JP2668761B2 - Electronic musical instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument, and more particularly to a technique for playing a plurality of demonstration songs in a predetermined order using a small number of operators.

[0002] In recent years, electronic musical instruments such as electronic pianos, electronic organs, electronic keyboards, and the like have been developed and widely spread. In such an electronic musical instrument, a demonstration song is generally built in, and the song can be automatically played by selecting a desired song from the operation panel.

By the way, since such electronic musical instruments not only simply generate musical tones but also have various functions such as changing the tone color, changing the volume, changing the rhythm, etc. The operator is provided.

[0004] However, providing a large number of operators has the drawback of increasing costs and complicating the operation. Therefore, there is a demand for an electronic musical instrument having a reduced number of controls and a simple operation, and a control for instructing a demonstration performance is no exception.

In particular, a simple electronic musical instrument, for example, a musical instrument called an electronic mini piano produced for the purpose of accustoming an infant to the musical instrument has a strong demand for the above.

[0006]

2. Description of the Related Art Conventionally, in an electronic musical instrument containing a plurality of demonstration songs, the following functions are known as a function for playing a desired demonstration song.

The first is that only one operator is provided for instructing the start or stop of the demonstration performance, and when the operation is instructed by the operator, all the built-in demonstration songs are arranged in a predetermined order. It is a function to play repeatedly in sequence.

According to this function, the demonstration performance can be started easily, but there is a drawback that it is not possible to repeatedly play only the desired music.

Secondly, as many operators as the number of music pieces are provided to instruct the start or stop of the performance of each demonstration song, and when any one of the operators is operated, the demonstration song corresponding to the operator is repeatedly played. It is a function to do.

According to this function, it is possible to easily select a desired piece of music and repeatedly perform the demonstration performance, but it is necessary to provide operators as many as the demonstration pieces, which causes a cost increase.

In both the first and second cases,
It was not possible to select multiple desired songs from all the demonstration songs and make them repeat.

[0012]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is inexpensive and can be operated repeatedly by selecting one or more desired demonstration songs with a small number of operators. An object of the present invention is to provide an electronic musical instrument having excellent performance.

[0013]

In order to achieve the above object, an electronic musical instrument according to the first aspect of the present invention includes a demo song selecting means provided corresponding to a plurality of demo songs and a normal keyboard performance. Demo performance instructing means having a demo switch for instructing demo performance, demo song determining means for determining a demo song to be played, and automatic performance means for automatically performing the demo song determined by the demo song determining means. , A demo song is selected by the demo song selecting means while the demo switch of the demo playing instruction means is turned on, only the selected demo song is played, If a demo song is not selected by the demo song selecting means while the demo switch is turned on, a predetermined demo song is selected and played.

[0014] For the same purpose, an electronic musical instrument according to a second aspect is characterized in that the demonstration music selecting means according to the first aspect is constituted by a plurality of keys specified on a keyboard device.

[0015]

According to the first aspect of the present invention, a change in the state of the instructing means accompanying the operation of the instructing means is determined, and the performance mode, for example, the type of music to be demonstrated, is determined according to the state of the switch means in each of the determined states. And the presence or absence of repeated performance.

Thus, for example, one or a plurality of songs or all songs specified by the switch means are performed once or repeatedly. That is, it is possible to extract only a desired demonstration piece (one piece or a plurality of pieces) and play it once or a plurality of times, thereby realizing an electronic musical instrument having excellent operability.

According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of specific keys of a keyboard device are used as switch means for indicating a demonstration song.

As a result, there is no need to provide a special operator for selecting a demonstration music piece, so that a demonstration performance function can be realized at low cost and the operation is simple.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of an electronic musical instrument according to the present invention. In the figure, reference numeral 10 denotes a keyboard device. The keyboard device 10 is used for instructing the pitch of a musical tone when performing a normal performance (hereinafter referred to as "normal performance mode").

The keyboard device 10 is also used as a means for selecting a demonstration song in a mode for performing a demonstration performance (hereinafter referred to as "demo performance mode") which is directly related to the features of the present invention (details will be described later). Do).

A signal from the keyboard device 10 indicating ON / OFF of each key is a bit string corresponding to each key under the control of a central processing unit (hereinafter referred to as "CPU") 12,
A random access memory (hereinafter referred to as “R
AM ”) 15.

Reference numeral 11 denotes an operation panel, which is constructed as shown in FIG. 2, for example. In FIG. 2, reference numeral 30 is a volume that also serves as a power switch. This volume 30
The power is off at the leftmost position in the figure, and the power is turned on by turning the switch to the right from this position, and the volume is controlled to be increased by turning it further to the right.

Reference numeral 31 is a push button switch (hereinafter referred to as "demo switch") for starting the demonstration performance. As will be described later, the demo switch 31 is used to change the state of the electronic musical instrument as it is pressed or released and to specify various playing modes.

In FIG. 2, guidance other than the above-mentioned volume 30 and demo switch 31 is guidance printed or stamped on the surface of the operation panel 11. The number on the black key corresponds to the song number (song No.). For example, when the black key of the number “6” is pressed, the song of the song number (song No.) “6” is demonstrated. Will be. In the following description, among the keyboard devices 10, black keys numbered "1 to 10" are particularly referred to as music selection keyboards.

The state of the volume 30 of the operation panel 11 is stored in the RAM 15 via the bus 20 under the control of the CPU 12 as its rotational position information. Similarly, the pressed or released state of the demo switch 31 is stored as ON / OFF information in the RAM 15 via the bus 20 under the control of the CPU 12.

The CPU 12 controls the entire electronic musical instrument in accordance with a control program stored in a read only memory (hereinafter referred to as "ROM") 14. The control of the demonstration performance according to the present invention is also realized by the processing of the CPU 12 (details will be described later). The CPU 12 can access each component via the bus 20.

A timer 13 generates an interrupt request signal to the CPU 12 at intervals of several milliseconds, for example. This timer 13 is used for measuring 5 seconds.

The ROM 14 stores not only the control program for controlling the CPU 12 described above, but also waveform data of musical tones to be generated, tone color data, and various other fixed data. The ROM 14 also stores automatic performance data for demonstration performance according to the features of the present invention. The content stored in this ROM 14 is C
It is accessed by the PU 12 via the bus 20.

The RAM 15 temporarily stores various data necessary for executing the control program, and various flags, registers, counters and the like used in this embodiment are also defined in the RAM 15.

Reference numeral 16 is a tone generation circuit, which generates a digital tone signal in accordance with tone information sent from the CPU 12 via the bus 20 and indicating tone pitch and volume. The digital tone signal generated by the tone generating circuit 16 is sent to the D / A converter 17.

The D / A converter 17 is a well-known D / A converter that converts an input digital signal into an analog signal and outputs the analog signal. The tone signal converted into an analog signal by the D / A converter 17 is supplied to an amplifier 18.

The amplifier 18 is a well-known amplifier that amplifies an input analog tone signal at a predetermined amplification rate and outputs the amplified signal. The analog musical tone signal amplified by the amplifier 18 to a predetermined level is supplied to the speaker 19.

The speaker 19 is a well-known one which converts an analog musical tone signal as an electric signal into an acoustic signal. The speaker 19 emits a musical sound corresponding to the pressing of a key on the keyboard device 10, and also plays a designated demonstration song.

The keyboard device 10 and the operation panel 1
1, CPU 12, timer 13, ROM 14, RAM 15
The tone generation circuit 16 and the tone generation circuit 16 are connected to each other via a bus 20.

Next, the operation of the electronic musical instrument according to the present invention having the above structure will be described. First, demo switch 31
With reference to the state transition diagram shown in FIG. 3, the state of the electronic musical instrument which changes according to whether or not 5 seconds elapse due to the pressing and releasing of the music selection key, the pressing of the music selection keyboard, and the timer 13 counting will be described.

First, immediately after the power is turned on, the electronic musical instrument is in a performance stopped state (S1). This performance stopped state (S
1) is a state in which the electronic musical instrument is in a normal performance mode, in which all keys of the keyboard device 10 can generate sound.

When the demo switch 31 is pressed in the performance stopped state (S1) (while the demo switch 31 is kept pressed, it does not separate).
The process proceeds to the state of selecting a chain music (S2).

The state in which a chain music piece is being selected (S2) is a state for selecting a music piece for which a demonstration performance is to be performed. Here, the chain song is a plurality of songs for which demonstration performances should be continuously performed. When the music selection keyboard is pressed in the chain music selection state (S2), the fact that the music corresponding to the key is selected is stored. In this state, a plurality of demonstration songs can be selected. In this state, no sound is produced even if a key other than the music selection keyboard is pressed.

In the chain tune selection state (S2), when the demo switch 31 is released after tune selection by the tune selection keyboard, the chain performance state (S5) is entered. On the other hand, if the demo switch 31 is released without selecting a song using the song selection keyboard, the state shifts to the one song selection state (S3).

The one-music-in-selection state (S3) is a state for selecting the demonstration music of only one music. If any key of the song selection keyboard is pressed within 5 seconds after entering the one song selection state (S3), a demonstration song corresponding to the key is selected, and one song performance state (S3) is selected.
Go to 4).

The one music performance state (S4) is a state in which one selected demonstration music piece is played. When the performance of the selected music piece ends, the state shifts to a performance stopped state (S1). Also, in this one-music playing state (S4), even when the demo switch 31 is pressed, the performance is stopped (S1).

If the demo switch 31 is depressed within 5 seconds after entering the above-mentioned single-tune selection state (S3), the whole-music playing state (S6) is entered. In addition, the one song is being selected (S3)
Even if the music selection keyboard is not depressed even after 5 seconds have passed since the entry, the all music performance state (S6) is entered.

The all-song playing state (S6) is a state in which the fact that all of the demonstration songs contained therein have been selected is stored. When the processing in the all-music playing state (S6) is completed, the processing unconditionally proceeds to the chain playing state (S5).

In the chain playing state (S5), when the demo switch 31 is released after the song is selected in the chain song selecting state (S2), or the predetermined process is completed in the all song playing state (S6). It is a state that enters the case. In this chain performance state (S5), the selected one or more songs or all songs are repeatedly played in a predetermined order. In this chain performance state (S5), the demo switch 31
When is pressed, the state shifts to a performance stopped state (S1).

Next, while realizing the above state transition,
The specific processing for performing the demonstration performance will be described in detail with reference to the flowcharts shown in FIGS. In the following, only the portions related to the present invention are shown in the drawings and will be described.

(1) Main Processing FIG. 4 shows a main routine of the electronic musical instrument according to the present invention, which is started when the power is turned on. That is, when the power is turned on, first, the initial setting process is performed (step S1).
0).

In this initial setting process, first, the flag for storing the transition state is set to the initial value. That is, the normal state flag for storing that the performance is being stopped (S1) is set to "1", and the chain selecting flag for storing that the chain is being selected (S2) is selected. S3) 1 song selection flag that stores
A chain playing flag that stores the chain playing state (S5) and a single song playing flag that stores the single song playing state (S4) are set to "0".

Also, it is instructed whether or not to measure 5 seconds.
The second counting flag and the 5 second elapsed flag for storing whether 5 seconds have elapsed are set to "0".

Further, the performance start request flag for requesting the start of performance is set to "0".

In the processing of this electronic musical instrument, flags other than those mentioned above are also used, but these will be described whenever necessary. In this initial setting process, in addition to the initial setting of the above-mentioned flags, a process of setting initial values to various buffers and registers provided in the RAM 15 and a process of giving predetermined data to the musical tone generating circuit 16 are described. Processing for suppressing unnecessary sound from being generated is performed.

When the initial setting process is completed, it is checked whether or not there is a panel event (step S11).
This is performed by a panel scan circuit (not shown) that turns the volume 30 on and off, and turns on / off the demo switch 31.
This is done by taking in information indicating the off state, comparing it with the previously taken in information, and checking whether or not there is a change.

If it is determined that there is a panel event, panel processing is performed (step S1).
2). Details of this panel processing will be described later. On the other hand, when it is determined that there is no panel event, the panel processing (step S12) is skipped.

Then, it is checked whether or not there is a key event (step S13). This is performed as follows. That is, the keyboard device 10 is scanned by a key scan circuit (not shown). As a result, the key depression information is fetched as a bit string corresponding to ON or OFF of each key.

Next, the previously depressed key information and the currently depressed key information are compared to determine whether or not there is a different bit. Then, if there are different bits, it is determined that there is a keyboard event.

If it is determined that there is a key event, keyboard processing is performed (step S14). The details of this keyboard processing will be described later. On the other hand, if it is determined that there is no key event, the keyboard process (step S14).
Is skipped.

Next, a 5-second progress confirmation process is performed (step S15). This is a process of determining whether or not 5 seconds have passed after entering the one song selection state (S3) and shifting to the all song playing state (S6) after 5 seconds have elapsed. This 5
The details of the second elapse confirmation processing will be described later.

Next, automatic performance processing is performed (step S16). That is, when the electronic musical instrument reaches the sound generation or mute timing, the automatic performance data of the demonstration music stored in the ROM 14 is read out, and the sound generation or mute is performed. When the automatic performance process is completed, the process returns to step S11, and a normal performance or a demonstration performance is realized by repeating the same process.

(2) Panel Processing Next, the details of the panel processing performed in step S12 will be described with reference to the flowchart of FIG.

In the panel process, first, it is checked whether or not the generated panel event is an event of the demo switch 31 (step S20). And demo switch 3
If it is determined that the event is not the event of volume 1,
Recognizing that the event is 0, volume processing is performed (step S21). This volume processing is not directly related to the gist of the present invention, so a detailed description will be omitted.
Thereafter, the process returns from the panel processing routine.

On the other hand, if it is determined in step S20 that the event is the event of the demo switch 31, it is checked whether or not the demo switch 31 is pressed (step S).
22). This is performed by checking whether the on / off information from the demo switch 31 has changed from “0” to “1”.

When it is determined that the demo switch is pressed (changed from "0" to "1"), the demo switch pressing process is performed (step S23). On the other hand, when it is determined that the demo switch 31 is not pressed (change from "1" to "0"), it is recognized that the demo switch 31 is released, and the demo switch release process is performed (step S).
24).

In the demo switch pressing process, as shown in FIG. 6, first, it is determined whether or not the one-track playing flag is "1", that is, whether or not the one-track playing state (S4) in FIG. Is checked (step S30).

When it is determined that the one song playing flag is "1", it is recognized that the demo switch 31 has been pressed in the one song playing state (S4), and the one song playing flag is set to "1". It is set to "0", the normal state flag is set to "1" (step S31), and the process returns from this demo switch pressing process routine. As a result, the state of the electronic musical instrument is changed from the one-music performance state (S4) to the performance stop state (S1).
Will be transitioned to

If it is determined in step S30 that the one-track performance flag is not "1", it is determined whether or not the chain performance flag is "1", that is, the chain performance state (S5) in FIG. It is checked whether or not there is (step S32).

When it is determined that the chain playing flag is "1", it is recognized that the demo switch 31 has been pressed in the chain playing state (S5), and the chain playing flag is set to "0". The normal state flag is set to "1" (step S33), and the process returns from the demo switch pressing processing routine. As a result, the state of the electronic musical instrument changes from the chain performance state (S5) to the performance stop state (S1).

If it is determined in step S32 that the in-chain performance flag is not "1", it is determined whether the one-track selection flag is "1", that is, the one-track selection state in FIG. 3 (S3). ) Is checked (step S34).

When it is determined that the one song selection flag is "1", it is recognized that the demo switch 31 has been pressed within five seconds after entering the one song selection state (S3). The 5-second measurement flag is set to “0” (step S
35). Thereby, in the following, the measurement for 5 seconds is stopped. Then, all-music performance processing is performed (step S36).

In the all-music performance process, as shown in the flowchart of FIG. 10, first, the one-music selection flag is set to "0", and the chain performance flag is set to "1" (step S90). Then, the song selection flags for all the songs are set to "1" (step S91). Here, the music selection flag is a flag provided in the RAM 15 corresponding to each key of the ten music selection keyboards.

Then, the register for storing the performance song number is initialized to "1" (step S92). This register is provided in the RAM 15 and is used for searching for the music number of the music to be performed for the demonstration performance.
This register stores, as a result of the search, the song number (song No.) of the currently playing demonstration song. Here, the music number "1" is set as an initial value.

Then, the performance start request flag is set to "1" (step S93). As a result, the automatic performance of the demonstration piece is started in the automatic performance processing routine described later.

When the above processing is completed, the routine returns from the all-music playing processing routine and the demo switch pressing processing routine. As a result, the state of the electronic musical instrument changes from the state in which one music piece is selected (S3) to the chain performance state (S5) via the all-music performance state (S6), and is sequentially demonstrated from the music number "1". The performance will be performed.

If it is determined in step S34 that the one-track selection flag is not "1", it is determined whether the normal state flag is "1", that is, the performance stop state (S1) in FIG. It is checked whether or not there is (step S3).
7). If it is determined that the normal state flag is not "1", no processing is performed and the process returns from this demo switch processing routine.

On the other hand, when it is determined that the normal state flag is "1", it is recognized that the demo switch 31 has been pressed in the performance stop state (S1), and the normal state flag is set to "0". Then, the chain selection flag is set to "1" (step S38). As a result, the state of the electronic musical instrument transits from the performance stopped state (S1) to the chain song selected state (S2).

Next, the song selection flags for all the songs are set to "0" (step S39). As a result, the selected state of the demonstration song becomes the initial state, and the desired song is selected by the song selection operation (processed by the keyboard processing routine) performed below. Next, the music selection flag is set to "0" (step S40). As a result, an automatic performance, that is, a demonstration performance is performed in the automatic performance processing routine.

The demo switch pressing process is completed by the above series of processes, and the process returns to the main routine via the panel processing routine.

In the demo switch separation processing, as shown in FIG. 7, first, it is determined whether or not the chain selection flag is "1", that is, the chain music selection state in FIG.
It is checked whether or not it is in 2) (step S50). When it is determined that the chain selection flag is not "1", no processing is performed and the demo switch separation processing routine returns.

That is, the state transition accompanying the release of the demo switch 31 can occur only in the state of selecting the chain music (S2). In other states, the event accompanying the release of the demo switch 31 is ignored. Is done.

When it is determined in step S50 that the chain selection flag is "1", it is checked whether or not the selected song existence flag is "1" (step S5).
1). In other words, it is checked whether or not the demonstration song is already selected by the song selection keyboard.

Here, when it is determined that the selected music existence flag is "1", it is recognized that the demo switch 31 has been released after the music selection has been performed in the chain selection state (S2). The chain selection flag is set to "0" and the chain playing flag is set to "1" (step S5).
4). Next, "1" is stored in the register for storing the music number.
Is set (step S55), and the performance start request flag is set to "1" (step S56).

As a result, the state of the electronic musical instrument changes from the state of selecting a chain music (S2) to the state of chain performance (S5).
The automatic performance of the demonstration music selected in the automatic performance processing routine to be described later is started.

If it is determined in step S51 that the selected song presence flag is not "1", it is recognized that the demo switch 31 has been released without selecting a song in the chain selection state (S2). Then, the chain selection flag is set to "0", and the one-track selection flag is set to "1" (step S52).

Next, the 5-second measurement flag is set to "1", the 5-second elapsed flag is set to "0", and the 5-second measurement counter is equal to the number of interrupts generated from the timer 13 in 5 seconds. A numerical value is set (step S53).

Here, the 5-second measurement counter is stored in the RAM 15
Is a counter provided in the, and is counted down by an interrupt from the timer 13.

When the above processing is completed, the process returns from this demo switch separation processing routine. As a result, the state of the electronic musical instrument changes from the chain song selection state (S2) to 1
The state transits to the song selection state (S3), and the measurement of the time of 5 seconds is started.

(3) Keyboard Processing Next, the keyboard processing performed in step S14 of the main routine will be described with reference to the flowchart of FIG.

This keyboard processing routine is called when the main routine determines that a key event has occurred.

In the keyboard processing, first, it is checked whether or not the chain music selection flag is "1" (step S6).
0). When it is determined that the chain song selection flag is "1", it is checked whether or not the key event is a key depression event (step S61). here,
If it is determined that it is not the key depression event, that is, the key release event, no processing is performed and the process returns from this keyboard processing routine.

On the other hand, if it is determined that the key-depressing event has occurred, it is checked whether or not the pressed key is the music selection key (step S62). If it is determined that the keyboard is not a music selection keyboard, the process returns from this keyboard processing routine without performing any processing. That is, during the selection operation of the chain music, there is no response even if a key other than the music selection keyboard is pressed, and no sound is generated.

If it is determined in step S62 that the pressed keyboard is a song selection keyboard, the song selection flag corresponding to the selected song is set to "1" (step S63). Next, the music selection flag is set to "1" (step S64), and thereafter, the process returns from the keyboard processing routine. As a result, the demonstration tune selected by the tune selection keyboard is stored, and when the state shifts to the chain performance state (S5), the demonstration tune of the tune is performed.

When a plurality of music pieces are selected, when any key of the music piece selection keyboard is pressed, the keyboard processing routine is called again, and the above-described series of processing is performed.

When it is determined in step S60 that the chain selection flag is not "1", whether or not the one music selection flag is "1", that is, one music selection state (S
It is checked whether or not it is in 3) (step S65). Here, when it is determined that the one song selection flag is "1", it is checked whether or not the key event that caused the keyboard processing routine to be called is a key pressing event (step S66). ).

If it is determined that it is not a key-depression event, that is, a key-release event, the keyboard processing routine is returned without performing any processing.

On the other hand, if it is determined that the key-depression event has occurred, it is checked whether or not the depressed key is the music selection key (step S67). If it is determined that the keyboard is not a music selection keyboard, the process returns from this keyboard processing routine without performing any processing. That is, during the operation of selecting one music, there is no response even if a key other than the music selection keyboard is pressed, and no sound is generated.

If it is determined in step S67 that the pressed keyboard is a music selection keyboard, the music selection flag corresponding to the selected music is set to "1" (step S68). Next, the flag for selecting one song is set to "0", and the flag for performing one song is set to "1" (step S69). Thereby, the state of the electronic musical instrument is
The state in which one song is being selected (S3) is changed to the one song playing state (S4).

Next, the register for storing the performance music number is initialized to "1" (step S70), and the performance start request flag is set to "1" (step S71). Then, the 5-second measurement flag is set to "0" (step S7).
2) Then, the process returns from this keyboard processing routine.

As described above, the demonstration tune selected by the tune selection keyboard is stored, and one tune is played (S4).
Then, the demonstration performance of the song will be performed once.

If it is determined in step S65 that the one-piece selection flag is not "1", the normal musical performance mode is set (the state of the electronic musical instrument is the performance stopped state (S1)).
(In step S73), it is checked whether or not the key event that caused the keyboard processing routine to be called is a key pressing event (step S73).

When it is determined that the event is a key depression event, sound generation processing is performed (step S74).
Return from this keyboard processing routine. The pronunciation process is
This is a process of generating a musical tone by sending information regarding the depressed key to the musical tone generating circuit 16. This sound generation process is a well-known technique, and a description thereof will be omitted.

On the other hand, if it is determined in step S73 that the event is not the key depression event, it is recognized that the event is the key release event, and the mute processing is performed (step S75). Thereafter, the process returns from the keyboard processing routine. The sound deadening process is a process of sending the information about the released key to the musical sound generating circuit 16 to stop the musical sound being generated. Since this muffling process is also a well-known technique, its description is omitted here.

(4) Five Second Elapse Confirmation Process Next, the five second elapse confirmation process performed in step S15 of the main routine will be described with reference to the flowchart of FIG.

This 5-second passage confirmation processing routine is called at a constant cycle in the main routine.

In the five-second progress confirmation process, it is first checked whether or not the five-second progress flag is "1" (step S8).
0). This 5-second elapsed flag indicates that one song is being selected (S3).
It is a flag that is set when 5 seconds have passed.

That is, when the chain music is being selected (S2), 5
When the second measurement flag is set to "1" (then, the state shifts to the state of selecting one piece of music (S3)), the timer is started in a timer interrupt processing routine to be described later. The progress flag is set.

In step S80, if it is determined that the 5-second elapsed flag is "1", that is, it is determined that 5 seconds have elapsed since the state of entering one music selection state (S3), the 5-second elapsed flag and the 5-second elapsed flag are set. Both measurement flags are set to "0" (step S81). Next, all music performance processing is performed (step S8).
2). As described above, this all-music performance process is a process of setting predetermined flags and registers to play all the music. After the completion of this all-music performance processing, the routine returns from this 5 second progress confirmation processing routine.

Therefore, upon completion of the above processing, the state of the electronic musical instrument shifts to the chain performance state (S5) through the all-music performance state (S6).

If it is determined in step S80 that the 5 second elapsed flag is not "1", no processing is performed and the process returns from the 5 second elapsed confirmation processing routine.

(5) Automatic Performance Process Next, the automatic performance process performed in step S16 of the main routine will be described with reference to the flowchart of FIG.

This automatic performance processing routine is called in a fixed cycle in the main routine.

In the automatic performance processing, first, it is checked whether or not the performance start request flag is "1" (step S1).
00). This performance start request flag is a flag that is set when entering the state of performing the demonstration performance.

Specifically, the chain music selection state (S
When entering the chain performance state (S5) from 2), when entering the chain performance state (S5) from the one music selection state (S3) via the all music performance state (S6), and when selecting one music state (S3) Are set when entering one music performance state (S4).

If it is determined in step S100 that the performance start request flag is "1", performance start processing is performed (step S101). If it is determined that the performance start request flag is not "1", this performance start processing is skipped.

Details of the performance start processing are shown in the flowchart of FIG. In the performance start processing, a search is made for a music number to be played. That is, first, the register for storing the performance music number is referred to check whether or not the music having the performance music number set in the register is selected (step S).
110). This is performed by checking whether or not the music selection flag corresponding to the music number set in the register is set.

Here, if it is determined that the music of the music number is not selected, "1" is added to the music number set in the register (step S111). Then, it is checked whether or not the addition result exceeds the maximum number of songs, that is, “10” (step S112). If it is determined that the maximum number of songs is not exceeded, step S
Returning to step 110, the same processing is repeatedly executed.

When the selected performance music number is found in the course of this repeated execution, the head address where the automatic performance data of the music is stored is set (step S1).
14). That is, in order to read out the automatic performance data corresponding to the searched performance music number from the ROM 14, the head address thereof is set in a predetermined register. This address will be used as the read address of the automatic performance data in the subsequent processing.

In the process of repeatedly executing steps S110 to S112, if it is determined in step S112 that the maximum number of music pieces has been exceeded, the performance music piece number is initialized to "1", and the process returns to step S110 to return to the above. The same processing is performed.

When the above performance start processing is completed, the process returns to the automatic performance processing routine, and it is checked whether or not it is the timing to mute the sound (step S102). This is performed by comparing the data indicating the sound generation timing in the automatic performance data with the time of a clock mechanism (not shown).

When it is determined that it is the timing to mute, the mute processing is performed (step S10).
3). This mute processing is a well-known one which is performed by sending the automatic performance data read from the ROM 14 to the musical tone generating circuit 16. If it is determined that it is not the timing to mute, the mute process (step S1) is performed.
03) is skipped.

Next, it is checked whether or not the chain playing flag is "1", that is, whether or not the chain playing state (S5) is in effect (step S104).

When it is determined that the chain performance flag is not "1", it is determined whether the one music performance flag is "1", that is, whether or not the one music performance state (S4). It is checked (step S105). If it is determined that the one-track playing flag is not "1", it is recognized that neither the chain playing state (S5) nor the one-track playing state (S4) is in effect. Return from the processing routine.

On the other hand, the above step S104 or S105
If it is determined that the chain playing flag is "1" or the one song playing flag is "1", it is checked whether or not it is a sounding timing (step S106).
This is performed in the same manner as the above-mentioned mute timing.

When it is determined that it is the sounding timing, sounding processing is performed (step S10).
7). This tone generation process is a well-known process performed by sending the automatic performance data read from the ROM 14 to the tone generation circuit 16. If it is determined that it is not the timing of sounding, the above-described sounding process (step S1
07) is skipped.

Next, it is checked whether or not the pronunciation of one tune, that is, the demonstration performance of one tune has ended (step S108). This is done by checking whether the automatic performance data includes a code indicating the end. Here, if it is determined that the music piece is to be ended, music piece end processing is performed (step S109).

Details of the music end processing are shown in the flowchart of FIG. In the music end processing, first, it is checked whether or not the one music performance flag is "1" (step S120).

When it is determined that the one-piece playing flag is "1", in the one-piece playing state (S4),
Recognizing that the demonstration performance for one music has ended, the performance flag for one music is set to "0", the normal state flag is set to "1" (step S125), and thereafter, the program returns from the music end processing routine. . This gives 1
The state transitions from the music performance state (S4) to the performance stopped state (S1).

On the other hand, if it is determined in step S120 that the one-piece playing flag is not "1", it is recognized that the one-piece demonstration performance has ended in the chain playing state (S5), and Is added to the music number stored in step S12 (step S12).
1).

The addition result is the maximum number of music pieces, that is, "1.
"0" is checked (step S12).
2). If it is determined that the maximum number of songs has been exceeded,
The music piece number is initialized to "1" (step S123),
The performance start request flag is set to "1" (step S
124). As a result, the demonstration song having the first song number is played.

After that, the process returns from this music end processing routine. When it is determined in step S122 that the maximum number of pieces of music has not been exceeded, the performance start request flag is set to "1", and the routine returns from this piece of music ending processing routine. In this case, the demonstration song next to the song that has finished playing will be played.

(6) Timer Interrupt Processing Next, the timer interrupt processing will be described with reference to the flowchart of FIG.

This timer interrupt processing routine is performed by the timer 1
Called when an interrupt signal is output from 3.
In this timer interrupt process, it is first checked whether or not the 5-second measurement flag is "1" (step S13).
0). In other words, it is checked whether or not one song is being selected (S3).

When it is determined that the 5-second measurement flag is "1", "1" is subtracted from the 5-second measurement counter (step S131). Then, it is checked whether or not the 5-second measurement counter has reached "0" (step S13).
2) If it is determined that the value has become "0", the 5-second elapsed flag is set to "1" and the 5-second measurement flag is set to "0" (step S133).

In the one song selection state (S3), it is determined whether or not five seconds have elapsed since entering the one song selection state (S3) by referring to the five-second elapsed flag. Become.

If it is determined in step S130 that the 5-second measurement flag is not "1", or if it is determined in step S132 that the content of the 5-second measurement counter is not "0", , And returns from this timer interrupt processing routine without performing any processing.

In the above embodiment, the transition to another state is made when 5 seconds elapse in the state where one music piece is being selected, but the time is not limited to 5 seconds. Any time can be used in consideration of the speed at which a person operates the switch.

When performing a chain performance of a plurality of songs,
Although the configuration is such that the music pieces are played in ascending order of the music numbers, for example, the demonstration performance may be performed in the order of the selected music pieces. This can be easily realized by storing the order of selection.

Further, in the above-described embodiment, a case has been described in which automatic performance data for ten demonstration songs is provided. However, the number of songs is not limited to the above, and an arbitrary number can be provided. .

[0137]

As described in detail above, according to the present invention, an electronic musical instrument which is inexpensive and has excellent operability can be selected and played repeatedly with a small number of operators for one or more desired demonstration songs. Can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of an electronic musical instrument according to the present invention.

FIG. 2 is a diagram showing an example of a configuration of an operation panel according to an embodiment of the present invention.

FIG. 3 is a diagram showing a state transition according to the embodiment of the present invention.

FIG. 4 is a flowchart (main routine) showing the operation of the embodiment of the present invention.

FIG. 5 is a flowchart (panel processing routine) showing the operation of the embodiment of the present invention.

FIG. 6 is a flowchart showing a demo switch pressing process in FIG.

FIG. 7 is a flowchart showing demo switch separation processing in FIG.

FIG. 8 is a flowchart (keyboard processing routine) showing the operation of the embodiment of the present invention.

FIG. 9 is a flowchart (5 second progress confirmation processing routine) showing an operation of the embodiment of the present invention.

FIG. 10 is a flowchart showing an all-music performance process in FIGS. 6 and 9;

FIG. 11 is a flowchart (automatic performance processing routine) showing the operation of the embodiment of the present invention.

FIG. 12 is a flowchart showing a performance start process in FIG.

FIG. 13 is a flowchart showing a music ending process in FIG.

FIG. 14 is a flowchart (timer interrupt processing routine) showing the operation of the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 keyboard device (switch means) 11 operation panel 12 CPU (judgment means, control means, automatic performance means) 13 timer 14 ROM 15 RAM 16 musical sound generator 17 D / A converter 18 amplifier 19 speaker 30 volume 31 demo switch (instruction) means)

Claims (2)

(57) [Claims] 1. Demo music selecting means provided corresponding to a plurality of demo music pieces; demo performance instructing means having a demo switch for instructing a demo performance instead of a normal keyboard performance; Demo song determining means for determining the demo song, and automatic performance means for automatically performing the demo song determined by the demo song determining means. When a demo song is selected by the demo song selecting means, only the selected demo song is played, and while the demo switch of the demonstration performance instructing device is turned on, the demo song is not selected by the demo song selecting device. An electronic musical instrument, wherein a predetermined demo song is selected and played if not performed. 2. The electronic musical instrument according to claim 1, wherein the demo music selecting means is constituted by a plurality of keys specified on a keyboard device.