JPS5990894A - Automatic performer for 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 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 equipped with a recording medium such as a magnetic tape, and particularly relates to an electronic musical instrument that performs automatic performance based on musical score data recorded on a musical score equipped with a recording medium such as a magnetic tape. The present invention relates to an automatic performance device for an electronic musical instrument that stores chord data or a key press signal only when a key is correctly pressed for chord data on a play card when playing manually.

BACKGROUND OF THE INVENTION Conventional electronic musical instruments store a series of chord data.
It is well known that the user can practice chords by displaying keys to be pressed in sequence. 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. Therefore, if you press a key by mistake,
There was an inconvenience that incorrect chords and bass notes were continuously pronounced.

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 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 chord data including chord name data and note length data indicating the performance section of the chord, and An electronic musical instrument having a reading circuit that sequentially reads chord name data at timings according to the note length data, and a chord instruction display means that displays a chord name or a key to be pressed based on the chord name data. A keyboard that generates a key press signal representing a key press.

a pressed key first note comparison means that generates a matching signal when a combination of keys corresponding to the chord data is pressed; and a pressed key that stores the key pressed signal or the chord data when the matching signal is generated. The present invention is characterized by comprising a key signal storage means and a chord signal generation means for generating a chord signal corresponding to the stored key press signal or the chord data.

DESCRIPTION OF EMBODIMENTS The present invention will be described in detail below with reference to 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 magnetic stripe 1 formed on a musical score 1.
The recorded data of a is read by the musical score data reading device 2, and based on this read data, the rhythm sound automatic play function automatically plays the rhythm sound, and the chord that instructs the chord to be played next or displays the key to be pressed. It has an instruction display function and an automatic accompaniment tone performance function that automatically plays accompaniment tones such as chords and bass tones based on the read data or key press signals from the keyboard.

The musical score data reading device 2 reads data recorded on the magnetic stripe ia formed on the musical score 1, sends this read data to the memory 3, and also reads the data recorded on the magnetic stripe ia formed on the musical score 1.
Address data to which the read data is to be written is created based on the order of data stored in the data or a synchronization signal, step signal, address signal, etc. recorded together with this data, and is 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 stored in 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 tie 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 to be described later. be done.

The note length detection readout control circuit 5 reads the first chord name data C generated in the memory 3 when the start set switch is turned on.
It takes in DI and note length data NLI, latches and outputs this chord name data CDI as a chord name PCD for displaying key presses and chord names, and sets a count value for one beat in a built-in tempo counter. Thereafter, this tempo counter counts a tempo clock TCL, which will be described later. When the tempo counter counts the set value, that is, one beat, the control circuit 5 generates the first step signal NEXTI and outputs the chord data CD.
Chord name data NC of the chord (current chord) that should currently pronounce I
D is latched and output, and note length data NLI indicating the performance section of the current chord is entered into the tempo counter. Next, the second chord name data CD2 and note length data NL2 are read out from the memory 3 according to the count value of the address count incremented by this step signal NEXT1.
Incorporate. Next, when the tempo counter counts a value one beat less than the set value, that is, the note length data NLI, the displayed harmonic 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 NLI, it generates the step signal NEXT2 as described above, and the current chord name data NC
D is updated with the new note name data CD2, and the note length data NL2 is added to the tempo counter by 71-. Thereafter, the above-described operation is repeated every time the step signal NEXT is generated, and the chord data stored in the memory 3 is sequentially read out at a timing determined by the tempo counter TCL and the note length data NL. And this read chord name data C
As shown in FIG. 2, D is output in advance as display chord name data PCD by the note length detection/readout circuit 5 one beat before the next step signal NEXT is generated, and then in synchronization with the step signal NEXT. It is output as affinity 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 the external flexible refractor 6a.

The chord name display section 7 displays the chord name to be pressed, such as "C7", based on the display chord name data PCD.

The pressed key lamp 8 consists of a plurality of lamps that are provided corresponding to the key keys of the lower keyboard LK for accompaniment and are lit individually. lights up the lamp corresponding to the key to be pressed to produce the sound.

In other words, the above chord name display and key press display differ by 1 even though the chord name data CD is output as the current chord data NCD.
The player can practice playing chords by pressing the 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 moderated fingered chord (hereinafter referred to as FC) mode as chord key pressing modes. F
In the C mode, chords are produced according to the keys normally pressed. Also, 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 lower than this root note, a minor chord will be sounded, and the root note and this key will be the root note. When a white key on the bass side of the root 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 above-mentioned "C7", the keys of B and C are displayed in SF mode, and the keys of C, E, G, A or C, E, A are displayed in FC mode. Displays the key press.

The key switch 11 is composed of a large number of switches in one-to-one correspondence with the duplicate keys of the accompaniment keyboard, for example, the lower keyboard LK, and receives a key press signal KON-"1" from the switch corresponding to the pressed key.
Output.

The key press signal storage circuit 12 relays and temporarily stores the key press signal KON generated by the key switch 11 under the control of the storage control circuit 13. It also generates an any-key-on signal AKO indicating that any key on the lower keyboard LK is being pressed.

The chord bubble detection circuit 14 is, for example, a conversion ROM, and outputs chord name data KCD based on the key press signal from the storage circuit 12. This circuit 14 performs the opposite conversion to that of the key press display signal forming circuit 9, and similarly converts each chord key press mode SF.
There is also a table for FC.

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

The Q turn generator 15 sequentially generates the rhythm no ξ Kuhn/Qrus HP and the bass pitch take B\chord generation pattern pulse CP based on the tempo clock TCL.

The chord key data forming circuit 16 forms key data to be produced, and when set to the chord key press mode or the SF mode, the chord key data forming circuit 16 forms the root note data R of the chord name database KCD.
Add two or three subordinate key data determined by the chord type data to T, and add 3 to 4 notes (C, E, G for C major).

If C7, generates chord key data of C, E, (G), A) 0 Also, when in chord key press mode or FC mode, corresponds to each key press signal from key press signal storage circuit 12 Form key data. This is so that when a key is pressed, the musical tone exactly as the key is pressed is produced. (The example in Figure 2 is when you press the key D7 by mistake.)
In the case of the chord key data may also be formed based on the chord name data KCD output from the chord detection circuit 14.

However, in this case, the chord name data KCD is not generated for a combination of pressed keys that cannot be detected as a chord by the chord detecting circuit 14, and therefore, there may be cases where no sound is produced even though the pressing hook 2 is present.

The chord sound forming circuit 17 generates the chord generation pattern ? According to the timing of the pulse CP, musical tones of 3 to 4 tones indicated by the chord key data are formed, and a chord signal is generated by mixing these musical tones. This chord signal is sounded via the →Inu Tsundo system 18.

The bass note key data forming circuit 21 is a ?? A special number is generated from the turn generator 15 to produce the bass note.Base pitch data BN and the root note data R of the chord name database KCD.
T is added to generate base tone key data having an interval relationship (1st, 3rd, 5th, etc.) specified by the pace interval data BN with respect to the root note.

The bass tone forming circuit 22 forms a bass tone signal based on the bass tone key data. This series of bass 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 7g turn/Qrus RP generated by the pattern generator 15.

The key switch circuit 25 is connected to a melody keyboard, for example, an upper keyboard U.
The melody musical tone forming circuit 26 generates key depression data according to the key depression in K, and generates a melody sound signal from this key depression data. These rhythm sound signals and melody sound signals are also generated via the sound system 18.

In addition, in this way, (a device that generates a + turn pulse,
This is a well-known device that forms chords, bass tones, and rhythm tones based on the /♀turn/Qrus, as well as a device that includes a melody keyboard, a key switch circuit, and a musical tone forming circuit, and forms melody tones according to the performance of the melody keyboard. Since various configurations can be used, 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 Lx (FIG. 1), a key press signal KON="1'" for each pressed key is provided in the key press signal storage circuit 12 in a one-to-one correspondence with the duplicate keys. Input end 31
(31-1, 31-2,...

ai-n), and is further supplied to the OR circuit 32 (32-
1, 32-2, ..., 32-11) and delay circuits.
-1, 33-2, . . . , 33-n) to the chord detection circuit 14. In the circuit 14, the key press combination detection circuit 34 detects the key combination generating the key press signal KON-"1" and generates a chord name database consisting of root note data and chord type data. Further, the highest key detection circuit 35 detects the highest pitch of the pressed hammers and generates key data of this key by using the root note data. Furthermore, the white/black key detection circuit 36 detects a key being pressed other than the highest key, and if the key is a black key, it generates a minor signal 2++1u, and if it is a white key, it generates a minor signal 2++1u, and if it is a white key, it generates a sev]/su signal -. “,
Generate u.

If the FC mode is selected as the chord key press mode, the selector 37 selects the A input and activates the key press combination detection circuit 3.
The output of step 4 is output as pressed key chord name data KCD. In addition, in SF mode, the B input is selected and the root note data output from the highest key detection circuit 35 is used by the white/black key detection circuit 36.
Chord name data obtained by adding 2 bits of minor and seventh chord type data to the pressed key chord name data KC
Output as D. This chord name data KCD is supplied to the storage control circuit 13.

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

When the key is released in this state, the OR circuit 40 which receives all the key press signals KON outputs an any-key-on signal A.
KO becomes °゛0'', while step signal NEXT
Since both are II OII, the clear signal CLR output from the NOR circuit 41 becomes '1''.

Therefore, the AND circuit 42 (42-1, 42-2).

..., 42-n), the holding signal H is input to the first input terminal of the
LD-"1" or the second terminal has a clear signal CLR-"
1''' is supplied, and the output of the delay circuit 33 is passed through the AND circuit 42 and the OR circuit 32 to the delay circuit 3.
3 is formed, and the key press 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 and the any key on signal AKO or 1°' is generated, Flip-flop 3 via OR circuit 43
9 is reset, and therefore the hold signal HLD is '0''
At the same time, the OR circuit 41 clears the clear signal CLR="
In order to generate 0″′, the above feedback loop is connected to the AND circuit 4.
2, and thus the memory of the key press signal KON is cleared. Furthermore, any key on signal AKO=“1”
is passed through the differentiating circuit 44 to the flip-flop 3 at the rising edge.
9 is reset.

When a key is pressed that is different from the key pressed display, the pressed key chord name data KCD and the current chord name data NCD (!: do not match and the match signal EQ is not generated. Therefore, the flip-flop 39 outputs the key pressed signal KON, that is, any key ON). Signal AKO
Since it remains reset at the rising edge of 2"1" and is not set, and the holding signal HLD is "0", the key press signal KON after key release is not stored. However, while the key is pressed, OR circuit 3
2 and the delay circuit 33, or further via the highest key detection circuit 35 and selector 37, etc., the pressed key data KON (in FC mode) or the pressed key chord name data K
CD (SF Momo Temporary) is chord key data forming circuit 16 (
(Fig. 1), the chord corresponding to this key depression is produced.

As described above, according to the present invention, when a key is pressed correctly for the chord data, the chord is automatically played according to the interval and rhythm/e turn determined by the note length data.
If the key press is incorrect, the key press and rhythm/? are performed only while the key is being pressed. Sound according to the turn (FC mode)
, or chords and bass notes, so incorrect chords and bass notes will not be continuously pronounced.

[Brief explanation of drawings]

FIG. 1 is a block configuration diagram of an electronic musical instrument according to an embodiment of the present invention, FIG. 2 is a timing chart of signals of each part of the electronic musical instrument of FIG. 1, and FIG. 3 is a female part of the electronic musical instrument of FIG. 1. FIG. 2 is a detailed block configuration diagram of FIG. 1... Music score, 1a... Magnetic stripe, 2... Music score data reading device, 3...
...Memory, 4...Write/read control circuit,
5...Mark length detection readout 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...take amount key detection circuit, 36...
・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 from this storage device. In an electronic musical instrument that has a reading circuit that sequentially reads out chord name data at a timing according to the data, and a chord instruction display means that displays the chord name or the key to be pressed based on the chord name data, a pressed key indicating a pressed key is used. a keyboard that generates a signal; a pressed-key chord comparing means that generates a matching signal when a combination of keys corresponding to the chord data is pressed; 1. An automatic performance device for an electronic musical instrument, comprising: a key press signal storing means for storing the key press signal; and a chord signal generating means generating a chord signal corresponding to the stored key press signal or the chord data. 2. The automatic performance device for an electronic musical instrument according to claim 1, wherein the key press signal storage means reads the next chord and clears the memory. 3. The automatic performance device for an electronic musical instrument according to claim 1, wherein the key press signal storage means is memory-cleared by a new key press.