JP2009223257A - Music player - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To show an effect as if respective players play separate musical instruments when shifting to a so-called duet mode. <P>SOLUTION: When a normal mode is designated by a CPU 10, a signal generated by mixing musical signals from sound sources 13a and 13b provided corresponding to key areas of a keyboard 1 with a mixer 14a is selected by selectors 14a and 14b and supplied to loudspeakers 3a and 3b so as to sound in a stereo system. When a duet mode is designated, the selector 14a and 14b select output from the respective sound sources 13a and 13b so as to supply it to the loudspeakers 3a and 3b. Thus, the loudspeaker 3a generates musical sound from the sound source 13a, and the loudspeaker 3b generates musical sound from the sound source 13b, so that it shows the effect as if the sound is generated from separate musical instruments. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a performance device.

2. Description of the Related Art Conventionally, musical instruments have been proposed as performance devices having a repetitive function that allows different performers to perform the low key range and high key range of a single keyboard, that is, a so-called duet function as a mode different from the normal mode.
In the musical instrument having the continuous 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 depression 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

In this way, when the duet mode is selected, a single keyboard is divided into multiple key ranges and different performers play, as if each performer is playing a separate keyboard instrument. It is preferable that an advantageous effect occurs.
However, in the conventional apparatus, even if the mode is switched to the duet mode, the musical sound generated by the performance is only supplied to the sound generation device such as a speaker provided in the apparatus main body in the same format, for example, the stereo format. In this case, I can only feel as if multiple players are playing a single instrument.
The present invention has been made in view of such circumstances, and in the so-called duet mode, it is possible to produce an effect as if each player is playing a separate instrument. Objective.

  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 normal mode and a duet from the outside. A mode designating unit for designating any one of the modes, a plurality of musical tone generating units provided corresponding to the key range of the keyboard, and generating and outputting a musical signal of a pitch based on the input key number; When any key on the keyboard is pressed and a key number is specified, when the normal mode is specified by the mode specifying means, the specified key number belongs to the specified key number. While outputting as it is to the musical tone generation means corresponding to the key range, and when the duet mode is designated, the octave portion set in advance corresponding to the key range to which the pressed key belongs, Octave changing means for changing the designated key number and outputting to the musical tone generating means corresponding to the key range to which the pressed key belongs, and musical tone signals respectively generated from the plurality of musical tone generating means. When the normal mode is designated by the mode designating means, a plurality of connected sounding means are output as stereo signals, and when the duet mode is designated, each of the plurality of sounding means is output as a monaural signal. Output control means for outputting.

  In the invention according to claim 2, which is dependent on claim 1, each of the plurality of sound generating means is provided corresponding to a key range of the keyboard, and the output control means is controlled by the mode specifying means. Is specified, the musical tone signal from the musical tone generating means provided for each key range is controlled to be supplied to the corresponding sounding means.

  Further, in the invention according to claim 3 that is dependent on claim 1, the output control means corresponds to each of the mixer that mixes the tone signals from the plurality of tone generation means and the plurality of tone generation means. A plurality of selectors provided to select one of the outputs from the musical tone generation means and the output from the mixer based on a selection signal supplied thereto and to supply the sound generation means; And a controller for supplying a selection signal to the selector.

  According to the above invention, in the normal mode, a plurality of sounding devices are output as stereo signals, and in the duet mode, each of the sounding means is output as a monaural signal. In this case, the musical sound produced by each performer is output from different sounding devices, and it is possible to produce an effect as if each performer is playing a different instrument.

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, a duet switch 2a for switching between the normal mode and the duet mode, and a volume switch 2b for controlling the sound volume (sound image localization). Furthermore, speakers 3a and 3b are provided at the left and right ends of the instrument body, respectively.

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 tone generators 13a and 13b are supplied with note-on / note-off events generated by the CPU 10 based on key press / release of any key of the keyboard 1, the musical tone having a pitch based on these events is supplied. Generate a signal. Here, the sound source 13a generates a musical sound corresponding to the key depression included in the lower key range from the split point position (the position corresponding to the key number “60” in the normal mode), and the sound source 13b is generated from the split position. It is assigned so as to generate a musical sound corresponding to the key depression included in the high key range.
The musical tone signals generated by the sound sources 13a and 13b are supplied to the output control unit 14.

  Based on the control from the CPU 10, the output control unit 14 outputs the tone signals from both the sound sources 13a and 13b in stereo using the speakers 3a and 3b in the normal mode, and from the sound source 13a in the duet mode. The musical tone signal is output from only the speaker 3a, and the musical tone signal from the sound source 13b is output only from the speaker 3b. The output control unit 14 also controls the volume of musical sounds generated from the speakers 3a and 3b.

  The CPU 10, the program ROM 11, the work RAM 12, the sound generators 13 a and 13 b, the output control unit 14, and the switch unit 2 including the keyboard 1 and the duet switch 2 a and the volume switch 2 b are connected via a bus line 15. .

FIG. 3 is a block diagram showing a detailed configuration of the output control unit 14.
The output signals of the sound sources 13a and 13b are input to the mixer 14a and to the selectors 14b and 14c, respectively. Further, the output signal of the mixer 14a is also input to both the selectors 14b and 14c.
The output of the selector 14b is supplied to the speaker 3a via the amplifier 14d, and the output of the selector 14c is supplied to the speaker 3b via the amplifier 14e.

  The controller 14f is controlled by the CPU 10 and outputs a selection signal SEL for selecting one of the signals input to the selectors 14b and 14c. Here, when SEL is “1”, the output signals from the sound sources 13a and 13b are selected, and when “SEL” is “0”, the output signal of the mixer 14a is selected. Further, the controller 14f outputs signals VOL1 and VOL2 that control the amplification degrees of the amplifiers 14d and 14e. In the duet mode, the signals VOL1 and VOL2 are set to the set values, and in the normal mode, the signal VOL1 is set to a set value, and the signal VOL2 is set to a difference value between the maximum value (settable maximum amplification factor) and the set value. The

  By having such a configuration, the CPU 10 determines whether the mode is the normal mode or the duet mode in response to the operation of the duet switch 2a, and when the mode is switched to the duet mode, the tone signal from the sound source 13a is only from the speaker 3a. The tone signal from the sound source 13b is output from only the speaker 3b, and in the normal mode, the tone signal from both the sound source 13a and 13b is output in stereo using both the speakers 3a and 3b.

FIG. 4 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. 5 shows a detailed flowchart of the switch process (step A1 in FIG. 3).
First, it is determined whether or not the duet switch 2a is turned on by an external operation (step B1). If the duet switch 2a is on, the duet flag DF for determining whether or not the duet mode is set is reversed (step B2). Then, it is determined whether or not the flag DF is “1” (step B3). Here, when the flag DF is “1”, that is, in the duet mode, the selection signal SEL is set to “1” (step B4). Conversely, when the flag DF is “0”, that is, in the normal mode, the selection signal SEL is set to “0” (step B5). After these processes, the process proceeds to step B6. However, if it is determined in step B1 that the duet switch 2a is not on, the process directly proceeds to step B6.

In step B6, it is determined whether or not the volume switch 2b has been operated. When the volume switch 2b is operated here, it is determined whether or not the flag DF is “1” (step B7). Here, when the flag DF is “1”, that is, in the duet mode, the values set by the operation of the volume switch 2b are set in the signals VOL1 and VOL2 (steps B8 and B9).
Conversely, when the flag DF is “0”, that is, in the normal mode, a set value is set for the signal VOL1, and a difference value between the maximum value and the set value (the value of VOL1) is set for the signal VOL2 (steps B10 and B11). . After the VOLs 1 and 2 are set, or when it is determined in step B6 that the volume switch 2b has not been operated, other switch processing (step B12) is executed, and this processing ends.

  By this processing, the output control unit 14 causes the selectors 14b and 14c to output the output signals from the sound sources 13a and 13b when the flag DF is “1”, that is, in the duet mode, the selection signal SEL is “1”. select. The amplifier 14d amplifies the signal of the selected sound source 13a based on the set value from the volume switch 2b and supplies the amplified signal to the speaker 3a. The amplifier 14e amplifies the signal of the sound source 13b based on the set value from the volume switch 2b and supplies the amplified signal to the speaker 3b. Thus, in the duet mode, the tone signal from the sound source 13a is output from only the speaker 3a, and the tone signal from the sound source 13b is output from only the speaker 3b.

When the flag DF is “0”, that is, in the normal mode, the selection signal SEL becomes “0”, so that the selectors 14b and 14c select the output signal from the mixer 14a. The amplifier 14d amplifies the signal of the mixer 14a based on the set value from the volume switch 2b and supplies the amplified signal to the speaker 3a, while the amplifier 14e supplies the maximum value that can be set by the volume switch 2b. And a set value from the volume switch 2b are amplified and supplied to the speaker 3b.
As a result, in the normal mode, the musical sound signals from both the sound sources 13a and 13b are output in stereo using both the speakers 3a and 3b.

6 and 7 show a detailed flowchart of the keyboard process (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 key number stored in the register N is equal to or greater than “60”, which is the key number of the key corresponding to the split point position (step C4). If it is determined that the value is “60” or more, it is determined whether or not the duet flag DF is “1”, that is, the duet mode (step C5). If it is determined that the mode is the duet mode, “24” is subtracted from the key number stored in the register N (step C6). Thereafter, a note-on command based on the key number stored in the register N is created (step C7) and sent to the sound source 13b (step C8).

  If it is determined in step C4 that it is less than “60”, it is determined whether or not the duet flag DF is “1”, that is, the duet mode (step C99). If it is determined that the mode is the duet mode, “24” is added to the key number stored in the register N (step C10). Thereafter, a note-on command based on the key number stored in the register N is created (step C11) and sent to the sound source 13a (step C12). The sound sources 13a and 13b generate music based on these sent note-on commands.

  If it is determined in step C2 that the key has been changed from on to off (key release), the process proceeds to step C13 in FIG. 7 and the key number of the detected key is stored in the register N. Subsequently, it is determined whether or not the key number stored in the register N is equal to or greater than “60”, which is the key number of the key corresponding to the split point position (step C14). If it is determined that the value is “60” or more, it is determined whether or not the duet flag DF is “1”, that is, the duet mode (step C15). If it is determined that the mode is the duet mode, “24” is subtracted from the key number stored in the register N (step C16). Thereafter, a note-off command based on the key number stored in the register N is created (step C17) and sent to the sound source 13b (step C18).

  If it is determined in step C14 that it is less than “60”, it is determined whether or not the duet flag DF is “1”, that is, the duet mode (step C19). If it is determined that the mode is the duet mode, “24” is added to the key number stored in the register N (step C20). Thereafter, a note-off command based on the key number stored in the register N is created (step C21) and sent to the sound source 13a (step C22). The sound sources 13a and 13b mute the musical tone based on these sent note-off commands.

  As described above, in the present embodiment, in the normal mode, the musical sound generated by the sound sources 13a and 13b is output in a stereo format using the speakers 3a and 3b, but in the duet mode, in the low key range. Musical sounds due to performance are output from the speaker 3a, and musical sounds due to performance in a high key range are output from the speaker 3b, so that the effect is as if each performer is playing a separate instrument.

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 a block diagram which shows the detailed structure of the output control part 14 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. FIG. 5 is a detailed flowchart (part) of the keyboard process (step A2) in FIG. FIG. 5 is a detailed flowchart of the keyboard process (step A2) in FIG. 4 (continued).

Explanation of symbols

1 Keyboard 2a Duet Switch 3a, 3b Speaker 10 CPU
11 Program ROM
12 Work RAM
13a, 13b Sound source 14 Output controller

Claims (3)

A keyboard having a plurality of keys sequentially assigned with key numbers for designating the pitches of musical notes to be pronounced,
Mode designation means for designating either normal mode or duet mode from the outside,
A plurality of musical tone generating means provided corresponding to the key range of the keyboard, and generating and outputting a musical tone signal having a pitch based on the input key number;
When any key on the keyboard is pressed and a key number is specified, when the normal mode is specified by the mode specifying means, the specified key number belongs to the specified key number. When the duet mode is designated, the musical tone generating means corresponding to the key range is output as it is, and the designated octave corresponding to the key range to which the depressed key belongs is specified. Octave changing means for changing the key number and outputting to the musical sound generating means corresponding to the key range to which the depressed key belongs;
When the normal mode is designated by the mode designating means, the tone signals generated from the plurality of music sound producing means are output as stereo signals to the connected sound producing means, and the duet mode is designated. Output control means for outputting to each of the plurality of sound generation means as a monaural signal,
A performance device having Each of the plurality of sounding means is provided corresponding to the key range of the keyboard,
The output control means controls so as to supply a tone signal from a tone generation means provided for each key range to a corresponding tone generation means when a duet mode is designated by the mode designation means. The performance device according to 1. The output control means includes
A mixer for mixing musical sound signals from the plurality of musical sound generating means;
Provided corresponding to each of the plurality of musical sound generating means, and selecting either one of the output from each musical sound generating means and the output from the mixer based on a supplied selection signal to generate the sound A plurality of selectors for supplying means;
A controller for supplying a selection signal to the plurality of selectors;
The performance device according to claim 1, comprising:

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