JPH0115073B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic keyboard musical instrument having an automatic accompaniment function such as an electronic organ, and more particularly to a keyboard instrument that can store both melody data during performance and chord data generated by automatic accompaniment. .

In recent years, attempts have been made to equip keyboard electronic musical instruments such as electronic organs with performance data storage devices, and display or print musical scores based on the stored data, or have them perform automatically.

However, conventional electronic keyboard instruments of this type generally store only the melody data of the performance data, so even if the musical score is displayed or printed based on the stored data, no data related to the accompaniment is stored. It was inconvenient because it wasn't shown, and even when it was played automatically, there was no accompaniment, so it sounded different than when it was actually played.

Therefore, the easiest way to store accompaniment data is to use an electronic keyboard instrument with an automatic accompaniment function, for example, when playing a single finger chord.
It is conceivable to include an accompaniment and store data indicating the name of each chord along with the melody data.

In this way, based on the stored data, it will be possible to display or print musical scores with chord names as shown in Figure 1 A and B, or to perform automatic performances with accompaniment. Become.

However, in that case, in addition to making it possible to store melody data and chord data, the automatic accompaniment circuit also has a single-finger function that allows chords to be played by pressing a key with one finger. Since a minimum number of operations are required to designate a chord performance, the operations are troublesome, and there is a problem that chord data may not be stored if an operation is forgotten.

This invention provides an electronic keyboard musical instrument equipped with an automatic accompaniment circuit that has an automatic bass chord function such as a single finger chord or a finger chord. The purpose is to make it possible to store both data and data.

Therefore, the keyboard electronic musical instrument according to the present invention has pitch/note length data storage means for sequentially storing pitch data and note length data as melody data based on key data from the keyboard, and chords generated from an automatic accompaniment circuit. A melody memory switch and an auto bass chord memory switch are provided for sequentially storing chord data indicating the name of the user, a melody memory switch and an auto bass chord memory switch for respectively setting both of these memory units in a memorizable state. When the simple operation switch is operated, a signal that enables both of the above storage means to be stored regardless of the states of the melody memory switch and auto bass chord memory switch, and a specific automatic accompaniment function predetermined in the automatic accompaniment circuit. The above object is achieved by providing a switch signal processing circuit that generates a signal specifying the .

Embodiments of the present invention will be described below with reference to the accompanying drawings from FIG. 2 onwards.

FIG. 2 shows the external appearance of a desk-top printer-equipped keyboard electronic musical instrument as an embodiment of the present invention. On the top side of the main body, there is a right-hand keyboard section 1R for playing melodies and a left-hand keyboard section 1L for playing chords. The apparatus includes a keyboard 1 with continuous keys, a speaker 2 for generating performance sounds, and a printer 3 for printing musical scores.

Then, the rear panel surface 4 of keyboard 1 and speaker 2
These include a transpose select knob 5, a master volume 6, a melody memory switch 7a, a melody memory off switch 7b, a melody play switch 7c, an auto bass chord (abbreviated as "ABC") memory switch 8a, and an ABC memory off switch. 8b, ABC play switch 8c,
ABC volume 9, duet for adding overtones
switch 10, single finger chord switch 11 to enable chord performance by pressing one finger on the left hand keyboard section 1L, variation switch 12, arpeggio volume 13
(When set to the minimum, arpeggio switch 13, which will be described later)
Rhythm volume 14, tempo volume 15 related to automatic rhythm performance, synchronized start switch 16 for starting rhythm generation in synchronization with pressed keys, switch group 17 for rhythm selection, tone related A sustain switch 18, a tone color selection switch group 19, and a power switch 20 are provided.

Further, on the front panel surface 21 of the printer 3, there are a simple operation switch 22, a print standby switch 23, a start/stop switch 24, a flat input switch 25, a sharp input switch 26, and a release button 27. It is provided.

FIG. 3 is a block circuit diagram showing an overview of the circuit configuration of this electronic keyboard instrument with a printer, and shows switch signal processing for enabling performance data to be stored with a single touch using the simple operation switch 22, which is a feature of the present invention. Only circuit 30 is shown in detail.

31 is a music formation circuit, keyboard 1
The internal circuitry inputs key data KD generated in response to key operations, and forms a musical tone signal using pitch data and key press/release data based on the presence or absence of pitch data.
The musical tone signal is input to an amplifier 33 via a mixing circuit 32, amplified, and converted into sound by the speaker 2.

34 is a performance data processing device which inputs the key data KD from the keyboard 1 and uses the pitch data and note length data corresponding to the duration of the key data to convert the performance data of the melody into notes constituting the musical score. This device stores data indicating rests, etc., the details of which will be described later.

35 is an automatic accompaniment circuit with an auto bass chord function, which outputs each output of the switch signal processing circuit 30, the left hand keyboard section 1L in FIG. 2, ABC volume 9, arpeggio volume 13, rhythm volume 14, tempo volume 15, and rhythm. A signal from the selection switch group 17, etc. is input, a chord tone signal is automatically generated in the selected rhythm, and is outputted to the amplifier 33 via the mixing circuit 32.
It is acoustically converted by the speaker 2 along with the above-mentioned musical tone signal (mainly melody tone).

Reference numeral 36 denotes a chord data storage circuit as a chord data storage means for inputting chord data indicating chord names from the automatic accompaniment circuit 35 and sequentially storing the input chord data.

The printer 3 includes the aforementioned performance data processing device 34.
The melody data including pitch data and note length data is read out from the melody data storage circuit 36, the chord data is read out from the chord data storage circuit 36, and the performance results are stored in a staff notation as shown in FIG.
etc.) on print paper and create a musical score.

Furthermore, although not provided in the example of FIG. 2, a musical score display 37 using a liquid crystal pattern or LED may be provided to display performance data as a musical score.

38 is an automatic performance device, and when the melody play switch 7C and the ABC play switch 8C shown in FIG. 2 are turned on, the performance data storage device 34
The pitch data and note length data are sequentially read out from the chord data storage circuit 36, and the chord data is sequentially read out from the chord data storage circuit 36 for automatic performance.

39 is a clock generator consisting of an oscillation circuit and a frequency dividing circuit, which generates an extremely high frequency reference pulse φ ₀
Then, a clock pulse _φ1 obtained by appropriately dividing the frequency and a clock pulse _φ2 obtained by further dividing the frequency by two are output.

The frequency divider 40 further divides the clock pulse φ ₂ from the clock generator 39 to generate a tempo clock TCL and a code length count pulse with a period n times that of the tempo clock TCL (corresponding to the minimum code length to be detected).
Output nTCL.

The tempo clock TCL is input to the automatic accompaniment circuit 35 and becomes a rhythm reference signal. Other clock pulses φ ₀ to φ ₂ and clock pulse ₂ obtained by inverting clock pulse φ ₂ by inverter IN.
are used to control various operations of the performance data storage device 34.

The switch signal processing circuit 30 is a toggle type flip-flop circuit (hereinafter referred to as "T
-FF) 41, a one-shot multi 42 that pulses its Q output, and two set-reset flip-flops (hereinafter referred to as "R-SFF").
) 43, 44, AND circuits 45 to 49 each equipped with an inverter at one input terminal, OR
It is composed of circuits 50 to 54.

The initial clear signal IC becomes high level "1" for a short time when the power switch 20 shown in FIG.
Reset 4.

In addition, melody memory switch 7a and
The ABC memory switch 8a is locked in that state when the push button is pressed to turn it on, and is unlocked and turned off when the off switches 7b and 8b are turned on, respectively.

The single finger chord switch 11, auto arpeggio switch 13S, and duet switch 10 are all push-on/push-off type switches.

In order to store performance data with chord accompaniment using this electronic keyboard instrument in normal operation, at least the melody memory switch 7a and the ABC memory switch 8a must be turned on, and the single finger chord switch 11 must also be turned on. In this example, you will also need to turn on Auto Arpeggio.
Switch 13S and duet switch 10 must be turned off.

In this embodiment, if the above-mentioned switch operation is performed, the melody memory switch 7a is turned on, and the output of the OR circuit 52 becomes "1" and R
- The SFF 44 is set, and the melody memory signal Mm, which is its Q output, becomes "1" and the pitch/note length data storage means in the performance data processing device 34, which will be described later, is enabled for storage, and the ABC memory switch 8a is turned on. When turned on, the output of the OR circuit 50 becomes "1" and the R-SFF 43 is set, and the code memory signal Mc, which is its Q output, becomes "1" and the code data storage circuit 36 is put into a memorizable state. .

Furthermore, since the T-FF 41 is reset by the signal IC at power-on, and its Q output, the easy print signal EP, is "0", the AND circuit 47 is turned on by turning on the single finger code switch 11. The output becomes "1", and the output signal a of the OR circuit 54 becomes "1".

When the synchro start switch 16 is turned on, the signal b becomes "1", and when the auto arpeggio switch 13S and duet switch 10 are turned off, the output signals c,
d becomes "0".

That is, when this signal a becomes "1", single finger chord accompaniment is specified in the automatic accompaniment circuit, and when signals c and d become "0", cancellation of auto arpeggio and duet accompaniment is specified. It turns out.

This condition makes it possible to memorize melodies and chord performances, and if you turn on the standby switch 23 of the printer 3, the printer 3 will start operating at the same time as you start pressing the keys, and if you turn on the start/stop switch, the printer 3 will start operating immediately. Print out the sheet music.

However, according to this embodiment, by turning on the simple operation switch 22 once, the T-FF41
The output of is inverted and its Q output, the easy print signal EP, becomes “1”, thereby
Regardless of the states of the ABC memory switch and melody memory switch, R
-SFF 43 is set to set the code memory signal Mc to "1", and R-SFF 44 is set via the OR circuit 52 to set the melody memory signal Mm to "1".

Then, the inverter-equipped inputs of the AND circuits 45 and 46 are set to "1", and inputs to the ABC memory off switch 8b and the melody memory off switch 7b are prohibited.

Furthermore, since the output signal a of the OR circuit 54 is set to "1" and the inputs with inverters of the AND circuits 48 and 49 are set to "1", their respective output signals c and d are set to "1".
is held at “0”.

In this way, exactly the same signals as when performing each of the above-mentioned switch operations are sent to the performance data storage device 3.
4. Not only can the melody and chord performance be stored by applying the data to the chord data storage circuit 36 and the automatic accompaniment circuit 35, but also the standby switch 23 of the printer 3 is turned on, as will be described later. At the same time as the start, the printer 3 is activated to print out the musical score.

In this way, the standby state is achieved by a single touch operation of the simple operation switch 22, making the operation extremely simple.

Before starting the performance, use the transpose select knob in Figure 2 to check whether or not to move, and if so, what key to use, check the volume of the bass chord using ABC volume 9, and check the rhythm using tempo volume 15. Of course, it is necessary to check the tempo of the synchronization start switch 16 and the rhythm selection switch group 17, and the timing and type of rhythm generation using the synchro start switch 16 and the rhythm selection switch group 17.

Next, the basic configuration of this performance data processing device 34 will be explained with reference to FIG.

This performance data processing device includes a pitch data temporary storage means 55, a note length data generation means 60, a note length data temporary storage means 65, and a note length correction means 70.
and pitch/note length data storage means 80.

and the key data generated by keyboard 1
Pitch data (key code signal) for one bar by KD is sequentially temporarily stored in pitch data temporary storage means 55.

On the other hand, the duration of the key data KD is detected by the note length data generating means 60, and note length data corresponding to each pitch data is generated and sequentially stored in the note length data temporary storage means 65.

The note length correction means 70 removes short rests such as sixteenth rests after the notes shown in FIG. , is means for correcting note length data so as to lengthen the note length of the previous note as shown in FIG.

Then, the pitch data temporarily stored in the pitch data temporary storage means 55 and the note length data corrected by the note length correction means 70 are sequentially stored in the pitch/note length data storage means 80.

Note that when there is both pitch data and note length data, it is note data, and when there is no pitch data (all zero) and there is only note length data, it is rest data.

Note length data correction means 70 in this embodiment
is composed of the following parts.

(a) Input two consecutive data DF and DR stored in the pitch data temporary storage means 55, and confirm that the previous data DF contains pitch data and the subsequent data DR does not have pitch data (i.e. (b) Among the note length data stored in the note length data temporary storage means 65, the mark corresponding to the data DR after being input to the discriminator circuit 71. Compare the length data LR with the minimum note length data Lm, which is set in advance by the minimum note length setter 72 and corresponds to the minimum rest (for example, an eighth rest) that will not be removed even if there is a rest after a note. and a comparator 73 which outputs an output when the former is shorter than the latter (LR<Lm); (c) the note length data stored in the temporary storage means 65;
an adder 74 that adds and outputs the code length data LF and LR corresponding to the preceding data DF and subsequent data DR; (d) the outputs d ₁ and d ₂ of the discriminator 71 and the comparator 73 are both When it is hot (when it is “1”), the note length data LF and
LR and the output of the adder 74 is output instead of the previous note length data LF, and the subsequent note length data LR is not output, and at other times, the above-mentioned note length data is output.
a sorter 75 that outputs LF and LR as they are; (e) a correction shift register 76 that stores the output data of the sorter 75 in correspondence with each storage data of the pitch data temporary storage means 55; A more specific embodiment of the processing device will be described with reference to FIGS. 5 to 8. In addition, in FIG. 5, each part corresponding to that in FIG. 4 is surrounded by a dashed-dotted line and given the same reference numeral.

Each part in FIG. 5 receives each control signal from the control circuit 81 and the easy print signals EP and R in FIG.
- It is operated by the melody memory signal Mm from the SFF 44 and each clock pulse from the clock generator 39 and frequency divider 40.

First, the operation of the control circuit 81 configured as shown in FIG. 7 will be explained.

The standby switch 23 also shown in FIG. 2 is a push-on type switch, and the start/stop switch 24 is a push-on/push-off type switch.

When the standby switch 23 is turned on while the melody memory signal Mm is "1",
The output of the AND circuit 811 becomes "1" and the output of the OR circuit 812 also becomes "1", so the OR circuit 81
At the same time, the print start signal PST, which is the output of No. 3, becomes "1", the R-SFF 814 is set and its Q output becomes "1", and the printer enters a standby state.

When the simple operation switch 22 shown in FIG. 3 is turned on and the easy print signal EP is set to "1", the output of the OR circuit 812 becomes "1", so that the standby state is entered as in the case described above.

When you press a key in this state, pitch data appears in the key data KD, so the key data shown in Figure 5
Since the key-on signal KON, which is the output of the OR circuit 82 that ORs each bit of KD, becomes "1",
The output of the AND circuit 815 in FIG. 7 becomes "1".

Therefore, the output of the OR circuit 816 also becomes "1" and sets the R-SFF 817, so its Q
The operation signal RUN, which is the output, becomes “1” and the fifth
The entire performance data processing apparatus shown in the figure starts operating. At the same time, the bar counter 818 is enabled to start counting the tempo clock TCL. And R-SFF814 is an AND circuit 815
It is reset by the output of

When the bar counter 818 counts a number of tempo clocks TCL corresponding to the length of one bar, it sets the count over signal _J1 to "1", simultaneously resets itself, and starts counting the tempo clock TCL again.

When the count over signal _J1 becomes "1", the output of the OR circuit 819 becomes "1", and the delay circuit 820
is delayed by one period of the reference pulse φ ₀ and sets the R-SFF 821, and its Q output, the write signal J ₂ , becomes “1”.

By the way, when the start/stop switch 24 is turned on when the melody memory signal Mm is "1", the output of the AND circuit 822 changes from "0" to "1", so the one shot multi 823 outputs a pulse. At the same time, the print start signal PST is set to “1” via the OR circuit 813,
R-SFF 817 is set via OR gate 816. Therefore, since the operation signal RUN is set to "1" and the measure counter 818 is enabled,
Performance data processing device 3 immediately without waiting for the key press to start.
4 and printer 3 start operating.

In this case, whole rests will be printed until you start pressing the key.

In this way, the easy print signal EP is “1”
or the start/stop switch 24 is on, turn on the easy operation switch 22 again and turn on the easy print signal.
When EP is set to "0" or the start/stop switch 24 is pressed again to turn it off, the falling differential circuit 824 or 825 generates a falling pulse, and the OR circuit 8 having inverters at both input terminals generates a falling pulse.
The output of 26 becomes “1” for a short time, and R-SFF8
17 to set the operation signal RUN to "0" and output it as the termination signal ST.

When this end signal ST becomes “1”, the OR circuit 8
19 and a delay circuit 820, the R-SFF 821 is set with a delay of one cycle of the reference pulse _φ0 , and the write signal _J2 is set to "1".

The configuration and operation of each part shown in FIG. 5 will be explained below.

The pitch data temporary storage means 55 is a selector 55
0, latch circuit 551, pitch shift register 5
In addition to the main part consisting of 52, a vertical line data generation circuit 553 and a final line data generation circuit 554,
It includes an inverter 555, a one-shot multi-channel circuit 556, an OR circuit 557, and a delay circuit 558 for generating control signals.

The pitch shift register 552 has a capacity to store pitch data for one measure (even in the case of zero). For example, if the minimum note length to be stored is a 16th note or a rest, It has a 16-bit shift capacity.

A vertical line data generation circuit 553 generates vertical line data to be inserted at the end of each measure, and a final line data generation circuit 554 generates final line data consisting of a thin line and a thick line to be inserted at the end of a song.

The note length data generation means 60 includes an event detection circuit 600, an OR circuit 601, and a 4-input OR circuit 60.
2. Sign length counter 603, AND circuit 604, delay circuit 605, comparator 606, latch circuit 608
Consisting of

The note length data temporary storage means 65 includes a note length shift register 650 having the same shift capacity as the pitch shift register 552, and a delay circuit 651 that outputs the shift pulse.

The note length correction means 70 includes a note length shift register 6
Correction shift register 7 with the same shift capacity as 50
6, and the corrected note length data is temporarily stored therein, the details of which will be described later with reference to FIG.

The pitch/note length data storage means 80 is a RAM (random access memory) 80 for data storage.
0 and its input data switching gate circuit 80
1,802, an OR circuit 803, a write address counter 804 for inputting address data, a read address counter 805, and a selector 806.
, a gate circuit 807 for write control, and an AND gate 808.

83 is an OR circuit that outputs a gate signal for controlling the gate circuit 807, and 84 is a vertical line detection circuit that outputs a signal _J3 when vertical line data is included in the output data from the pitch shift register 552.

85 is a shift pulse switching circuit for switching the shift pulse when reading data from the pitch shift register 552 and the correction shift register 76 depending on the presence or absence of output data; The NOR circuit 850 takes the NOR of each bit of data, and the NOR circuit 850 takes the NOR of each bit of the output data from the correction shift register 76.
NOR circuit 851, this NOR circuit 850, 851
An AND circuit 852 performs an AND operation between the output of the AND signal _J2 and the write signal _J2 .
AND circuits 853 and 854 and OR circuit 8 which switch the shift pulse of 2 to clock pulse φ ₀ or φ ₁
55. Similarly, switch the shift pulse of the correction shift register 76 to clock pulse φ ₀ or φ ₁ .
It consists of AND circuits 856 and 857 and an OR circuit 858.

The event detection circuit 600 is a circuit that generates an event pulse e as shown in FIG. 6B when a key is pressed and released based on a change in key data KD as shown in FIG. It consists of a falling differential circuit, an inverter that inverts the falling differential pulse, an OR circuit (including waveform shaping) that takes the OR with the rising differential pulse, etc.

When an event pulse e is generated from this event detection circuit 600, it passes through OR circuits 601 and 602 and resets a note length counter 603. At the same time, the event pulse that has passed through the OR circuit 601 is also input to the pitch data temporary storage means 55, and is inverted by the inverter 555 as shown in FIG. 556 to input a slightly delayed pulse g to the select terminal SA of the selector 550 as shown in FIG.

Thereby, the selector 550 selects the current pitch data being input to the A terminal and inputs it to the latch circuit 551. The latch circuit 551 is
Select terminals SA, SB, SC of selector 550
The data output from the selector 550 is latched by the output pulse of the OR circuit 557 which ORs the input pulses to the selector 550.

The output pulse of the OR circuit 557 is sent to the delay circuit 558.
The signal is delayed by a half cycle of the reference pulse φ ₀ and is input to the clock terminal of the pitch shift register 552 through the OR circuit 855 . As a result, the data latched in the latch circuit 551 is temporarily stored in the pitch shift register 552.

Therefore, since there is pitch data in the key data KD immediately after the key is pressed, it is latched and temporarily stored in the pitch shift register 552. Since there is no pitch data immediately after the key is released, zero data is latched and temporarily stored in the pitch shift register 552. When this pitch data is zero, it becomes data indicating a rest.

On the other hand, the note length counter 603 is reset by the occurrence of the event pulse e, and then the control circuit 81
If the operation signal RUN from
The note length counting pulse nTCL (a pulse with a period corresponding to the minimum note length to be stored, for example, a 16th note or a rest, or a period slightly shorter than that) inputted to the clock terminal through the AND circuit 604 is counted.

Count data N of this note length counter 603
becomes the A input of the comparator 606, is delayed by one cycle of the code length count pulse nTCL by the delay circuit 605, and is input to the latch circuit 608, and at the same time becomes the B input of the comparator 606.

Therefore, as shown in FIG. It is reset to "0". Delay circuit 605
The delayed data N' is data obtained by delaying the count data N by one count, as shown in FIG.

Therefore, since N<N' from the time when the note length counter 603 newly starts counting pulses nTCL until just before the next event pulse e occurs, the relationship between the A input and B input of the comparator 606 is is A>
B, and its output is “0”, so
Latch circuit 608 does not latch input data N'.

When the next event pulse e occurs and the note length counter 603 is reset, the count data N becomes "0" and the delayed data by the delay circuit 605 is
N' is the count data N just before being reset.
Since A of the comparator 606 is equal to
The relationship between the input and B input is A<B, and the comparator 60
The output of 6 becomes "1".

Thereby, the latch circuit 608 latches the delay data N' at that time and outputs it to the code length shift register 650 as code length data.

When the output of the comparator 606 becomes "1", it is delayed by a half period of the reference pulse φ ₀ by the delay circuit 651 and inputted to the clock terminal of the shift register 650 for code length. The latched note length data is temporarily stored in the latch circuit 608.

Note that note length data based on count data during key depression indicates the length of a note, and note length data based on count data during key release indicates the length of a rest.

For example, when the note length data is "1", it is a sixteenth note or rest, when it is "2", it is an eighth note or rest, when it is "4", it is a quarter note or rest, and when it is "8", it is a quarter note or rest. represents a half note or rest, and ``16'' represents a whole note or rest.

If you do this, short key presses or key release times shorter than a 16th note or rest will be ignored, but
If the period of the note length counting pulse nTCL is made sufficiently shorter than the minimum note length, the note length data latched by the latch circuit 608 is corrected by rearranging the fractions so that it becomes the minimum note length unit to be stored. , more accurate note length data can be obtained.

In this way, each time a key is pressed or released, pitch data and note length data are associated and temporarily stored in the pitch shift register 552 and note length shift register 650, respectively, and the previously stored data is Shift it to the right in the diagram.

Then, when the measure counter 818 in FIG. 7 counts the tempo clock TCL for one measure and the count over signal _J1 is output from the control circuit 81, the note length counter 603 is reset via the OR circuits 601 and 602. At the same time, selector 5
50 is set to "1", vertical line data from the vertical line data generation circuit 553 is selected, latched in the latch circuit 551, and stored in the pitch shift register 552.

Therefore, if the key is still pressed or released even at the end of one measure, the note or rest is divided before and after the vertical line indicating the measure. In this case, a tie may be added when the note is divided.

Easy print signal EP goes from “1” to “0”
or when the start/stop switch 24 is turned off from on, the control circuit 81 outputs the end signal ST as described above.

As a result, the note length counter 603 is reset via the OR circuit 602, the select terminal SC of the selector 550 is set to "1", the end line data from the end line data generation circuit 554 is selected, and the latch circuit is activated. 551 and stored in the pitch shift register 552.

By the way, the measure counter 81 from the control circuit 81
When the count-over signal _J1 of 8 is output and when the above-mentioned end signal ST is generated, the write signal _J2 becomes "1" with a slight delay.

As a result, the data temporarily stored in the pitch register 552 (in addition to pitch data, this includes rest data, vertical line data, and final line data due to the absence of pitch data) and the note length shift Data transfer in which the note length data temporarily stored in the register 650, corrected by the note length correction means 70, and stored in the correction shift register 76 is sequentially read and written to the RAM 800 of the pitch/note length data storage means 80. The action takes place in a very short time.

At this time, the pitch shift register 552 and the correction shift register 76 have a capacity that can store data for the maximum number of notes in one measure (16 in this example), so it is unlikely that all data is stored. There are hardly any, and the shift bit on the right in the diagram is empty.
Furthermore, there are some parts of the correction shift register 76 where note length data is missing due to correction.

By increasing the reading speed of such blank areas,
A shift pulse switching circuit 85 is provided to shorten the transfer time of all data.

That is, while the data output from the right end of the pitch shift register 552 and the correction shift register 76 are both "0", the NOR
If the outputs of circuits 850 and 851 both become "1" and the write signal J ₂ becomes "1" at this time, the output of AND circuit 852 also becomes "1".

The output of this AND circuit 852 is
3 and 856 as they are, AND circuits 854 and 8
Since it is inverted and input to 57, AND circuit 8
53 and 856 pass a high-frequency reference pulse φ ₀ , this reference pulse φ ₀ passes through an OR circuit 855 to the clock terminal of the shift register 552 for pitch, and passes through an OR circuit 858 to the clock terminal of the shift register 76 for correction. Since each shift pulse is input to the clock terminal, the data in each shift register 552 and 76 is shifted to the right at high speed.

Then, when data is output from at least one of the pitch shift register 552 or the correction shift register 76, the output of at least one of the NOR circuits 850 and 851 becomes "0", so the output of the AND circuit 852 becomes “0”.

As a result, the AND circuits 853 and 856 no longer pass the reference pulse φ ₀ , and the AND circuits 854 and 856 no longer pass the reference pulse φ 0 .
857 passes a clock pulse φ ₁ having a lower frequency than the reference pulse φ ₀ and inputs it as a shift pulse to the clock terminals CK of shift registers 552 and 76 via OR circuits 855 and 858, respectively.

Therefore, the data stored in the pitch shift register 552 and the correction shift register 76 are each shifted to the right at the normal read speed and sequentially read out.

Note that due to note length correction, even in parts where there is no note length data for rests in the correction shift register 76, the corresponding pitch data is also "0" for rests.
Therefore, it is fast forwarded and packed.

Next, in the pitch/note length data storage means 80, since the write signal _J2 is "1",
RAM800 enters the write state and selector 800
6 selects the address data from the write address counter 804 and designates the write address of the RAM 800.

Since the gate circuits 801 and 802 are alternately opened by the clock pulse φ ₂ and the inverted clock pulse ₂ , the corresponding output data from the pitch shift register 552 and the correction shift register 76 are alternately output to the OR circuit 803. , RAM8
00 is written sequentially.

However, when the melody memory signal Mm is “0”,
During fast forwarding when the output of the RAM circuit 852 is "1", the output of the OR circuit 83 is "1", so the gate circuit 807 having an inverter at its control terminal is closed, and the clock pulse φ is ₁ is not input to the write address counter 804, the write address of the RAM 800 is not changed, and useless writing without data is prevented.

That is, when the melody memory signal Mm is "0", the pitch/note length data storage means is in a state where it cannot store new data.

When the vertical line detection circuit 84 detects vertical line data,
Since the signal _J3 is set to “1”, the R-SFF of the control circuit
821 (FIG. 7) is reset and the write signal J ₂
becomes “0”, so the pitch shift register 55
2 and the correction shift register 76, the RAM 800 enters the read state, the selector 806 selects the address data from the read address counter 805, and outputs the read pulse from the printer circuit described later.
Each time CK is input, the address is updated and the stored pitch data, note length data, etc. are read out sequentially.

At this time, temporary storage of pitch data and note length data for the next measure has begun.

Next, a specific example of the note length correction means 70 will be explained with reference to FIG.

The part corresponding to the discriminator 71 in FIG. , the output of the OR circuit 710 that ORs all the bits of the previous data DF (the right shift position in the figure) among the data at two consecutive shift positions stored in the pitch shift register 552 is OR as input and OR of all bits of the subsequent data DR
The output of the circuit 710 is inverted and used as a second input, and further, among the 15 comparators 730 corresponding to the comparator 73 in FIG. The output of the comparator 730 that compares the code length data LR at the shift position is
It is composed of 15 3-input AND circuits that use the inputs as inputs.

Each comparator 730 has a code length shift register 65
The note length data stored at each shift position except the first shift position of 0 (the rightmost position in the figure) is inputted to B, and the note length corresponding to the eighth note length set by the minimum note length setter 72 is input. It compares with the A input of data Lm, and when A>B, that is, when the note length data is less than the eighth note length, the output is set to "1".

Each OR circuit 710 sets at least one bit to “1” when the input data includes pitch data.
Since there is, the output is set to "1", and when there is no pitch data (rest data), all bits are "0", so the output is set to "0".

Therefore, each AND circuit 711 determines that among the data at two consecutive shift positions stored in the pitch shift register 552, pitch data is assigned to the previous data and pitch data is assigned to the subsequent data. The output is set to "1" only when there is no record and the note length data corresponding to the subsequent data is less than the eighth note length (sixteenth note length). The output of each AND circuit 711 becomes the A input of the selector 750, respectively.

This selector 750 has 15 pairs of A input terminals and B input terminals, and output terminals corresponding to each pair.
A select terminal SA is provided, and "0" is input to each B input terminal. The easy print signal EP is input to the select terminal SA, and when this signal EP is "1", each AND circuit 7 which is the A input
11 is selected and output, and when the signal EP is "0", the B input "0" is selected and output.

15 adders 7 corresponding to adder 74 in FIG.
40 adds the note length data stored in two consecutive shift positions of the note length shift register 650 and outputs the result.

A portion corresponding to the selector 75 in FIG. 4 is constituted by the aforementioned selector 750 and 16 selectors 751 whose selection is controlled by each output thereof.

Each select output of each of the 16 selectors 751 is stored in each shift position of the correction shift register 76, and only the selector 751 that stores output data in the leftmost shift position in the figure is stored in the note length shift register 656. input only the data of the rightmost shift position, but other selectors 751
In each case, the code length data at the corresponding shift position of the code length shift register 650 is used as the B input, and the output of the adder 740 that adds the following code length data is used as the A input.

Then, each output signal of the selector 750 is displayed on the right side (for the previous note length data) in the corresponding diagram.
It is input to the select terminal SA of the selector 751, and is also inverted through the inverter IN and input to the enable terminal EN of the selector 751 on the left side (for later note length data) in the figure.

Therefore, the previous note length data selector 751 corresponding to the bit for which the output of the selector 750 is "1" selects and outputs the note length data from the adder 740, and outputs the selected note length data from the adder 740. Selector 751 is not enabled and therefore does not output data.

Selector 751 for previous note length data corresponding to the bit for which the output of selector 750 is “0”
outputs the note length data from the note length shift register 650 as it is, and outputs the note length data as it is from the note length shift register 650, and outputs the note length data as it is from the note length shift register 650,
51 is enabled and selects and outputs the code length data from the code length shift register 650 or the output data of the adder 740, depending on whether the input to the select terminal SA is "0" or "1".

Such a note length correction operation is performed every time the data in the pitch shift register 552 and note length shift register 650 is shifted, but when the output data of each selector 751 is transferred to the correction shift register 76, The data is taken in when the vertical line detector 77 detects that vertical line data has entered the pitch shift register 552.

Finally, the control device for the printer 3 will be explained with reference to FIG.

This printer control device includes a data identification circuit 90
and ROM (read only memory) for the first measure 9
1. ROM 92 for key symbols, ROM 93 for notes, ROM 94 for rests, ROM 95 for staff bar lines, ROM 96 for chord symbols, ROM 9 for final lines
7, an OR circuit 98 that ORs the data read from each of these ROMs, a pen position control unit 99 that controls the position of the printing pen in a direction perpendicular to the paper feed direction, and a pen position control unit 99 that controls the paper feed position. The paper feed control section 100 and OR circuits 101 to 105 are configured.

This device first outputs a print start signal PST.
is input to the first measure ROM91, this
The staff, bar line, and clef (treble clef, bass clef, etc.) of the first measure stored in ROM91
and the time signature (4/4, 3/4, etc.) selected by the time signature change signal are read out and sent to the pen position control section 99 and printer 3 via the OR circuit 98. The paper feed control unit 100 controls the positions of printing paper (hereinafter simply referred to as "paper") for printing musical scores and a pen in orthogonal directions, and prints the staff, bar line, and bar line of the first measure. Print clefs and time signatures.

During this period, each time the pen position control unit 99 and/or paper feed control unit 100 controls the movement of the pen or paper by one pitch, the output of the OR circuit 101 becomes “1” and data is read from the ROM 91 for the first measure. will be held.

When data reading from the first measure ROM 91 is completed, the end signal END causes the
Next, data for printing the key symbol is read from the key symbol ROM 92. ROM9 for this key symbol
2 stores the key signature data of all the keys that can be printed, but the switch 25 for flat input or the switch 26 for sharp input shown in FIG.
Outputs key symbol data with a number of flats (♭) or sharps (#) according to the number of times that is turned on,
If the switches 25 and 26 are never turned on, no data is output and the key is set to C.

When the reading of data from the key signature ROM 92 is completed, the first one is stored in the RAM 800 in FIG.
It waits for the bar data to be transferred, and when the signal _J3 from the vertical line detection circuit 84 becomes "1", it issues an end signal END.

Depending on the end signal, OR circuits 102 to 1
04, the output of the OR circuit 105 becomes "1", and as a read pulse CK, the read address counter 805 in the pitch/note length data storage means 80 in FIG. 5 and the code data storage circuit 36 in FIG. address counter for reading (not shown)
Enter.

As a result, data such as pitch and note length are read out from the RAM 800 in FIG. 5, code data is read out from the code data storage circuit 36 in FIG. etc. are inputted as address data into the note ROM 93 and the rest ROM 94, and the chord data is inputted into the chord symbol ROM 96 as address data.

Then, the data identification circuit 90 outputs a signal if the input data includes pitch data, a signal if the input data includes pitch data and note length data, a signal if the input data is only note length data, and a signal if the input data is vertical line data. , outputs a signal at the 5th bar, outputs a signal f if there is code data, and outputs a signal if there is final line data, controls the reading of data from each ROM 93 to 97, and outputs notes (including accidentals), Stored data such as rests, chord symbols, staff lines and bar lines for the next measure, and end lines are read out and sent to the pen position control section 99 and paper feed control section 100 via the OR circuit 98.
send to

As a result, the prints based on each piece of data sway to form a musical score.

Since one staff line is made up of 4 measures, the signal is disabled at the 5th measure, and the data is read from the first measure ROM 91 and the key mark ROM 92 again. In addition to printing clefs, time signatures, key symbols, etc.

When the data identification circuit 90 identifies the pitch data and outputs a signal, and each time the data reading from each ROM 92 to 96 is completed and the end signal END is generated, the OR circuit 105 outputs the read pulse CK. New data is read and input one after another.

In this way, the printer 3 shown in FIG. 2 prints out a musical score corresponding to the performance data.

Note that the functions of each part of the performance data processing apparatus, including the note length correction means shown in FIG. 8 in the above-described embodiment, can also be achieved by program processing using a microcomputer.

As explained above, the keyboard electronic musical instrument according to the present invention can store melody data and chord data at the time of performance by simply operating a simple switch, so it is extremely easy to operate, and performance data with accompaniment can be stored in sheet music. This is convenient for displaying or printing out the music, or for automatically reproducing your own performance.

Particularly when printing out musical scores, operability can be further improved by setting the printer to standby mode with a single touch operation of the simple operation switch, as in the above-described embodiment.

[Brief explanation of drawings]

FIGS. 1A and 1B are diagrams showing examples of musical scores displayed or printed according to an embodiment of the present invention, and FIG. The plan view shown in Fig. 3 is as follows.
Similarly, FIG. 4 is a block diagram showing the basic configuration of the performance data processing device in FIG. 3, and FIG. 5 is a block circuit diagram showing a specific example thereof. 6th
5 is a signal waveform diagram for explaining the operation of the circuit in FIG. 5, FIG. 7 is a block circuit diagram showing a configuration example of the control circuit in FIG. 5, and FIG. 8 is a note length correction means in FIG. 5. Block diagram showing an example of the configuration, No. 9
3 is a block circuit diagram showing a configuration diagram of the printer control device in FIG. 3. FIG. 1...Keyboard, 2...Speaker, 3...Printer, 22...Simple operation switch, 23...Standby switch, 24...Start/stop switch
Switch, 30...Switch signal processing circuit, 34
... Performance data processing device, 35 ... Automatic accompaniment device, 36 ... Chord data storage circuit, 55 ... Pitch data temporary storage means, 60 ... Note length data generation means, 65 ... Note length data temporary storage means , 70...
...Note length correction means, 80...Pitch/note length data storage device.

Claims (1)

[Scope of Claims] 1. In an electronic keyboard musical instrument equipped with an automatic accompaniment circuit having an auto bass chord function, pitch/note length data storage means for sequentially storing pitch data and note length data based on key data from the keyboard. a melody memory switch for setting the pitch/note length data storage means in a memorizable state; a chord data storage means for sequentially storing chord data indicating chord names generated from the automatic accompaniment circuit; an auto bass chord memory switch for setting the chord data storage means in a memorizable state; a simple operation switch; and when the simple operating switch is operated, the states of the melody memory switch and the auto bass chord memory switch are changed. a switch signal that generates a signal that puts the pitch/note length data storage means and the chord data storage means into a memorizable state regardless of the pitch and note length, and also generates a signal that specifies a predetermined specific automatic accompaniment function in the automatic accompaniment circuit; An electronic keyboard musical instrument characterized by having a processing circuit and the following.