JPH0232635B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic musical instrument that performs automatic performance based on musical score data recorded on a musical score play card equipped with a recording medium such as a magnetic tape, and in particular,
When playing a chord part manually during automatic performance, only when a key is pressed correctly for the chord data on the play card, the chord name data or key press signal for this chord is used to read out the next chord name data or press a new key. The present invention relates to an automatic performance device for an electronic musical instrument that stores chord pronunciation data up to a certain point.

BACKGROUND OF THE INVENTION As a conventional electronic musical instrument, there is a known electronic musical instrument in which a series of chord data is stored and the keys are sequentially displayed for chord practice. Incidentally, this type of musical instrument stores key press information or key press chord information, and automatically plays accompaniment tones according to this stored information even after the key is released. For this reason, if a key is pressed incorrectly, the incorrect chord or bass note continues to be produced, which is an inconvenience.

Purpose of the Invention In view of the above-mentioned problems with the conventional type, an object of the present invention is to provide an electronic musical instrument that performs automatic performance based on musical score data, so that key press information or key press chord information is stored only when keys are pressed correctly. It is to make it. In order to achieve this object, the present invention provides a chord data storage device storing a series of chord data including chord name data and note length data indicating the performance section of this chord, and a means for sequentially reading out chord name data at timings according to the note length data; a keyboard having a plurality of keys and generating a key press signal representing a pressed key; and a chord name or chord name to be pressed based on the chord name data In an electronic musical instrument having chord instruction display means for displaying a key, a pressed-key chord comparison detects based on the key-pressed signal that a combination of keys corresponding to the chord name data has been pressed and generates a matching signal. storage means for storing the key press signal or chord name data when the matching signal is generated until the next chord name data is read out or until a new key press signal is generated; and chord signal generating means for generating a chord signal corresponding to the pressed key signal or chord name data.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described using the drawings. FIG. 1 shows the configuration of an electronic musical instrument according to an embodiment of the present invention. The electronic musical instrument shown in the figure has a rhythm tone automatic performance function that reads data recorded on a magnetic stripe 1a formed on a musical score 1 using a musical score data reading device 2, and automatically plays rhythm tones based on this read data. It has a chord instruction display function that indicates the chord to be played or a key to be pressed, and an automatic accompaniment tone performance function that automatically plays accompaniment tones such as chords and bass notes based on the read data or key press signals from the keyboard. ing.

The musical score data reading device 2 reads data recorded on the magnetic stripe 1a formed on the musical score 1, sends this read data to the memory 3, and reads data in the order of the data stored on the magnetic stripe 1a or the data recorded together with this data. Based on the synchronization signal, strobe signal, address signal, etc., address data to which the read data is to be written is created and sent to the write/read control circuit 4.

The write/read control circuit 4 controls writing of data to the memory 3 and reading of data from the memory 3, and includes an address counter. At the time of writing, this address counter is set with the address data output from the musical score data reading device 2, and the read data is written in the memory 3 at the address specified by this address counter.

The data written to the memory 3 includes chord data. This chord data consists of chord name data CD and note length data NL indicating the performance section of this chord, and the chord name data CD consists of root note data RT and chord type data CT.

The chord data stored in the memory 3 is read out according to the count value of the address counter of the write/read control circuit 4. This address counter is first reset when a start set switch (not shown) is turned on after reading and writing the data described above, and then increments each time the note length detection readout control circuit 5 generates a step signal NEXT, which will be described later. be done.

The note length detection readout control circuit 5 takes in the first chord name data CD1 and note length data NL1 generated from the memory 3 when the start set switch is turned on, and uses this chord name data CD1 for key press display and chord name display. In addition to latching output as the chord name data PCD, 1 is written to the built-in tempo counter.
Set the count value for beats. Thereafter, this tempo counter counts a tempo clock TCL, which will be described later. When this tempo counter counts the set value, that is, one beat, this control circuit 5
generates the first step signal NEXT1, and uses chord data CD1 as the chord to be played currently (current chord).
It latches and outputs the chord name data NCD as the chord name data NCD, and sets note length data NL1 indicating the performance section of the current chord in the tempo counter. Then this step signal
The second chord name data CD2 and note length data NL2 read out from the memory 3 according to the count value of the address counter incremented by NEXT1 are taken in. Next, when the tempo counter counts a value one beat less than the set value, that is, the note length data NL1, the display chord name data PCD is updated with new chord name data CD2. Furthermore, when the tempo counter counts the set value, that is, the first note length data NL1, the step signal NEXT is started as described above.
2, updates the current chord name data NCD with new chord name data CD2, and sets note length data NL2 in the tempo counter. After that, the step signal
The above operation is repeated every time NEXT occurs,
The chord data stored in the memory 3 is sequentially read out at timings determined by the tempo clock TCL and note length data NL. The read chord name data CD is then processed by the note length detection readout circuit 5.
As shown in Figure 2, the next step signal NEXT
One beat before the chord name is generated, it is output as display chord name data PCD, and then, in synchronization with the step signal NEXT, it is output as current chord name data NCD.
These chord name data PCD and NCD are each output for a period determined by note length data NL and tempo clock TCL, for example, one bar.

The tempo oscillator 6 is composed of a variable frequency oscillator, and generates a tempo clock TCL having a frequency according to the setting of an external variable resistor 6a.

The chord name display section 7 displays the chord name to be pressed, such as "C ₇ ", based on the display chord name data PCD.

The pressed key lamp 8 consists of a plurality of lamps that are provided corresponding to each key of the lower keyboard LK for accompaniment and are lit individually, and the pressed key display signal forming circuit 9 detects this chord based on the display chord name data PCD. The lamp corresponding to the key to be pressed to generate the message lights up.

In other words, the above chord name display and key press display are as follows.
The chord name data CD is output one beat before the current chord data NCD is output, and the performer can practice chord performance by pressing keys in accordance with these displays.

Note that this electronic musical instrument is provided with a single finger (hereinafter referred to as SF) mode and a finger chord (hereinafter referred to as FC) mode as chord key pressing modes. In FC mode, chords are produced according to the keys normally pressed. In addition, in SF mode, if you press only one key, a major chord with this key as the root note will be sounded, and if you press the root note and a black key on the bass side of this root note, a minor chord will be sounded, and the root note and this root note will be played. When a white key on the bass side of the note is pressed, a seventh chord is produced, and when the root note and the black and white keys on the bass side of the root note are depressed, a minor seventh chord is produced.

Therefore, if the chord name is the aforementioned "C ₇ ",
In SF mode, keys B and C are displayed as keys pressed,
Furthermore, in the FC mode, keys C, E, G, A or C, E, A are displayed as pressed keys.

The key switch 11 is an accompaniment keyboard, for example, a lower keyboard.
It consists of a large number of switches that correspond one-to-one with each key of LK, and a key press signal KON="1" is output from the switch corresponding to the pressed key.

A key press signal storage circuit 12 stores key press signals generated by the key switch 11 under the control of a memory control circuit 13.
KON is interrupted and temporarily stored. Also,
Generates any key-on signal AKO indicating that any key on the lower keyboard LK is being pressed.

The chord name detection circuit 14 is, for example, a conversion ROM,
Chord name data based on key press signals from memory circuit 12
Output KCD. This circuit 14 performs the opposite conversion to that of the key press display signal forming circuit 9.
Similarly, tables are provided for each chord key press mode SF and FC.

The memory control circuit 13 compares the chord name data KCD based on the key presses of the lower keyboard LK with the current chord name data NCD, and when they match, generates a hold signal HLD and presses the keys corresponding to this chord name data NCD. The key signal is stored in the key press signal storage circuit 12. Also, when the next chord is read from memory 3,
That is, when the note length detection readout control circuit 5 generates the step signal NEXT and when the any-key-on signal AKO is generated by pressing a key on the lower keyboard LK, the memory clear signal CLR is generated and the key press signal storage circuit 12 Clear the contents of.

The pattern generator 15 is a tempo clock TCL.
Based on this, a rhythm pattern pulse RP, base pitch data BN, and chord generation pattern pulse CP are generated in sequence.

The chord key data forming circuit 16 forms key data to be sounded, and when the chord key press mode is set.
When set to SF mode, two or three subordinate key data determined by the chord type data are added to the root note data RT of the chord name data KCD for 3 to 4 notes (C for C major, E,G,
For C ₇ , chord key data of C, E, (G), A) is generated. Further, when the chord key press mode is the FC mode, key data corresponding to each key press signal from the key press signal storage circuit 12 is formed.
This is so that when a key is pressed, the musical tone exactly as the key is pressed is produced. (For example, when you press D ₇ by mistake in Figure 2) In addition, even in the FC mode, the chord name data KCD output from the chord detection circuit 14
The chord key data may be formed based on the following. However, in this case, the chord name data is not used for keys pressed in a combination that cannot be detected as a chord by the chord detection circuit 14.
KCD is not generated, so there are cases where no sound is produced even though a key is pressed.

The chord sound forming circuit 17 includes a pattern generator 15
According to the timing of the chord generation pattern pulse CP generated at , musical tones for three to four tones indicated by the chord key data are formed, and a chord signal is generated by mixing these tones. This chord signal is sounded via the sound system 18.

The bass note key data forming circuit 21 includes bass pitch data BN and chord name data KCD generated from the pattern generator 15 at the timing of bass note generation.
The root note data RT is added to the root note, and the interval relationship specified by the base interval data BN (1 degree,
3rd, 5th, etc.) generates bass note key data. The bass tone forming circuit 22 forms a bass tone signal based on the bass tone key data. This series of bass musical tone signals is produced as, for example, a walking bass tone via the sound system 18.

The rhythm sound source 23 generates a rhythm sound signal with timing and instrument type based on the rhythm pattern pulse RP generated by the pattern generator 15.

The key switch circuit 25 generates key press data according to the key presses on the melody keyboard, for example, the upper keyboard UK, and the melody tone forming circuit 26 generates a melody sound signal from this key press data. These rhythm sound signals and melody sound signals are also generated via the sound system 18.

The device includes a device that generates pattern pulses, a device that forms chords, bass tones, and rhythm tones based on the pattern pulses, a melody keyboard, a key switch circuit, and a musical tone forming circuit, and generates melody tones in accordance with the performance of the melody keyboard. Since various well-known devices can be used as the device for forming the device, a detailed explanation of the configuration will be omitted in this specification.

(Detailed Operational Description of Main Parts of Embodiment) FIG. 3 shows detailed circuits of the key depression signal storage circuit 12, storage control circuit 13, and chord detection circuit 14, which are the main parts of the electronic musical instrument shown in FIG.

Next, the operation of the circuit shown in FIG. 3 will be explained.

When a key is pressed on the lower keyboard LK (FIG. 1), a key press signal KON="1" for each pressed key is provided in the key press signal storage circuit 12 in one-to-one correspondence with each key. Input terminals 31, 31-1, 31-2, ...,
31-n, and is further supplied to OR circuits 32, 3
2-1, 32-2, ..., 32-n and a delay circuit, for example, a shift register 3 with one stage and one bit.
3, 33-1, 33-2, . . . , 33-n to the chord name detection circuit 14. In the circuit 14, the key press combination detection circuit 34 receives this key press signal.
A key combination that generates KON="1" is detected and chord name data consisting of root note data and chord type data is generated. In addition, the highest key detection circuit 35
detects the highest note among the pressed keys and generates the key data of this key as root note data.
Further, the white/black key detection circuit 36 detects a pressed key other than the highest key, and if the key is a black key, a minor signal = "1" is generated, and if the key is a white key, a seventh signal = "1" is generated. ” occurs.

If the FC mode is selected as the chord key press mode, the selector 37 selects the A input and uses the output of the key press combination detection circuit 34 as the key press chord name data.
Output as KCD. Also, in SF mode,
Select the B input, and use the chord name data obtained by adding 2 bits of chord type data for minor and seventh from the white/black key detection circuit 36 to the root note data output from the highest key detection circuit 35. data
Output as KCD. This chord name data KCD is supplied to the storage control circuit 13.

The comparison circuit 38 uses this pressed key chord name data KCD.
and the current chord name data NCD supplied from the note length detection readout control circuit 5 (FIG. 1), and if they match, a match signal EQ="1" is generated. The flip-flop 39 is set by this coincidence signal EQ="1" and generates a key press signal holding signal HLD="1".

If you release the key in this state, all key press signals KON
The output of the OR circuit 40 which inputs the input signal, that is, the any key-on signal AKO, becomes "0", and on the other hand, the step signal NEXT is also "0", so the NOR circuit 4
The clear signal CLR output by 1 becomes "1".
Therefore, the AND circuit 42 (42-1, 42-2,
..., 42-n) has a holding signal at its first input terminal.
HLD="1" is supplied to the second terminal, and the clear signal="1" is supplied to the delay circuit 3.
A closed loop is formed in which the output of No. 3 is fed back to the delay circuit 33 via the AND circuit 42 and the OR circuit 32, and the key depression signal KON is cyclically stored in this feedback loop.

Next, when the note length detection readout control circuit 5 (Fig. 1) generates the step signal NEXT="1", or when any key is pressed, an any key on signal is generated.
When AKO becomes "1", the flip-flop 39 is reset via the OR circuit 43, and therefore the hold signal HLD becomes "0" and
Since the OR circuit 41 generates the clear signal = "0", the feedback loop is cut off by the AND circuit 42, and therefore the memory of the key press signal KON is cleared. In addition, any key on signal AKO=
"1" is configured to reset the flip-flop 39 at the rising edge via the differentiating circuit 44.

If a key is pressed that is different from the key pressed display, the pressed key chord name data KCD does not match the current chord name data NCD, and no coincidence signal EQ is generated. Therefore, the flip-flop 39 remains reset at the rising edge of the key press signal KON, that is, the any key on signal AKO="1", and is not set, and the hold signal HLD remains "0".
Therefore, the key press signal KON after key release is not stored.
However, while the key is being pressed, the OR circuit 32 and delay circuit 33
or further via the highest key detection circuit 35, selector 37, etc.
(in FC mode) or this pressed key chord name data
Since the KCD (in the SF mode) is supplied to the chord key data forming circuit 16 (FIG. 1), a chord is generated according to the pressed key.

In addition, in the above embodiment, the coincidence signal EQ=
The key press signal and the chord name data when "1" is generated are equivalent. Therefore, chord name data may be stored instead of the key press signal.

As described above, according to the present invention, when a key is pressed correctly for chord name data, that key press signal or chord name data is memorized, and from then on, the key press signal or chord name data is stored, and from then on, the key press signal or chord name data is The chords will be played automatically according to the rhythm pattern until a new key is pressed. Therefore, by pressing the key for a moment only when the chord changes, the chord is automatically produced thereafter without the need to continue pressing the key. Therefore, for example, if you are practicing playing a melody at the same time as playing this chord, you only need to press the key for a moment as shown above, so you can concentrate on playing the melody until the next chord change, and it is easy for the practitioner to play the chord. Easy to practice.
On the other hand, if a key is pressed incorrectly, the system will only produce sound according to the key press and rhythm pattern while the key is being pressed (FC mode), or will not produce chords or bass notes. The bass note is never produced continuously.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an electronic musical instrument according to an embodiment of the present invention, FIG. 2 is a timing chart of signals of various parts of the electronic musical instrument of FIG. 1, and FIG. 3 is a main part of the electronic musical instrument of FIG. 1. FIG. 2 is a detailed block configuration diagram of FIG. 1... Sheet music, 1a... Magnetic stripe, 2...
Musical score data reading device, 3... memory, 4... writing/reading control circuit, 5... note length detection reading control circuit, 7... chord name display device, 8... key press lamp,
9... Key press display signal forming circuit, 11... Key switch, 12... Key press signal storage circuit, 13... Memory control circuit, 14... Chord name detection circuit, 34... Key press combination detection circuit, 35... ...Highest key detection circuit, 3
6... White/black key detection circuit, 38... Comparison circuit,
LK...lower keyboard.

Claims (1)

[Scope of Claims] 1. A chord data storage device storing a series of chord data including chord name data and note length data indicating the performance section of the chord, and a chord data storage device that stores a series of chord data including chord name data and note length data indicating the performance section of the chord, and a predetermined tempo and the note length data from this storage device. a reading means for sequentially reading chord name data at a timing according to the chord name data; a keyboard having a plurality of keys and generating a key press signal representing a pressed key; and displaying a chord name or a key to be pressed based on the chord name data. in the electronic musical instrument, the electronic musical instrument has a chord instruction display means for detecting, based on the key press signal, that a combination of keys corresponding to the chord name data has been pressed, and generating a matching signal; a storage means for storing the key press signal or chord name data when the matching signal is generated until the next chord name data is read out or until a new key press signal is generated; 1. An automatic performance device for an electronic musical instrument, comprising: chord signal generating means for generating a chord signal corresponding to a key signal or chord name data. 2. The reading means takes in the chord name data a predetermined time before the timing according to the note length data and sends it to the display instruction means,
An automatic performance device for an electronic musical instrument according to claim 1, which outputs the chord name data as read data at a timing according to the note length data.