JPS6367194B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a small electronic device with a melody memory function.

In recent years, so-called musical tones are generated by storing only the scale data of a melody in a memory in advance, reading the scale data sequentially from the memory each time a specific key is pressed, and adding tone length data to each read scale data. A small electronic device with a one-key play function, and melody scale data in memory,
Small-sized electronic devices have been developed that have a so-called autoplay function in which the companions of tone length data are stored in advance and these data are automatically sequentially read out to perform a melody.

By the way, as a method for inputting scale data and note length data into the memory in the above-mentioned small electronic device with the auto-play function, the first method is to input the scale data and note length data by actually playing the scale keys. Second, there have been proposed systems in which scale data and note length data are input by alternately operating scale keys and note keys. However, the first input method has the disadvantage that it is difficult for amateurs to input the melody because it requires actually playing the melody.
On the other hand, the second method requires the provision of musical note keys, which has the disadvantage of increasing the size of the device.

Therefore, the scale data for one song is stored in advance in the storage means by operating the scale keys, and this scale data is read out by the readout key, and the operation time of the readout key is used again as note length data in the storage means. A technology has been proposed in which the information is stored in the memory (see Japanese Patent Application Laid-open No. 83094/1983). According to this technique, scale data and note length data can be input easily, but the scale data and note length data are stored for each note in the storage means, similar to the above two input methods. , there is an inconvenience that a large storage capacity of the memory for auto play is required.

This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a melody memory that can compress data stored in an autoplay memory and improve memory usage efficiency. Our goal is to provide small electronic devices with functions.

Hereinafter, an embodiment in which the present invention is applied to a small electronic calculator having a musical tone generating function will be described with reference to the drawings. In FIG. 1, a key input section 2 with various keys, a display section 3, and a sound emitting section 4 are provided on a case 1 of a small electronic calculator, and
Inside case 1, each circuit shown in Fig. 2 is configured.
LSI parts, batteries, etc. are provided. The key input unit 2 is provided with a calculation key and a melody performance key, respectively. That is, numeric keys □0 to □9, function keys +/-, ・□, on the operation unit 2A.
..., and the function key on the operation panel 2B.
As is well known, AC,... is a key for calculation. On the other hand, in this embodiment, the 17 keys +/-, ..., =□ on the operation unit 2A are also used for melody performance as pitch designation keys (scale keys) for scales A ₃ to _{B 5.} ing. In addition, the key AC on the operation unit 2B is used as a clear key for the address counter, which will be described later, and the key C□ is used as a melody performance key for correcting scale data and note length data in the note memory, which will be described later. be done. Furthermore, the keys 〓 and %□ are used to raise or lower the rhythm tempo. Further, the key M-5a is used together with the key AC to output an auto-play start command. Furthermore, key M+5b
is used as a one-key play key, but the key with reference number 5c in the figure is also used as a one-key play key having exactly the same function as key M+. Here, one-key play refers to a function that sequentially reads out a series of scale data of the melody written in the note memory one by one for each operation of key M+5b or one-key play key 5c, and performs the performance. . Furthermore, reference numerals 6, 7, 8, and 9 in the figure are a volume switch, an octave shift switch, a tone designation switch, and a mode changeover switch, respectively. The mode changeover switch is at the changeover position PL,
It has REC, CAL, and OFF, and specifies performance mode, recording mode, calculation mode, and power off mode, respectively. In addition, the above tone designation switch 8
In the F position, you can set each ADSR time and specify the tone for one-key play and automatic play.

Of the 17 pitch specification keys mentioned above, keys +/- are semitone keys, keys □ and 0□ are pitches A and B of the 3rd octave, and keys 1□ to 7□ are pitches of the 4th octave. C~B, keys 8□, . . . =□ are keys specifying pitches C~B of the fifth octave. In the case of chromatic key operation, for example, pitch A ₃ #, two keys are operated in the order of keys +/- and □. Also, in order to show that the key arrangement of the above keys +/- ~ = □ corresponds to the above-mentioned scale A ₃ to B ₅ ,
As shown in the figure, a pattern of the key arrangement of a keyboard instrument is printed on the operation section 2A. Furthermore, pitches C to B are made to correspond to numbers 1 to 7, and the third
For the octave and the 5th octave, a bar (-) is added to the lower right or upper right of the above numbers to indicate that they correspond to the 3rd or 5th octave, respectively. teeth,
No bar is displayed, indicating that it is the fourth octave.

Next, the circuit configuration will be explained with reference to FIG.
The output of the mode changeover switch 9 on the key input section 2 is the signal MD, and the output of other various keys is
Each signal is given to the control unit 11 as a signal KD. Incidentally, on the key input unit 2 in FIG. 2, the one-key play key M+5b and the one-key play key 5c mentioned above are both shown as a key 1key, and their output is indicated as a signal 1key. Also the key
The autoplay start command key composed of AC and M- is indicated by AUTO, and its output (start command) is indicated by the signal AUTO. Further, the output of the key C□ is displayed by the signal C, and the signals 1key, AUTO, and C are all input to the control section 11. In addition, key input section 2
When the mode selection switch 9 is switched from the switching position OFF to another switching position and the power is turned on, a reset signal RST is output and each circuit is initialized.

The control unit 11 stores microprograms that control the operation of the small electronic calculator in various modes, inputs the signal MD, determines the set mode, and outputs various microinstructions for the determined mode. With signal KD, 1key
etc., the type of operation key is determined and the corresponding microinstruction is output.

The arithmetic storage section 12 consists of an arithmetic circuit and a RAM (random access memory), and receives numerical data via the bus line B1 and instruction data via the bus line B2 from the control section 11 as predetermined microinstructions. , performs various operations such as four arithmetic operations, logical operations, and judgment operations. The operation result data is stored in an internal RAM or the like or provided to other circuits, and the data to be displayed is provided to the display section 3 for display.

The note memory 13 consists of a RAM, and is a circuit that stores a series of scale data, note length data, and flag data for one melody piece, respectively.
Therefore, the note memory 13 has an address counter 14.
The address data output by the controller specifies the address of the area for storing each of the above data, and the read/write control signal R/W output from the control unit 11 controls the read and write operations of each of the data. controlled respectively. That is, note memory 1
3, the mode changeover switch 9 is switched to the changeover position REC, and the storage mode is set. Next, the key MC is operated, the note memory 13 is cleared by the signal R1 outputted from the control section ₁₁ , and the address counter ₁₄ is reset by the signal R2. Next, according to the melody, pitch designation keys _A3 to _B5 are operated in sequence. At this time, a +1 signal is output from the control unit 11 to the address counter 14 for each key operation of the pitch designation key, the address data is updated, and the scale data for the operated pitch designation key is transferred to the control unit 11. 11 and are sequentially outputted to the buffer 15, and
At the same time, the buffer 15 includes a comparison circuit 16,
The flag data and tone length data respectively created by the tone length counter 17 are sequentially given, and as a result,
The scale data, flag data, and note length data are sequentially written into the note memory 13 via a buffer 15. This writing operation is for obtaining accurate scale data for one-key play, but in the case of this invention, in order to obtain accurate flag data and note length data for autoplay, the above-mentioned writing operation is necessary. Then, press another key
After operating the AC to reset the address counter 14, the one-key play key M+5b or the one-key play key 5c is operated in accordance with the rhythm generated by the rhythm generating section, which will be described later. In this case, each time the key M+5b or 1 key play 5 is operated, a +1 signal is output from the control unit 11 to the address counter 14 to update the address data, and the comparison circuit 16 and tone length counter 17 output a +1 signal to the address counter 14. Therefore, accurate flag data,
Each tone length data is created and sequentially written into the note memory 13 via a buffer 15. Note that the scale data written in the previous writing operation to the note memory 13 is read out sequentially from the note memory 13 at this time and is transferred to the note memory 13 via the buffer 15.
At the same time, it is written to the relevant area again and is also given to the musical sound generation section via the code conversion section, which will be described later. Therefore, the above-mentioned auto play data creation is executed while the melody is played by one-key play. It is becoming. On the other hand, in order to perform a melody by reading out the data for one-key play or the data for auto-play written in the note memory 13 in the above-described manner from the note memory 13, first switch the mode selector switch 9.
Switch to the switching position PL to set the performance mode,
Next, in the case of one-key play rhythm performance,
First, operate the key AC to enter the address counter 14.
, then press the above key M+5b or 1.
Operate the key play 5c to read scale data one by one from the note memory 13. On the other hand, in auto play rhythm performance, if keys AC and M- are operated continuously, the address counter 14 is reset and then automatically incremented by 1, and the note memory 1
A set of scale data, flag data, and note length data are read out one by one. In addition,
In the case of auto play writing operation, after all data has been written for each note of the melody, press key AC, M+5b, 1 key play key 5.
The delimiter code is written by manipulating either c. In the case of this invention, this is so that the melody written in the note memory 13 for one song can be automatically played repeatedly for a specified number of times by continuous operation of the numeric keypad and keys C□M-. be.

Next, scale data, flag data, and tone length data will be explained. The scale data is a signal output from the control unit 11 when each of the pitch designation keys from pitch A ₃ to pitch B ₅ is operated in the recording mode or the performance mode as described above.
A ₃ to _{B 5} are associated with scale data 1 to 27, respectively. The flag data is the on time and off time of the above pitch specification key (note that this off time refers to the time from when the pitch specification key being operated is turned off until the next pitch specification key is turned on) ) are compared in a comparison circuit 16, which will be described later, and as a result, the data is uniquely defined as: ON time≦OFF time: flag data “0” ON time>OFF time: flag data “1”. Furthermore, the tone length data is obtained by measuring the key operation time of each one-key play key such as the pitch designation key or key M+5b and the one-key play key 5c by a tone length counter 17, which will be described later.

When the read signal RD is output from the control unit 11, the buffer 15 reads the scale data, flag data, and note length data and temporarily stores them. This buffer 15 has a capacity for 4 digits (one digit is 4 bits), and its area 15A (8
bit), 15B (1 bit), 15C (7 bit)
The above-mentioned scale data, flag data, and note length data are respectively stored in the .

Next, a circuit for creating the flag data and note length data will be explained. The above pitch specification keys and one-key play keys (key M+5b, one-key play key 5)
The signals KD and 1key outputted from the key input section 2 at the time of each key operation in c) are both applied to the note length counter 17 and the ADS buffer 19 via the OR gate 18. The tone length counter 17 is a counter that counts a predetermined frequency signal output from a timing signal generation circuit (not shown), and
Each time the output of 8 is inverted from "0" to "1", it is reset and the counting operation is restarted. The counted value data of the note length counter 17 is given to the area 15c of the buffer 15 as note length data, and is also given to the input terminal B of the comparator circuit 16, and furthermore, the output of the OR gate 18 changes from "1" to "0". When reversed, it is sent to ADS buffer 19. On the other hand, the input terminal A of the comparator circuit 16 is given the count value data read into the ADS buffer 19.
As a result, the comparison circuit 16 selects the pitch designation key or
Executes an operation that compares the magnitude relationship between the on time (input data to input terminal A) and the off time (input data to input terminal B) of the one-key play key, and when on time ≦ off time, “0” of, also,
When on time>off time, a comparison result signal of "1" is output, and is given to area 15B of buffer 15 as the flag data.

The gate circuit 20 controls the control unit 1 during auto play.
This gate is opened by the gate control signal g output from 1. During auto play, the flag data and note length data sequentially read out from the note memory 13 are sent to the gate circuit 20.
The signal is applied to the tone length division section 21 via the tone length division section 21. Therefore, the tone length dividing unit 21 determines that the input flag data is “0”.
When , the input tone length data is divided 1:1 and signals E1 and E2 having the same content are outputted, while when the input flag data is "1", the input tone length data is divided 3:1. A signal E1 and a signal E2 which are divided and assigned are output respectively. Both signals E1 and E2 are sent to the envelope control section 2.
It is given to 2.

The envelope control unit 22 further receives a signal 1key from the one-key play key.
Therefore, this envelope control section 22 controls the signal
1key input status (ratio of on time to off time)
or depending on the contents of the signals E1 and E2 that are automatically input sequentially during auto play, the ratio of the attack, decay, and sustain parts ADS of the envelope to the release part R may be 1:1 or 3. Two types of envelope control data that are a pair are created and given to the musical tone generator 23, and when the envelope control operation is completed,
The end signal e is outputted and given to the control section 11, and each operation to be prepared for the next musical tone is executed.

The code conversion unit 24 converts scale data (1 to 27) output from the control unit 11 when writing scale data into the note memory 13 using the pitch designation key or when simply performing a melody performance. , Furthermore, the scale data (1 to 27) sequentially read out from the note memory 13 during auto play are input, and the scale data 1 to 27 are used as the scale data 1 to 27.
It is converted into a musical tone code signal having a predetermined relationship with , and is provided to the musical tone generating section 23 . A frequency signal related to each octave is further inputted to the musical tone generating section 23 from the timing signal generating section, and the musical tone generating section 23 converts the musical tone code signal from the code converting section 24 based on the frequency signal. An analog musical tone signal with a corresponding pitch and an envelope based on the envelope control data is generated and outputted, and is supplied to the amplifier 25.

On the other hand, the code converter 26 receives the scale data 1 from the controller 11 or from the note memory 13.
Convert ~27 into the corresponding display data and display it on the display section 3.
This is the circuit that is displayed. In this case, as mentioned above, each scale is associated with a numerical value 1 to 7, and therefore, the scale is displayed on the display unit 3 by a mark "#" indicating a numerical value or a chromatic scale, and a bar indicating an octave. be done.

The delimiter detection section 27 is a circuit that detects the delimiter code read last from the note memory 13 during autoplay. and its detection signal
EM is given to the autoplay repeat control section 28. This auto play repetition control section 28
is a circuit that controls the repeated playing of the melody during the above autoplay, and the above-mentioned signal
AUTO, C, RST, EM, and numerical data representing the number of performances set at the key input section 2 are input respectively. Then, when the signal AUTO is input, the melody start signal ST is generated and the control unit 1
1 and start the first performance. Next, each time before the end of the melody performance, the detection signal EM detected by the break detection section 27 is input and counted, and a detection operation is performed to determine whether the counted value matches the set number of performances. Execute. A series of operations in which the performance repetition signal RP is continuously outputted and given to the control unit 11 until a match is detected, and when a match is detected, the output of the repetition signal RP is stopped to end the repeat performance. It is intended to carry out the following.

The rhythm pattern storage section 29 is composed of a ROM (read only memory) that stores rhythm pattern data of various rhythms such as march and waltz. When the type of rhythm is designated by operating the rhythm designation key on the key input section 2 and a rhythm start is commanded, the control section 11 outputs data indicating the ROM address for the designated rhythm, and the bus line B ₃ is output. The data is provided to the rhythm pattern storage section 29 via the rhythm pattern storage section 29. As a result, the rhythm pattern data of the designated rhythm is read from the rhythm pattern storage section 29, and the read rhythm pattern data is provided to the rhythm generation section 30. The rhythm generator 30 generates a rhythm based on the input rhythm pattern data, outputs an analog rhythm signal, and outputs an analog rhythm signal to the amplifier 2.
Give to 5. The amplifier 25 amplifies both the musical tone signal and the rhythm signal and supplies the amplified signals to the speaker 31.
emit a sound from

Next, the operation of the above embodiment will be explained. First, a melody for a one-key play is preset in the note memory 13, and then the operation for performing a one-key play will be explained. In this case, first, the mode changeover switch 9 is switched from the switching position OFF to REC, the power is turned on, and the recording mode is set.
At this time, the output signal MD of the mode changeover switch 9 is given to the control section 11, so that the reset signal RST is outputted, each circuit is reset, the initial state is set, and the control operation for the recording mode is thereafter controlled. This is executed by the unit 11.
Further, a read/write control signal R/W is outputted to the note memory 13 to give a write command.

Next, the pitch designation key is operated to start key operations for sequentially writing scale data for each note of the melody into the note memory 13. In this case, first operate the key MC. At this time, a signal KD is outputted from the key input section 2 and given to the control section 11, and the control section 11 determines the type of operation key from the signal KD and inputs the note memory 13, address counter 14, etc.
The signals R 1 and R 2 are output respectively for the signals R ₁ and R ₂ . For this reason,
The note memory 13 is cleared and the address counter 14 is reset. Next, if the pitch of the first note of the melody is, for example, A ₃ , then
Turn on the key □ and specify the pitch. Then, during the ON operation of this key □, a signal KD is given to the control section 11 and the OR gate 18, respectively. In response, the control section 11 outputs scale data 1 for pitch _A3 , and provides it to area 15A of buffer 15 via bus line B1. On the other hand, the output of the OR gate 18 becomes "1" while the above key □ is turned on,
The signal is given to the ADS buffer 19 and note length counter 17, respectively. Therefore, the tone length counter 17 is
While the key □ is turned on, a counting operation of a predetermined frequency signal is executed. Then, when the key □ is turned off, the output of the OR gate 18 becomes "0", and the count value data (on time) of the tone length counter 17 at this point is
The number is stored in the ADS buffer 19, and the tone length counter 17 continues counting until the next key is pressed. For example, if the pitch of the second note is B ₃ , the note length counter 17 measures the duration of the key □ until the key 0 □ for pitch B ₃ is turned on next time. . Then, when key 0□ of pitch _B3 is turned on, signal KD is output again, and the output of OR gate 18 becomes "1" again.
The signal is applied to the ADS buffer 19 and note length counter 17. Therefore, when the key 0□ is on, the input terminals A and B of the comparison circuit 16 receive count value data for the on time of the key □ of the first note, and key □.
Therefore, the comparator circuit 16 compares the two and returns "0" if on time ≦ off time.
If on time>off time, a comparison result signal of "1" is output and applied to area 15B of buffer 15. Furthermore, when the key 0□ is turned on, all the count value data for the key □ is input to the area 15C, and when the above-mentioned turn on, the signal RD is output from the control unit 11, so that when the key 0□ is turned on, the buffer 1
5 areas 15A, 15B, and 15C are read with scale data 1, flag data (“0” or “1”), and tone length data for pitch A ₃ of the first note, respectively.
Next, it is written to address 0 of the note memory 13. Furthermore, after this, a +1 signal is output from the control section 11 to the address counter 14, so that address 1 will be addressed from the next time onwards. Furthermore, when the key 0□ is turned on, the note length counter 17 is reset and starts counting the time for the key 0□.

The writing operation of the scale data for each key after the second note key 0□ to the note memory 13 includes the above-mentioned ON and OFF operations of the first note key □,
Then, the second
In the case of a note key, when the third note key is turned on, the scale data of the second note is written to address 1 of the note memory 13 along with flag data and note length data, and then the third note key is turned on. , when the fourth note is turned on, the scale data of the third note, etc. is stored in the note memory 2.
The address is written, and the same applies hereafter. In addition, the scale data output from the control unit 11 each time a pitch designation key is turned on is stored in the code conversion units 24 and 2, respectively.
6 is also given, so in the code conversion section 24,
Converting the input scale data into a corresponding musical tone code signal and providing it to the musical tone generating section 23, whereby a musical tone having the pitch of the operation key is emitted from the speaker 31, and the pitch is aurally confirmed. I can do it.
In addition, the code converting unit 26 converts the input scale data into corresponding display data and provides the same to the display unit 3. As a result, the pitches of the operation keys are displayed using numbers, etc., and can be confirmed visually. .

With the above explanation, the writing operation of the scale data of the one-key play melody to the note memory 13 is completed. Figure 3a explains this operation.

Next, when reading the scale data written in the note memory 13 as described above and starting a melody performance by one-key play, first switch the mode changeover switch 9 from the changeover position REC to PL,
Set the performance mode. As a result, the control section 11
Thereafter, the control operation for the performance mode is started.

Next, operate the key AC. At this time, the control section 11
A signal R is output from the address counter 14.
is reset, and address 0, which is the starting address of the note memory 13, is addressed. Next, the one-key play key M+5b or the one-key play key 5c, or the partner key is operated alternately to start a one-key play melody performance. For example, when the 1 key play key 5c is first turned on, a signal 1key (“1”) is output from the key input section 2 and is applied to the OR gate 18 and the envelope control section 22. On the other hand, the scale data 1 of the first note is read from address 0 of the note memory 13 and is given to the code converter 24. Therefore, the musical tone code signal corresponding to the scale data 1 is input to the musical tone generator 23. has been done. In addition, while the envelope control unit 22 is inputting the “1” signal 1key, the envelope ADS (Attack, Decay, Sustain)
Create envelope control data to control the
It is given to the musical sound generating section 23. Therefore, during the ON operation of the 1-key play key 5c, the musical tone generating section 23 creates a musical tone signal in which the ADS part of the envelope is added to the musical tone of pitch _A3 for scale code 1, and supplies it to the amplifier 25. In response, a musical tone of pitch _A3 is emitted from the speaker 31.

1 When key play key 5c is turned off, signal
1key becomes “0”. For this reason, the envelope control section 22 creates envelope control data for controlling the R (release) part of the envelope and supplies it to the musical tone generating section 23, and in response to this, the musical tone of pitch _A3 is gradually muted. . Further, when the 1 key play key 5c is turned off, the address counter 14 is incremented by 1 and the address 1 is addressed.

Next, if you turn on key M+5b,
The signal 1key of “1” is outputted again and given to the envelope control section 22. Therefore, during the ON operation of the key M+5b, the envelope control section 22
creates envelope control data that controls the ADS part of the envelope. On the other hand, the code conversion unit 24 is given the scale data 3 (pitch B ₃ ) of the second note read from the note memory 13,
As a result, a musical tone of pitch _B3 is emitted. Also,
When key M+5b is turned off, signal 1key is “0”
As a result, the musical tone of pitch _B3 is muted.

Thereafter, in the same manner as described above, each time one of the one-key play keys is turned on, the note memory 13
The scale data is read out one note at a time, and each time the off operation is performed, the address counter 14 is incremented by 1 and the operation of specifying the next address is repeated, and a melody performance by one-key play is executed. FIG. 3b illustrates the operation described above.

Next, a description will be given of the operation when a melody for autoplay is preset in the note memory 13 and then a melody is performed by autoplay. In this case, first, scale data is written into the note memory 13, but this writing operation is performed in the same way as the operation when writing the melody for one-key play into the note memory 13, and the pitch specification key is operated. While playing the melody, the operation of simultaneously writing scale data, flag data, and note length data into the note memory 13 is executed. When presetting a melody for auto play, turn on any one of the keys AC, M+5b, and 1 key play key 5c at the end of the melody, and thereby the melody written in the note memory 13 will be preset. Finally, write the delimiter code. FIG. 4a explains the above operation.

Next, accurate flag data for autoplay,
In order to write each note length data to the note memory 13, set the recording mode by keeping the mode changeover switch 9 switched to the changeover position REC, and also generate a rhythm and perform one-key play according to this rhythm. A melody performance will be performed.
In this case, first, the address counter 14 is reset by operating the key AC, and address 0 of the note memory 13 is addressed. Next, when the rhythm is a march, the rhythm of this march is specified by the keys RHY, 1□. At this time, the control section 13 outputs address data for the area for storing the march rhythm pattern to the rhythm pattern storage section 29, and the rhythm pattern storage section 29
From then on, reading of the march rhythm pattern is started and provided to the rhythm generating section 30. Therefore, the march sound starts to be emitted from the speaker 31.

Next, the one-key play key M+5b or the one-key play key 5c is used to accurately perform the one-key play melody performance described above in conjunction with the rhythm being emitted. The melody played in this case is the melody previously written in the note memory 13. For example, if key M+5b is first turned on, a "1" signal 1key is output in response, and OR gate 18,
The signals are respectively given to the envelope control section 22 . Further, the scale data 1 of the first note is read from address 0 of the note memory 13 and is applied to the area 15A of the buffer 15 and the code converters 24 and 26, respectively. As a result, the musical tone of pitch A ₃ becomes key M+5b.
During the on operation, the ADS section of the envelope is created and emitted. Also, during this time, the tone length counter 17 measures the ON time for pitch A ₃ (scale data 1). Then, when key M+5b is turned off, the signal 1key becomes "0", and in response to this, the envelope control section 22 starts creating the release section, while the on-time of the tone length counter 17 is
The signal is taken into the ADS buffer 19, and then the note length counter 17 continues its timekeeping operation. Next, for example, if the 1 key play key 5c is turned on, the signal 1key is inverted to "1". At this time,
The address counter 14 is incremented by 1, and address 1 will be addressed from now on. Also, when the 1 key play 5c is turned on, the on time and whole tone duration for the first note pitch _A3 are compared in the comparison circuit 16, and as described above, if the on time ≦ the off time, the on time is set to "0". , if on time>off time, the comparison result data of "1" is output and given to area 15B of buffer 15 as flag data. In addition, the whole tone duration is input in area 15C, which causes 1
When the key play key 5c is turned on, the note memory 13
At address 0, scale data 1, flag data (“0” or “1”), and tone length data are written via the buffer 15. At this time, both the written flag data and note length data are
This provides accurate musical tone information desired by the performer.

The note length counter 17 is reset when the 1 key play key 5c is turned on, and starts counting the on time for the musical tone of the second note, and the ADS part of the musical tone of pitch _B3 of the second note is output from the speaker 31. is being created and emitted. The melody playing operation using the following one-key play keys is the same as above,
Each time the one-key play key is turned on, new scale data is read out from the note memory 13, and the creation of accurate flag data and note length data is started. The flag data and note length data are written into the original address area of the note memory 13 together with the scale data. When the melody performance is finished, the delimiter code is finally written into the note memory 13 again by the above-mentioned key operation. With the above operations, the writing operation of the autoplay flag data and tone length data is completed. FIG. 4b explains the above-mentioned operation.

Next, if the autoplay melody performance is to be performed only once, the mode changeover switch 9 is switched to the switching position PL and the performance mode is set. Then, operate keys AC and M- continuously. At this time, the signal AUTO, which is the start command for auto play, is activated.
(“1”) is output and given to the control unit 11 and the auto-play repetition control unit 28, respectively. Also, the address counter 14 is reset and the note memory 1
Address 0 of 3 is addressed. In this case,
Thereafter, the autoplay repeat control section 28 executes an operation to perform the melody performance only once, that is,
Outputting a melody start signal ST and giving it to the control unit 11 only once when the signal AUTO is output,
Also, the repetitive signal RP is not output.

After outputting the melody start signal ST, the control section 11 sends a +1 signal to the envelope control section 22.
It is now output every time the end signal e is output from , that is, every time one musical tone is created and emitted, and accordingly, one set of scale data, flag data, and tone length data for each note (one musical tone) is output. are sequentially read out from the note memory 13. In this case, the read scale data is
Code conversion units 24, 26 and break detection unit 27
and undergoes the various processes described above. Also,
During this auto play, “1” is sent from the control unit 11.
The gate control signal g is output to the gate circuit 20.
Therefore, both the flag data and the note length data read from the note memory 13 are provided to the note length dividing section 21 via the gate circuit 20. Then, when the input flag data is “0”, the tone length dividing unit 21 divides the envelope into
The tone length data is divided so that the ADS part and the R part are both equal, and the signals E1 and E with the same content are
2 is obtained and given to the envelope control unit 22, and when the input flag data is "1", the above
Signals E1 and E2 obtained by dividing the note length data so that the ratio of the ADS part to the R part is 3:1 are outputted and given to the envelope control part 22. Therefore, in the former case, a musical tone in which the ADS portion and the R portion are equal is emitted, while in the latter case, a musical tone in which the ADS portion is three times longer than the R portion is emitted.

As described above, the melody performance by autoplay is executed, and when the melody performance ends, the delimiter code is detected by the delimiter detection section 27, the signal EM ("1") is output, and the autoplay repeat control section 28, and the autoplay operation is completely completed. FIG. 4c explains the above-mentioned operation.

On the other hand, when performing an autoplay melody performance repeatedly, for example four times, after setting the performance mode, the keys 4□, C□, and M- are operated. As a result of this key operation, the number of performances (4) is set in the autoplay repeat control section 28, the address counter 14 is reset, and the melody performance is started. Then, the melody performance is performed in accordance with the same operation as in the case of one autoplay described above. Then, each time the melody performance ends, a signal is output from the break detection section 27.
While EM is counted by the auto-play repeat control unit 28, the auto-play repeat control unit 28 outputs a repeat signal RP (“1”) and performs control until the counted value matches the set number of times 4. 11 to continue playing the melody. and 4
When the melody performance is completed, the autoplay repeat control section 28 detects that the count value matches the set number of times 4, and accordingly, the repeat signal RP becomes "0". Therefore, the control section 11 stops outputting the +1 signal, and the repeating operation of the melody performance ends.

In the above embodiment, only one melody can be stored in the note memory 13, but of course a plurality of melodies may be stored. In this case, be sure to write a delimiter code at the end of the song, and if you want to play it repeatedly, you can play a series of multiple songs multiple times, or you can repeat only a specified song multiple times. It is also possible to play the music. In addition, in the above embodiment, the envelope
Although the ratio of the ADS part to the R part is set to 1:1 or 3:1, it is of course not limited to this. Furthermore, the present invention is applicable not only to small-sized electronic calculators having a musical sound generation function but also to various other similar small-sized electronic devices.

As explained above, the present invention outputs code data corresponding to the ratio of the on-operation time and the off-operation time of a read key for reading scale data from a storage means, and uses this code data as envelope control data to generate the scale data. Since the notes are stored in correspondence with the notes, the note length can be easily inputted, and the data stored in the autoplay memory can be compressed, which improves memory usage efficiency.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of a small electronic calculator according to an embodiment of the present invention, Fig. 2 is a circuit diagram of the main parts, Fig. 3 is a flowchart explaining the operation of one-key play, and Fig. 4 is an automatic This is a flowchart explaining the operation of the play. 2...Key input section, 3...Display section, 4...Sound emitting section,
5, M+...One-key play key, M-...Auto play key, 9...Mode changeover switch, 11...Control unit, 12...Calculation storage unit, 13...Musical note memory, 14
...Address counter, 15...Buffer, 16...Comparison circuit, 17...Tone length counter, 19...ADS buffer, 21...Tone length division section, 22...Envelope control section, 23...Tone generation section, 24, 27...Code conversion section , 27... Separation detection section, 28... Auto play repetition control section, 29... Rhythm pattern storage section, 3
0...Rhythm generation section.

Claims (1)

[Scope of Claims] 1. A storage means for storing scale data input by operating a scale key, and a device for sequentially reading scale data from the storage means each time a read key is operated, and generating a corresponding musical tone. a readout control means for controlling; a first time detection means for detecting the on time while the readout key is being operated; and an operation time from the current readout key on operation to the next readout key on operation; a second time detection means for detecting the on-time and the operation time; an output means for outputting code data corresponding to the ratio of the on-operation time and the off-operation time of the current read key, based on the on-time and the operation time; and storage control means for storing the operation time as tone length data and the code data as envelope control data in the storage means in correspondence with the scale data read out by the current operation of the readout key. A small electronic device with a melody memory function.