second musical tone signal is generated each time a key operation for generating the w, 1 musical tone signal is performed on the keyboard section.

Hereinafter, the present invention will be described in detail based on the illustrated embodiments.

FIG. 1 is a block diagram showing one embodiment of the present invention. In this embodiment, chord data for accompaniment is stored in a memory, and chords based on this chord data are played by playing operations on the keyboard. It is good to apply to things that are pronounced along with sounds.

In FIG. 1, a keyboard section 1 has a plurality of keys, and when any key is pressed, the pressed key is detected by a detection operation of a key press detection circuit 2. As shown in FIG. When the pressed key detection circuit 2 detects a pressed key on the keyboard section 1, it outputs key data corresponding to the pressed key. In this embodiment, the apertures of the keyboard section 1 are normally suppressed one key at a time for playing melody tones.

When chord data is to be stored in a chord data memory 6 (described later) using the keys of the keyboard section 1, a plurality of keys corresponding to the chords are pressed at the same time. In response to such a suppression operation, the pressed key detection circuit 2 outputs single or plural key data KD corresponding to the pressed key.

This key data KD is supplied to an OR gate 4 that detects whether any key is pressed on the keyboard section 1, and is also supplied to a chord bubble detection circuit 3. Furthermore, it is also supplied to the melody sound forming circuit 5.

When any key is pressed on the keyboard section 1, the OR gate 4 displays any key on AKON ('
1. Output signal). This Any Key On What Month AK
ON is inverted by an inverter 8 and guided to a differentiation circuit 9, where a differentiation signal is formed. The differentiating circuit 9 is configured to output a differential signal when the input frequency changes from 90# to Sl 1 N (1-). Therefore, the differential signal is output from the differential circuit 9 at the timing when all the pressed keys on the keyboard section 1 are pressed 11f.

This differential signal is supplied as a key-off pulse K OF P to the input command signal input terminal W of the memory control circuit 10, and is used as a chord data write command.

When the three chord bubble detection circuits are used to store chord data in the memory 6 and the keyboard section 1 performs a suppression operation for the double (evening) key and 'O' is supplied to a plurality of key data, this key data is It detects which chord it corresponds to, such as C, G, etc., generates chord data (data indicating the root note and butaf indicating the type of chord such as a minor chord) corresponding to the applicable chord, and Supply to chord data memory 6〇Meanwhile, when the melody sound forming circuit 5 is supplied with key data KD according to the melody playing operation on the keyboard section 1, it forms a melody sound signal based on this key data KD. , this melody sound signal is supplied to the speaker 12 via the amplifier 11', and the melody sound is generated from the speaker 12.

The chord data memory 6 stores the chord data output from the chord bubble detection circuit 3 in the recording mode to the memory control circuit 10.
The stored contents are sequentially stored in accordance with the address signal from the memory control circuit 10 in the playback mode and supplied to the accompaniment tone forming circuit T. This is how it is done. That is, the mode changeover switch SWl
is switched to the storage side (CREC side). Then, the memory control circuit 10 enters the convolution operation mode and updates the address signal for the data memory 6 by "+1" each time the key-off pulse KOFP is supplied from the differentiating circuit 9, and updates the memory address specified by this address signal. >0 sound data can be written to.

Thereupon, a plurality of key tones corresponding to the tone data to be stored are sequentially suppressed in units of one chord. Then, due to key suppression, the OR gate 4 outputs a Mizuko any key/signal AKON (11" signal) indicating that any key has been pressed. Then, when the key of the ) fEl sound is released, the differential circuit 9 A key-off pulse KOFP is output from.At this time,
Audio data is supplied to the data input of the Japanese box data memory 6 from the detection circuit 3.

As a result, the chord data corresponding to the chord key pressed on the keyboard section 1 becomes the iIi! ' is stored in the chord data memory 6. When writing of one chord data is completed, the address signal for the memory 6 is updated by "+1" and specifies the storage address of the next chord data. If there is a song, for the first measure, press the key of the F chord in a one-to-one correspondence with the melody notes and rests, and in the same way for the second measure, press the key of the chord of C, C, Press the key. Thereafter, the chord data is stored in the memory 6 in the order of occurrence by pressing the chord keys in the same manner.

As described above, chord data to be automatically reproduced is written into the chord data memory 6, and this reading operation is performed as follows. First, mode selector switch 8W1
Switched to the playback side (PI, AY side). Then, each time the key-on pulse KONP or bar pulse sp is supplied to the read instruction input terminal @) via the OR gate 15, the memory control circuit 10 updates the address signal for the data memory 6 by "+1" in order from the first write address. However, the key-on pulse KONP makes the stored data at the memory address specified by this address signal readable, and the key-on pulse KONP generates an any-key-on signal AKON indicating that any key on the keyboard section 1 has been pressed.
010,000, which is formed by differentiating in the differentiating circuit 14, the bar pulse SP is formed in the bar pulse generating circuit 16 based on the count output signal of the counter 18 that counts the tempo clock TCLi output from the oscillator 11. The 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 tiling of the bar boundary. This is necessary when the beginning of a measure starts with a rest, such as the first measure in the musical score shown in Figure 2.

Now here, F and C shown in the score in Figure 2.

Assuming that the chord data of G7#"#... is stored in the memory 10, the beginning of the measure for measure llX1 is a rest, so the chord data is stored in the memory 6 by the measure pulse SP.
The address signal for the memory control circuit w11 is updated.
The address signal output from Q specifies the memory address where the first OF chord data is stored.As a result, the first OF chord data of measure m1 is transferred from data memory 6. is read out. This F chord data is then supplied to an accompaniment tone forming circuit T, where an accompaniment chord signal is formed. In this case, the first F chord data is continuously output until the reading timing of the F chord data corresponding to the next melody note.

Next, key operations are performed in sequence according to the melody notes following the rest symbol. Then, each time a key is pressed by this key operation, a key-on pulse KONP is output from the differentiation circuit 14, and an address signal output from the memory control circuit 10 sequentially specifies chord data F corresponding to each note for each melody. Become something to do.

As a result, the chord data of F is sequentially read out from the chord data memory 6 according to the operation of the melody key, and is supplied to the accompaniment tone forming circuit T.

As a result, in the first measure, an F chord signal is continuously formed in the circuit T and is sounded from the speaker 12.

In this case, the chord signal formed at wI7 is turned on and off at a period corresponding to the rhythm tone.

That is, the butter/memory 19 stores at each address a rhythm pattern signal for generating a predetermined rhythm sound and an on/off signal for turning on/off the accompaniment sound in accordance with the rhythm sound. Clock TCL'i
When an address signal with a repetition period corresponding to a predetermined rhythm sound is inputted from the counting ring 18, it outputs a rhythm butter/signal for generating the rhythm sound, and also outputs an on/off signal for the accompaniment sound. . Then, the rhythm butter/signal ti IJ rhythm sound forming circuit 20 is supplied, where a rhythm sound signal is formed.

- 10,000, the accompaniment tone on/off signal is supplied to the accompaniment tone forming circuit T. Thereby, the chord signal formed based on the chord data is turned on and off by this on/off signal and is supplied to the speaker 12 via the amplifier 11.

Further, the rhythm sound signal formed in the rhythm sound forming circuit 20 is also supplied to the speaker 12 via the amplifier 11. As a result, an accompaniment tone (chord) based on the chord data stored in the data memory 6 and a rhythm tone based on the rhythm pattern signal stored in the pattern memory 19 are emitted from the speaker 12.

The chord data reading operation is performed in the same manner for the second measure and each measure thereafter.

Note that the contents stored in the chord data memory 6 may be data for producing a duet sound or a counter melody sound as the second part, instead of data for producing a chord. Furthermore, data may be stored in the memory 6 by using other external data storage means instead of using the keys on the keyboard section.

As is clear from the above description, the present invention is capable of generating musical tones based on control data stored in advance in a memory. This is done according to the conditions. Therefore, it is possible to generate musical tones based on the control data with a simple operation, and even beginners can generate musical tones by combining the first melody performance sound with other performances and musical tones. It has an excellent effect 0

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating the present invention, and FIG. 2 is a diagram illustrating an example of a musical score used for performance operations. 1. Keyboard section, 5.. Melody sound forming circuit, 6.
...Fist chord data memory, T...e11 accompaniment tone formation circuit. Patent applicant: Nippon Musical Instruments Co., Ltd. Agent Masaki Yamakawa (and 1 other person)

Claims (1)

[Claims] A keyboard section and musical tone data for generating a second musical tone signal different from the first musical f signal corresponding to the pressed key of this keyboard section are stored in advance in the order of generation, and this stored musical tone data is used as the first musical tone. a data memory which is sequentially read out by the pressed keys of the keyboard section for generating a signal; and a fourth musical tone signal corresponding to the key data corresponding to the pressed keys of the keyboard section; An electronic musical instrument comprising: a musical tone forming circuit that forms a second musical tone signal corresponding to the read musical tone data.