JP2009223256A - Music player and performance processing program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily release a duet function with quite common operations even if a person who tries to release the duet function does not have knowledge about operations of a musical instrument. <P>SOLUTION: When shifting to a duet mode, a keyboard 1 is functionally split into a high key area and a low key area at a split point position. When a key is depressed a prescribed number of times within a prescribed time in areas A1 and A2 respectively having one octave band upward and downward around the split point position of the keyboard 1, it can be shifted to a normal mode from the duet mode without operating a duet switch 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a performance device and a program for performance processing.

Conventionally, a musical instrument has been proposed which has a repetitive function that allows different performers to play a low key range and a high key range of a single keyboard, a so-called duet function as a mode different from the normal mode.
In an instrument having a duet function, octave conversion is separately performed for each key range so that each performer can perform in the same range.
For example, in Patent Document 1, the keyboard is functionally divided into a low key range and a high key range with the key number SP as the split point position, and in the low key range, the pitch of the musical tone designated by the key press is higher than usual. A configuration is disclosed in which the octave is increased by two octaves and the octave is decreased by two octaves in the high key range.

Further, in Patent Document 2, by determining the key range to which the key corresponding to the key information generated by the key press belongs, and changing the desired octave amount of the key information generated in this key range based on the determination result, There is disclosed a configuration in which a portion in which pitches of musical sounds generated in at least two key ranges overlap is generated.
Further, in Patent Document 3, when the keyboard is divided into two key ranges, the original octave value of the key located in the center of the first key range and the reference tone range of the tone set in the first key range are described. A configuration is disclosed in which a reference tone range for each timbre is arranged approximately at the center of each key range by calculating an octave shift amount based on the octave value.
Japanese Patent No. 3586754 Japanese Examined Patent Publication No. 62-35118 JP 2000-194369 A

Normally, musical instruments are displayed for demonstration purposes in over-the-counter sales of musical instruments. In order to promote the fact that it has such a duet function, it is very important to let the user play the musical instrument and match the feeling of use.
However, when this duet function is activated, the pitch of the musical sound that is generated every time the key range is changed differs from the normal state. In such cases, users who are familiar with the instrument's operation and duet function can easily cancel the duet function, but there are an unspecified number of users who visit the store, and all users can operate it. There is no guarantee that you are familiar with it.

In particular, electronic musical instruments in recent years have become more and more multifunctional, resulting in more complicated operations and an increase in the number of switches, and it is becoming increasingly difficult to simply cancel the duet function. . If the user is a completely new electronic musical instrument beginner, not only will he be confused by the duet function canceling operation, but he may be misled that he is exhibiting a malfunctioning musical instrument.
The present invention has been made in view of such circumstances, and enables a person who wants to cancel a duet function to easily cancel the duet function by an ordinary operation even if he / she is not familiar with the operation of the musical instrument. The purpose is to.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a keyboard having a plurality of keys to which key numbers for designating the pitches of musical sounds to be pronounced are sequentially assigned, and a duet from a normal mode from the outside. Mode switching means for switching to a mode, and when any key on the keyboard is pressed and a key number is specified, and when the normal mode is specified, the musical tone connected to the specified key number When the duet mode is designated by the mode switching means, the designated key number corresponding to the octave set in advance corresponding to the key range to which the depressed key belongs is output. Octave changing means for outputting to the musical sound generating means, and when the duet mode is designated, the keyboard range of the keyboard within a predetermined time When a predetermined number of times or more key pressing is detected by the people, and having a a mode return means for returning to said normal mode said duet mode.

  Further, in the invention according to claim 2, which is dependent on claim 1, the keyboard is divided into a low key range and a high key range with a predetermined key position as a split point position, and the mode return means is provided for each of the two key ranges. And detecting a key depression more than a predetermined number of times.

  Further, in the invention according to claim 3, which is dependent on claim 1, the mode return means detects key depression performed in an area including at least a part of both key ranges centered on the split point position. It is characterized by performing.

  Further, according to the present invention, a keyboard having a plurality of keys to which key numbers for designating musical tones to be pronounced are sequentially assigned, and mode switching for switching from normal mode to duet mode from the outside. And when a normal number is designated when a key of the keyboard is pressed and a key number is designated to a computer applied to a performance apparatus having the means, the designated key is designated. The number is output to the connected musical sound generating means as it is, and when the duet mode is designated by the mode switching means, the number of octaves set in advance corresponding to the key range to which the pressed key belongs, When the designated key number is changed and the octave changing step is output to the musical sound generating means, and the duet mode is designated , If the key range each with depressed more than a predetermined number of the keyboard is detected within a predetermined time, characterized in that to execute a mode return step for returning to the normal mode the duet mode.

  Even if you are not familiar with the operation of the instrument, you can easily cancel the duet function with the most obvious operation, which is often done in normal mode performances.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 is an external view of an electronic keyboard instrument to which the present invention is applied.
The instrument body has a keyboard 1 having 88 keys and a duet switch 2 for switching between a normal mode and a duet mode.

In the normal mode, MIDI NOTE numbers 21 to 108 are assigned to the keys of the keyboard 1, and the pitches A0 to C8 are designated.
On the other hand, in the duet mode, 39 notes included in the lower key range than the position of the split point are assigned MIDI NOTE numbers 45 to 83, and are configured to designate pitches from A2 to B5, respectively. Also, MIDI NOTE numbers 36 to 84 are assigned to 49 keys included in the high key range from the position of the split point, and are configured to designate pitches from C2 to C6, respectively.

FIG. 2 is a block diagram showing the configuration of the electronic keyboard instrument according to this embodiment.
The CPU 10 processes the entire operation of the electronic keyboard instrument, and the program ROM 11 stores a program for controlling the processing of the CPU 10. The work RAM 12 is for temporarily storing data during processing by the CPU 10. When the note-on / note-off event generated by the CPU 10 based on the key press / release of any key of the keyboard 1 is supplied, the tone generator 13 receives a musical signal having a pitch based on these events. Generate.
The CPU 10, the program ROM 11, the work RAM 12, the tone generator 13, the keyboard 1 and the switch unit 2 such as a duet switch are connected via a bus line 14.

  By having such a configuration, the CPU 10 determines whether the mode is the normal mode or the duet mode corresponding to the operation of the duet switch 2, and specifies the key range of the keyboard 1 when switching from the normal mode to the duet mode. Is divided at the split point position, for example, the key number 60 (pitch is C4) in the normal mode, and the low key range increases the pitch assigned to each key by two octaves, and the high key range has two octaves. Process to bring down.

  A predetermined number or more within the range of one octave (indicated by A1 in FIG. 1) and one octave (indicated by A2 in FIG. 1) on the low key range centering on the key corresponding to the split point position. When the key is depressed, it is possible to change from the duet mode to the normal mode without having to operate the duet switch 2.

FIG. 3 is a flowchart showing the entire processing operation of the CPU 10.
When a power supply (not shown) is turned on, an initialization process (step A0) for initializing the internal registers of the CPU 10 and the work RAM 12 is executed. Next, switch processing (step A1) corresponding to the switch operated from the outside, keyboard processing corresponding to key depression / key release corresponding to keyboard 1 (step A2), and other processing (step A3) are executed in this order. The Among these, steps A1 to A3 are repeatedly executed until the power is turned off.

FIG. 4 shows a detailed flowchart of the switch process (step A1 in FIG. 3).
First, it is determined whether or not the duet switch 2 is turned on by an external operation (step B1). If the duet switch 2 is not on, the other switch processing (step B7) is performed and the processing is terminated.

  If the duet switch 2 is on, it is determined whether or not the duet flag DF for determining whether or not the duet mode is set to "0" (step B2). When the duet flag DF is “0”, that is, in the normal mode, the flag DF is set to “1”, that is, the duet mode (step B3). Then, a register DK for counting the number of key presses in a predetermined low key range and a register UK for counting the number of key presses in a predetermined high key range are set to “0”.

In step B2, if the duet flag DF is "1", that is, the duet mode, the flag DF is set to "0", that is, the normal mode (step B5). Then, the timer interrupt is prohibited (step B6).
After the process of step B4 or B6, other switch processes are performed (step B7), and this process is terminated.

5 to 7 show detailed flowcharts of the keyboard processing (step A2 in FIG. 3).
First, the keyboard 1 is scanned (step C1). By this scanning, it is determined whether or not the state of any of the keys has changed (step C2). If it is determined that there is no change, the process ends. .

  On the other hand, when the key state change is changed from OFF to ON (key pressing), the key number of the detected key is stored in the register N (step C3). Subsequently, it is determined whether or not the duet flag DF is "0", that is, the normal mode (step C4). If it is in the normal mode, the process proceeds to step C5, and a note-on command based on the key number stored in the register N is created.

  If it is determined in step C2 that the key has changed from on to off (key release), the process proceeds to step C6, and the key number of the key whose change has been detected is stored in the register N. Then, it is determined whether or not the duet flag DF is “0”, that is, the normal mode (step C7). If it is in the normal mode, the process proceeds to step C8, and a note-off command based on the key number stored in the register N is created.

  The note-on command and note-off command generated in step C5 or C8 are sent to the sound source 13 (step C9), and the sound source 13 generates or stops generation of the musical sound based on these commands.

When the flag DF is “1” in step C4, that is, in the duet mode, the process proceeds to step C10 in FIG. 6 to determine whether or not the values stored in the registers DK and UK are both “0”. If the values of the registers DK and UK are both “0”, it means that there is no key depression in a pre-designated key range. If the values are both “0”, the process proceeds to step C11 to set the value of the timer T to “0”, cancel the timer interrupt, and start the timer T count (step C12).
After the process of step C12, or when at least one of the values of the registers DK and UK is not “0” in step C10, the process proceeds to step C13.

In this step C13, it is determined whether or not the key number of the depressed key stored in the register N is “60” (split point position) or more. If it is determined that the value of the register N is “60” or more, it is determined whether or not the value of the register N is less than “72” (step C14). If it is determined that the value is “60” or more and less than “72”, it means that the key is pressed in the key range A1 shown in FIG. Thereafter, the value of the register UK is incremented (step C15), and the process proceeds to step C16.
If it is determined in step C14 that the value of the register N is “72” or more, the process of C15 is skipped and the process proceeds to step C16. In Step C16, “24” is subtracted from the value of the register N.

On the other hand, if it is determined in step C13 that the value of the register N is less than “60”, it is determined whether or not the value of the register N is “48” or more (step C17). Here, when it is determined that the number is “48” or more and less than “60”, it means that the key is pressed in the key range A2 shown in FIG. Thereafter, the value of the register DK is incremented (step C18), and the process proceeds to step C19.
If it is determined in step C17 that the value of the register N is less than “48”, the process of C18 is skipped and the process proceeds to step C19. In step C19, “24” is added to the value of the register N.

  A note-on command is created based on the key number in the register N changed in step C19 or C16 (step C20) and sent to the sound source 13 (step C21). As a result, the sound source 13 generates a musical sound signal.

  On the other hand, if the flag DF is “1” in step C7 in FIG. 5, that is, in the duet mode, the process proceeds to step C22 in FIG. 7 and the key number of the pressed key stored in the register N is “60”. It is determined whether or not it is (split point position) or more. Here, when it is determined that the value of the register N is “60” or more, “24” is subtracted from the value of the register N (step C23). Conversely, if it is determined that the value is less than “60”, “24” is added to the value of the register N (step C24).

  In the subsequent step C25, a note-off command based on the value of the register N added or subtracted in step C23 or C24 is created and sent to the sound source 13 (step C26). As a result, the sound source 13 stops generating the generated musical sound signal.

FIG. 8 is a flowchart of an interrupt processing routine that starts at a fixed timing.
First, the value of the timer T is incremented (step D1). Subsequently, it is determined whether the value of the timer T is within a predetermined time (step D2). If it is determined that the time is within the predetermined time, it is determined in subsequent steps D3 and D4 whether or not the values of the registers UK and DK are equal to or larger than the predetermined value α. That is, it is determined whether or not the key is pressed a predetermined number of times or more in each of the key ranges A1 and A2 within a predetermined time. If it is determined that the key has been depressed a predetermined number of times or more, the duet flag DF is set to “0”, that is, the duet mode is returned to the normal mode (step D5), and the timer interrupt is prohibited (step D6). Exit.

If the key press is less than the predetermined number of times α in at least one of the key presses A1 and A2 within the predetermined time, the process of steps D5 and D6 is skipped and the process is terminated.
On the other hand, when the value of the timer T exceeds the predetermined time in step D2, the process proceeds to step D7, the values of the registers UK and DK are cleared, and the process proceeds to step D6.

  As described above, in this embodiment, when a key press is detected in one of the key ranges A1 and A2, the key presses of both the key ranges A1 and A2 are pressed a predetermined number of times α or more within a predetermined time from that point. If there is a key, it is possible to shift to the normal mode without operating the duet switch 2.

  In other words, in the case of a duet performance, since each key range is played separately, it is often performed in a separate area on the keyboard. Moreover, in the area close to the split point position that divides the key range, playing in both key ranges in a very short time means that the two key ranges are being played, Such a performance is not performed as a duet performance.

On the other hand, in normal performance, performing across such a key range is always performed. Therefore, in this embodiment, when it is detected that the normal performance is performed, the mode is changed from the duet mode to the normal mode.
By adopting such a configuration, it is possible to easily shift from the duet mode to the normal mode if an ordinary performance such as that performed in the normal mode is performed without operating the duet switch 2.

In this embodiment, the number of key presses in the range of one octave on both sides of the split point position is detected. However, this range is not limited to one octave, and may be a half octave, or conversely, exceeds one octave. It is good also as a range.
In the present embodiment, when the key depression in the key ranges A1 and A2 is detected, the determination reference value of the predetermined time and the predetermined number of times α is used. However, the determination reference value may be a fixed value. However, it may be set arbitrarily.

1 is an external view of an electronic keyboard instrument to which the present invention is applied. It is a block diagram which shows the structure of the electronic keyboard instrument of FIG. It is the flowchart which showed the whole process of CPU10. It is a detailed flowchart of SW processing (step A1) of FIG. It is a detailed flowchart (part) of the keyboard process (step A2) of FIG. FIG. 4 is a detailed flowchart of a keyboard process (step A2) in FIG. 3 (continued). FIG. 4 is a detailed flowchart of a keyboard process (step A2) in FIG. 3 (continued). It is a flowchart of an interrupt processing routine that starts at a fixed timing.

Explanation of symbols

1 keyboard 2 duet switch 10 CPU
11 Program ROM
12 Work RAM
13 Sound source

Claims (4)

A keyboard having a plurality of keys sequentially assigned with key numbers for designating the pitches of musical notes to be pronounced,
Mode switching means for switching from normal mode to duet mode from the outside,
When any key of the keyboard is pressed and a key number is designated, when the normal mode is designated, the designated key number is output as it is to the connected musical sound generating means, and When the duet mode is designated by the mode switching means, the musical tone generation is performed by changing the designated key number by a preset octave corresponding to the key range to which the depressed key belongs. Octave changing means for outputting to the means;
Mode return means for returning the duet mode to the normal mode when a predetermined number of key presses are detected in each key range of the keyboard within a predetermined time when the duet mode is specified;
A performance device having   The keyboard is divided into a low key range and a high key range with a predetermined key position as a split point position, and the mode return means detects a key depression of a predetermined number of times or more in each of the two key ranges. The performance device according to 1.   2. The performance control device according to claim 1, wherein the mode return means detects a key depression performed in an area including at least a part of both key ranges centered on the split point position. The present invention is applied to a performance device having a keyboard having a plurality of keys assigned sequentially with key numbers for designating the pitches of musical sounds to be pronounced, and mode switching means for switching from the normal mode to the duet mode from the outside. On the computer,
When any key on the keyboard is pressed and a key number is specified, when the normal mode is specified, the specified key number is output as it is to the connected musical sound generating means, and When the duet mode is designated by the mode switching means, the musical tone generation is performed by changing the designated key number by a predetermined octave corresponding to the key range to which the depressed key belongs. Octave changing step to output to the means;
A mode return step for returning the duet mode to the normal mode when a predetermined number of key presses are detected in each key range of the keyboard within a predetermined time when the duet mode is specified;
A performance processing program that executes

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