JP2010190942A - Electronic musical instrument and program for the electronic musical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a player play outline of a melody by guiding only the outline of the melody. <P>SOLUTION: A CPU 21 determines whether or not the note indicated by note data corresponds to a grace note with reference to the note data stored in a music piece data area of a ROM 22, and stores the note data determined not to correspond to the grace note into a guide data area of a RAM 23 as guide data. Also, the CPU 21 reads out the note data stored in the guide data area, and makes an LED arranged in a key of a keyboard 11 emit light based on the read out note data so as to notify a player of the key to be depressed, in guide performance. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an electronic musical instrument capable of guiding a melody and an electronic musical instrument program.

  In an electronic musical instrument, LEDs are placed near the key (usually near the end of the key on the opposite side of the performer) or inside the key, and the key to be pressed by the performer is determined according to the musical notes. Techniques for turning on LEDs to show are known for some time. Such a function is called a “guide”, and is used, for example, by a performer who does not have a high performance level to practice playing a melody or accompaniment.

  In such a guide function, the LED of the key corresponding to the pitch of the note at which the pronunciation start time arrives is turned on based on the pronunciation time (pronunciation start time) and pronunciation time of the note data stored in the memory. Thereafter, when the sound generation time of the note has elapsed, the LED is turned off. The performer can advance the performance of the music piece by pressing the key whose LED is lit.

  For example, Patent Document 1 discloses that a predetermined sound (for example, only a root sound, a triad, etc.) is selected from chord constituent sounds according to a set level so that a chord playing method can be acquired stepwise in the guide function. For example, a technique for lighting an LED has been proposed.

JP 2007-156308 A JP 2002-175072 A

  As proposed in Patent Document 1, for accompaniment parts, the accompaniment performance guide according to the performance level can be realized by increasing the chord constituent sounds as the performance level increases. On the other hand, the melody sound basically has a problem that it is not easy to omit the sound according to the performance level. Therefore, the melody sound has to be played in accordance with the score including fine notes, especially decoration sounds. For beginners, it is not easy to play fine notes according to the score. For example, Patent Literature 2 proposes a technique that allows a predetermined range of mistouch. Thus, by giving a predetermined range of mistouch, it is not necessary to play the above-mentioned fine notes according to the score, so that priority is given to advancing performance or a lesson. However, it is desirable that there should be no mistouch, and even if the decoration sound is omitted in the music, the outline of the music does not change, and for example, the atmosphere of the music is not impaired.

  Accordingly, an object of the present invention is to provide an electronic musical instrument and a program for an electronic musical instrument that allow a player to play the outline of the melody by guiding only the outline of the melody without guiding the decorative sound.

An object of the present invention is to provide a note data storage means for storing note data including a time of sound generation and information indicating a pitch or a rest for each of notes constituting a predetermined musical piece,
Musical tone data generating means for generating musical tone data of a predetermined pitch based on the operation of the performance operator;
An electronic musical instrument comprising a plurality of light emitting elements arranged in the vicinity of each of the performance operators and instructing the operation of the performance operators,
With reference to the note data stored in the note data storage means, it is determined whether or not the note indicated by the note data corresponds to a decoration sound, and the note data determined not to be a decoration sound is determined as guide data. As guide data generation means for storing in the guide data storage means,
The electronic musical instrument comprises: a light emission control means for reading the note data stored in the guide data storage means and causing the light emitting element of the performance operator to emit light based on the note data.

In a preferred embodiment, the note data includes a pronunciation time for each of the notes,
The light emission control means turns on the light emitting element at the sounding time and continuously emits light only at the sounding time.

In a preferred embodiment, the guide data generating means
(1) The following note is not a rest,
(2) There are no notes to be pronounced simultaneously,
(3) The sound length is below a predetermined value, and
(4) When the note is not a rest, it is determined that the note corresponds to a decorative sound.

In another preferred embodiment, the guide data generating means includes
(1) the following note is not a rest (2) there are no notes to be played simultaneously (4) the note is not a rest, and
(5) When the note length is shorter than the note length of a predetermined number of notes before and after the note, it is determined that the note corresponds to a decoration sound.

Further, an object of the present invention is to provide note data storage means for storing note data including a sounding time and information indicating a pitch or a rest for each of notes constituting a predetermined music piece. In a computer provided with a plurality of light emitting elements arranged in the vicinity of each of the operators and instructing the operation of the operator,
A musical sound data generating step for generating musical sound data of a predetermined pitch based on the operation of the operator;
With reference to the note data stored in the note data storage means, it is determined whether or not the note indicated by the note data corresponds to a decoration sound, and the note data determined not to be a decoration sound is determined as guide data. As a guide data generation step to be stored in the guide data storage means,
The electronic musical instrument program is characterized in that the musical note data stored in the guide data storage means is read out and a light emission control step of causing the light emitting element of the operation element to emit light based on the musical note data is executed.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the electronic musical instrument and the program of an electronic musical instrument which make a player perform a large frame of a melody by guiding only the large frame of a melody, without guiding a decoration sound.

FIG. 1 is a diagram showing an external appearance of an electronic musical instrument according to the present embodiment. FIG. 2 is a block diagram showing the configuration of the electronic musical instrument according to the embodiment of the present invention. FIG. 3 is a flowchart showing an outline of the main flow of the electronic musical instrument according to the present embodiment. FIG. 4 is a diagram illustrating an example of timer interrupt processing according to the present embodiment. FIG. 5 is a flowchart illustrating an example of the switch processing according to the present embodiment. FIG. 6 is a flowchart showing an example of guide data creation processing according to the present embodiment. FIG. 7 is a diagram for explaining song data and guide data according to the present embodiment. FIG. 8 is a flowchart showing an example of the guide processing according to the present embodiment. FIG. 9 is a flowchart showing an example of keyboard processing according to the present embodiment. FIG. 10 is a flowchart illustrating an example of the sound generation process according to the present embodiment.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a diagram showing an external appearance of an electronic musical instrument according to the present embodiment. As shown in FIG. 1, an electronic musical instrument 10 according to the present embodiment has a keyboard 11 including 61 keys (C2 to C7). Also, on the upper part of the keyboard 11, a switch (for example, reference numeral 17) for designating a timbre, creation of guide data, the presence / absence of a guide, and various information relating to the music to be played, such as a timbre It has a liquid crystal display device 14 for displaying rhythm patterns, code names, and the like.

  FIG. 2 is a block diagram showing the configuration of the electronic musical instrument according to the embodiment of the present invention. As shown in FIG. 2, the electronic musical instrument 10 according to the present embodiment includes a CPU 21, a ROM 22, a RAM 23, a sound system 24, a keyboard 11, a switch group 12, and a display unit 13.

  The display unit 13 includes a liquid crystal display device 14 and an LED group 15. The LEDs constituting the LED group 15 are arranged inside the keyboard of the keyboard 11 (for example, reference numerals 16-1 and 16-2 in FIG. 1).

  The CPU 21 controls the entire electronic musical instrument 10, presses keys of the keyboard 11 (for example, reference numerals 16-1 and 16-2 in FIG. 1) and switches that constitute the input unit 12 (for example, reference numeral 17 in FIG. 1). Various processes such as detection of the operation, control of the sound system 24 according to the operation of the key and switch, and lighting of the LED according to the guide data are executed.

  The ROM 22 performs various processes to be executed by the CPU 21, for example, on / off (key release) of keys on the keyboard, switch operation, tone generation according to the key press, and LED lighting according to the guide data. Store programs such as. The ROM 22 has a waveform data area for storing waveform data for generating musical sounds such as piano, guitar, bass drum, snare drum, and cymbal, and a song data area for storing note data of notes constituting the music. Have. The RAM 23 stores a program read from the ROM 22 and data generated in the course of processing. As will be described later, in the present embodiment, guide data indicating the key to be pressed next to the performer is generated based on the note data stored in the song data area. The generated guide data is stored in the RAM 23.

  The sound system 24 includes a sound source unit 26, an audio circuit 27, and a speaker 28. For example, when receiving a note-on event related to the depressed key from the CPU 21, the tone generator 26 reads predetermined waveform data from the waveform data area of the ROM 22, generates musical tone data of a predetermined pitch, and outputs it. The sound source unit 26 can also output waveform data, particularly waveform data of percussion instrument sounds such as a snare drum, bass drum, and cymbal, as musical sound data. The audio circuit 27 D / A converts and amplifies the musical sound data. Thereby, an acoustic signal is output from the speaker 28.

  The electronic musical instrument 10 according to the present embodiment can generate a musical tone based on the key depression of the keyboard 11 under the normal mode. On the other hand, the electronic musical instrument 10 enters a guide mode when a guide switch (not shown) is operated. Under the guide mode, the LED of a predetermined key is turned on according to the guide data, and the player can indicate the key to be pressed next.

  FIG. 3 is a flowchart showing an outline of the main flow of the electronic musical instrument according to the present embodiment. FIG. 4 is a diagram illustrating an example of timer interrupt processing according to the present embodiment. When the power is turned on, the main flow is activated and each process described later is repeatedly executed. The timer interrupt process is executed as an interrupt process at a predetermined time interval when the main flow is being executed, and the timer is incremented.

  As shown in FIG. 3, when the electronic musical instrument 10 is turned on, the CPU 21 of the electronic musical instrument 10 performs initial processing including clearing of data in the RAM 23 and clearing of the image of the liquid crystal display device 14 and clearing of the LED group 15. (Initialization processing) is executed (step 301). When the initial process (step 301) ends, the CPU 21 detects each operation of the switches constituting the input unit 12, and executes a switch process that executes a process according to the detected operation (step 302). FIG. 5 is a flowchart illustrating an example of the switch processing according to the present embodiment.

  As shown in FIG. 5, in the switch process, the CPU 21 determines whether the guide data creation switch is turned on (step 501). When it is determined Yes in step 501, guide data creation processing is executed (step 502). The guide data creation process will be described in detail later. The CPU 21 determines whether the guide switch is turned on (step 503). If it is determined Yes in step 503, the CPU 21 inverts the guide flag in the RAM 23 (step 504). The CPU 21 resets it to “0” if the guide flag in the RAM 23 is “1”, and sets it to “1” if the guide flag is “0”. In the present embodiment, the guide switch (not shown) is a single switch. When the guide switch is first turned on, the operation mode becomes the guide mode, and the guide is turned on. In the guide mode, the guide is turned off by turning on the guide switch.

  Next, the CPU 21 determines whether or not the guide flag is “1” (step 505). If it is determined Yes in step 505, the CPU 21 starts a built-in timer (step 506). On the other hand, when it is determined No in step 505, the CPU 21 stops the guide (step 507) and stops the timer (step 508).

  Thereafter, the CPU 21 executes another switch process (step 509). In another switch process (step 509), the operation of various switches such as a tone color designation switch is detected, and the process corresponding to the switch operation is executed.

  The timer started in step 506 and stopped in step 508 is incremented in the timer interrupt process. As shown in FIG. 4, when the timer interrupt process is started, the CPU 21 determines whether the guide flag is “1” (step 401). If it is determined No in step 401, the process is terminated. If it is determined Yes in step 401, the CPU 21 increments the timer and initializes a parameter n indicating a keyboard number (key number) to “0”. The key number n is “0” for the lowest note and increases by “1” as the pitch of the key increases.

  The CPU 21 determines whether or not the remaining light emission time On [n] indicating the light emission time of the LED in the key indicated by the key number n is “0” (step 404). If the remaining light emission time On [n] is not “0” (No in step 404), the CPU 21 decrements the remaining light emission time On [n] (step 405). When it is determined Yes in step 404 or after step 405 is executed, the CPU 21 increments the parameter n indicating the key number (step 406) and determines whether the parameter n exceeds the total number of keys. (Step 407). If NO is determined in step 407, the process returns to step 404. On the other hand, if it is determined Yes in step 407, the process is terminated. As described above, in the timer interrupt process, when in the guide mode, the timer is incremented and a process of subtracting the remaining light emission time is executed for the key that is emitting the corresponding LED.

  Next, the guide data creation process in step 502 of FIG. 5 will be described in more detail. FIG. 6 is a flowchart showing an example of guide data creation processing according to the present embodiment. As shown in FIG. 6, the CPU 21 reads note data from the song data area of the ROM 22 (step 601).

  FIG. 7 is a diagram for explaining song data and guide data according to the present embodiment. In FIG. 7, the song data area 700 is provided in the ROM 22, and the guide data area 701 is provided in the RAM 23. The song data area includes note data for each note constituting the song (see, for example, reference numerals 710 and 711). Note data (for example, note data (0)) has a sounding time (see reference numeral 721), pitch information or rest information (see reference numeral 722), and a sounding time (see reference numeral 723), respectively. The pitch information corresponds to a note number of MIDI (Musical Instrument Digital Interface). A predetermined value not included in the note number is assigned as rest information.

  In the guide data area, data selected from the note data by the guide data creation process described below is stored as guide data. Therefore, the structure of the guide data stored in the guide data area is the same as that of the note data. The guide data area includes a plurality of note data, but the number of note data is equal to or less than the number of note data in the music data area. In the following, since the structure of the guide data is the same as that of the note data, the data stored in the guide data area is also referred to as note data.

  The CPU 21 determines whether or not the subsequent note (for example, note data (i + 1)) is a rest for the note data (for example, note data (i)) to be processed (step 602). Whether or not a note corresponds to a rest can be realized by referring to the section of pitch information or rest information in the note data. If it is determined Yes in step 602, the CPU 21 stores the note data (note data (i)) as guide data in the guide data area of the RAM 23 (step 606).

  When it is determined No in step 602, the CPU 21 determines whether or not there is a note that should be sounded simultaneously with the note indicated by the note data to be processed (step 603). The CPU 21 checks whether there is other note data having the same pronunciation time as the note data (note data (i)) to be processed in the music data area. If it is determined Yes in step 603, the CPU 21 stores the note data (note data (i)) as guide data in the guide data area of the RAM 23 (step 606). On the other hand, if it is determined No in step 603, the CPU 21 determines whether the note length indicated by the note data to be processed is greater than a predetermined value (step 604).

  The sound length corresponds to the sound generation time of the note data. In step 604 according to the present embodiment, for example, it is determined whether the sound length is greater than a 64th note. If it is determined Yes in step 604, the CPU 21 stores the note data (note data (i)) in the guide data area of the RAM 23 (step 606). On the other hand, when it is determined No in step 604, the CPU 21 determines whether or not the note indicated by the note data to be processed is a rest (step 605). When it is determined Yes in step 605, the CPU 21 stores the note data (note data (i)) as guide data in the guide data area of the RAM 23 (step 606).

  When it is determined No in step 605 or after step 606 is completed, the CPU 21 determines whether or not there is note data for the next note in the song data area (step 607). If YES is determined in step 607, the process returns to step 601. On the other hand, if No is determined in step 607, the process is terminated.

In the guide data creation processing according to the present embodiment, note data composed of notes from which the decoration sound is removed is excluded from the notes indicated by the note data in the music data area, excluding the notes considered to be decoration sounds. Data is stored in the guide data area. Here, the notes considered as decoration sounds are as follows.
(1) The following note is not a rest.
(2) There are no notes that should be sounded simultaneously (not a chord component).
(3) The sound length is below a predetermined value.
(4) The note is not a rest.

  That is, it is determined that a decoration sound is established when all of the above (1) to (4) are established.

  In this way, the musical notes are composed of those from which the decorative sound is removed, and only the musical notes are guided by emitting the LEDs arranged on the corresponding keys, without impairing the atmosphere of the musical piece, Even beginners can guide musical notes that can be played.

  When the switch process (step 302 in FIG. 3) ends, the CPU 21 executes a guide process (step 303). FIG. 8 is a flowchart showing an example of the guide processing according to the present embodiment. As shown in FIG. 8, the CPU 21 determines whether the guide flag is “1” (step 801). If it is determined No in step 801, the process ends. If YES is determined in step 801, the CPU 21 reads the note data stored in the guide data area (step 802), and refers to the sounding time and timer value (timer time) of the read note data. Then, it is determined whether the timer time has reached the sounding time (step 803). If it is determined No in step 803, the CPU 21 reads the next note data from the guide data area (step 806), and determines whether reading of all the note data from the guide data area has been completed (step 806). 807). If NO is determined in step 807, the process returns to step 803.

  If it is determined Yes in step 803, the CPU 21 emits a key corresponding to the key number k indicated by the pitch information in the note data (note data (i)) to be processed. A signal is output to (step 804). Next, the CPU 21 sets the sound generation time of the note data for the remaining light emission time On [k] for the key number k (step 805). Thus, when the sounding time of the note indicated by the note data in the guide data area arrives, the LED of the key corresponding to the note is turned on, and the LED emits light for the time corresponding to the sounding time in the note data. To do.

  If it is determined Yes in step 807, the CPU 21 initializes the parameter n indicating the key number (step 808) and determines whether the remaining light emission time On [n] is “0” (step 809). ). Note that the remaining light emission time On [n] is decremented at a predetermined time interval in the timer interrupt process described above. If it is determined Yes in step 809, the CPU 21 outputs a signal to the LED group 15 so that the key corresponding to the key number n is turned off (step 810). When it is determined No in step 809 or after step 810 is executed, the CPU 21 increments the parameter n (step 811) and determines whether the parameter n has exceeded the total number of keys (step 812). ). If NO is determined in step 811, the process returns to step 809. On the other hand, if it is determined Yes in step 811, the process ends.

  When the guide process (step 303 in FIG. 3) ends, the CPU 21 executes a keyboard process (step 304). FIG. 9 is a flowchart showing an example of keyboard processing according to the present embodiment. As shown in FIG. 9, the CPU 21 scans the keys of the keyboard 11 in a predetermined order (for example, from a key with a low pitch) (step 901), and whether or not the state of the key to be processed has changed. Is determined (step 902). When the key is turned on in step 902, the CPU 21 generates a note-on event indicating that a musical tone having a pitch corresponding to the key is generated based on the key depression (step 903). If the key to be processed is turned off, the CPU 21 generates a note-off event indicating that the musical tone having the pitch corresponding to the released key is muted (step 904). The note-on event and note-off event are stored in the event area of the RAM 23.

  After steps 903 and 904 are executed, or when it is determined in step 902 that there is no change in the key state, the CPU 21 determines whether the processing has been completed for all keys (step 905). If NO is determined in step 905, the process returns to step 901. On the other hand, if it is determined YES in step 905, the process is terminated.

  After the keyboard process (step 304), a sound generation process is executed (step 305). FIG. 10 is a flowchart illustrating an example of the sound generation process according to the present embodiment. The CPU 21 refers to the event area of the RAM 23 (step 1001), and determines whether there is an unprocessed event (step 1002). If it is determined No in step 1002, the process ends. If it is determined Yes in step 1002, the CPU 21 determines whether the event is a note-on event (step 1003). If YES is determined in step 1003, the CPU 21 instructs the sound source unit 26 to generate a musical tone having a pitch indicated by the note-on event with a predetermined tone color (step 1004). In response to the instruction, the sound source unit 26 reads the waveform data of the specified tone color based on the specified pitch, and multiplies the read waveform data by the multiplication value based on the envelope. Musical sound data is generated and output to the audio circuit 27.

  If it is determined No in step 1003, that is, if the event is a note-off event, the CPU 21 instructs the sound source unit 26 to mute the musical tone having the pitch indicated by the note-off event. In response to the instruction, the sound source unit 26 multiplies the read waveform data by a gradually decreasing release envelope to generate musical sound data and outputs the musical sound data to the audio circuit 27.

  According to the present embodiment, the CPU 21 refers to the note data stored in the song data area, determines whether or not the note indicated by the note data corresponds to a decorative sound, and determines that it does not correspond to a decorative sound. The recorded note data is stored as guide data in the guide data area. The CPU 21 reads the note data stored in the guide data area, and causes the keyboard LED based on the note data to emit light. As a result, the key LED corresponding to the note is emitted only for the note that does not correspond to the decoration sound, and the player is prompted to press the key. Therefore, the musical note itself is simplified, and it is possible to perform without affecting the outline of the melody and without impairing the atmosphere of the music.

  Further, according to the present embodiment, the CPU 21 lights the LED at the sounding time according to the note data and continuously emits light only at the sounding time. By continuing the light emission of the LED according to the note length, it is possible to inform the performer of the length of the note.

Furthermore, according to the present embodiment, the CPU 21
(1) The following note is not a rest,
(2) There are no notes to be pronounced simultaneously,
(3) The sound length is below a predetermined value, and
(4) When the note is not a rest, it is determined that the note corresponds to a decorative sound. As a result, the decoration sound can be appropriately specified with relatively simple logic.

  The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

For example, in the above embodiment,
(1) The following note is not a rest.
(2) There are no notes that should be sounded simultaneously (not a chord component).
(3) The sound length is below a predetermined value.
(4) The note is not a rest.
When all the four conditions are satisfied, the note is determined as a decoration sound. However, it is not limited to this. For example,
(1) The following note is not a rest.
(2) There are no notes that should be sounded simultaneously (not a chord component).
(4) The note is not a rest.
(5) The sound length is shorter than the sound length of a predetermined number of notes before and after the note.
The note may be determined as a decoration sound when all of the four conditions are satisfied. Here, the sound length of the predetermined number of notes before and after is calculated by, for example, calculating the average value of the sound lengths of the predetermined number of notes and comparing the sound length of the notes to be determined with the calculated average value. good. Alternatively, a ratio of the note length of the note to be determined to the calculated average value is calculated, and when the ratio is equal to or less than a predetermined value (for example, 1/2 or less), the note is a decorative sound. You may judge.

  According to this example, it is possible to remove a note that is shorter than the note length before and after the note to be determined in the music piece as a decoration sound. Therefore, by omitting only the short-length notes that have a small effect on the outline of the phrase in the melody, it is possible to omit the notes without impairing the music atmosphere.

DESCRIPTION OF SYMBOLS 10 Electronic musical instrument 11 Keyboard 12 Input part 13 Display part 14 Liquid crystal display device 15 LED group 16 Key 21 CPU
22 ROM
23 RAM
24 Sound System 26 Sound Source 27 Audio Circuit 28 Speaker

Claims (5)

Note data storage means for storing note data including a sounding time and information indicating a pitch or a rest for each of the notes constituting a predetermined music piece;
Musical tone data generating means for generating musical tone data of a predetermined pitch based on the operation of the performance operator;
An electronic musical instrument comprising a plurality of light emitting elements arranged in the vicinity of each of the performance operators and instructing the operation of the performance operators,
With reference to the note data stored in the note data storage means, it is determined whether or not the note indicated by the note data corresponds to a decoration sound, and the note data determined not to be a decoration sound is determined as guide data. As guide data generation means for storing in the guide data storage means,
An electronic musical instrument comprising: light emission control means for reading out note data stored in the guide data storage means and causing a light emitting element of a performance operator based on the note data to emit light. The note data includes a pronunciation time for each of the notes;
2. The electronic musical instrument according to claim 1, wherein the light emission control unit lights the light emitting element at the sounding time and continuously emits light only at the sounding time. The guide data generation means includes
(1) The following note is not a rest,
(2) There are no notes to be pronounced simultaneously,
(3) The sound length is below a predetermined value, and
(4) The electronic musical instrument according to claim 1 or 2, wherein when the note is not a rest, it is determined that the note corresponds to a decorative sound. The guide data generating means
(1) the following note is not a rest (2) there are no notes to be played simultaneously (4) the note is not a rest, and
(5) The electronic device according to claim 1 or 2, wherein when the sound length is shorter than the sound length of a predetermined number of notes before and after the note, it is determined that the note corresponds to a decorative sound. Musical instrument. For each of the notes making up a predetermined musical piece, a note data storage means storing note data including the sound generation time and information indicating the pitch or rest, and in the vicinity of each of the operators In a computer provided with a plurality of light emitting elements arranged and instructing operation of the operation element,
A musical sound data generating step for generating musical sound data of a predetermined pitch based on the operation of the operator;
With reference to the note data stored in the note data storage means, it is determined whether or not the note indicated by the note data corresponds to a decoration sound, and the note data determined not to be a decoration sound is determined as guide data. As a guide data generation step to be stored in the guide data storage means,
A program for an electronic musical instrument, comprising: performing a light emission control step of reading note data stored in the guide data storage means and causing a light emitting element of an operator to emit light based on the note data.

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