JP2695588B2 - Performance information changing device for automatic performance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variety of automatic performance devices such as an automatic performance piano, an electronic musical instrument, and a sequencer, which are used to automatically perform performances by, for example, changing normally recorded performance information into a BGM style. The present invention relates to an information changing device.

[0002]

2. Description of the Related Art Conventionally, an automatic performance piano has a function of controlling the volume during automatic performance. This volume control function changes the overall volume by increasing or decreasing the keystroke strength in the performance information input from a floppy disk or the like by a predetermined value, and is used as follows. It was

For example, normally recorded performance information is used as BGM.
In the case of changing to the wind and attempting to perform automatically, a predetermined value is subtracted from the keystroke strength data in the performance information, and the volume is changed to a lower volume as a whole to perform. Also, if you try to play a performance recorded on a grand piano on an upright piano, the sense of realism is inferior, so by adding a predetermined value to the keystroke strength data in the performance information, the overall volume is changed to a higher volume. It was done by playing.

[0004]

However, since the change to the BGM-like performance by the conventional apparatus is only to reduce the volume, when the music itself is not suitable for BGM, After all, there was a problem that I was distracted by the song and did not become BGM. Also, especially in the case of an automatic playing piano, even if the music itself is suitable for BGM, if the performance is lowered in a lounge or the like to a certain extent, almost no music can be heard at a position away from the piano. There was a problem of not becoming.

On the other hand, there is a problem that the increase in the volume for producing a realistic sensation is only annoying depending on the music or the like. Furthermore, in order to satisfy various tastes of users, not only volume change but also
There has been a growing demand for automatic performance in various modes in which the image of the original music has been changed, such as more dynamic performance, lighter performance, performance with dynamic parts and lighter parts.

Therefore, the present invention stores the given performance information.
By changing it, you can perform BGM-like automatic performance.
It is an object of the present invention to provide a performance information changing device that can be played. Ma
Also, by changing the given performance information
Performance that can perform dynamic automatic performance
Another object is to provide an information changing device.

[0007]

Means for Solving the Problems, Actions and Effects of the Invention A performance information changing device for an automatic performance device according to the present invention, which has been made to achieve the above object, has the following features.
At least the tone of the pitch, and the performance information input means for inputting performance information about the volume, and changes output means for changing the dynamic range of performance information that is the input, low
At least normal mode and BGM mode can be selected
Mode selecting means, the change output means is the mode
When the normal mode is selected by the selection means
The output volume is directly proportional to the input volume
Set the output volume to the input volume to increase,
The BGM mode is selected by the mode selection means.
If the output volume increases as the input volume increases
If the input volume is lower than the reference value,
The output volume is louder than in normal mode, and conversely the input sound
If the amount is larger than the reference value, the output volume is set to normal mode
Output volume relative to input volume so that it is smaller than
Is set .

The performance information changing device according to claim 1 is
In normal mode, the output volume is close to the input volume.
Power. On the other hand, in the BGM mode, the input volume
Is smaller than the reference value, the output volume is in normal mode
Output volume if larger than the reference value
Is smaller than in normal mode. That is, BGM
In mode, the dynamic range of performance information is narrowed and suppressed.
Use a mode with less frying. Moreover, the volume of the performance information
This is because the volume at the peak position of the cloth is used as the reference value.
Even if it is processed like this, the overall volume does not decrease. This result
As a result, in BGM mode, automatic performance suitable for BGM is performed.
The effect is obtained.

Further, according to the present invention, as described in claim 2, performance information input means for inputting at least performance information relating to the pitch and volume of a musical tone, and a dynamic range of the performance information inputted are changed and output. Change output means , less
Both normal mode and classic mode can be selected.
Mode selecting means, and the change output means is
When the normal mode is selected by the
The output volume is directly proportional to the input volume
So as to increase, and set the output volume for the input volume,
The classic mode is selected by the mode selection means.
Output volume increases as the input volume increases,
Input volume is lower than the reference value.
If so, the output volume will be lower than in normal mode, and conversely
If the output volume is higher than the standard value, the output volume is in normal mode.
The output volume relative to the input volume so that
It is characterized by setting.

The performance information changing device according to claim 2 is
In normal mode, the output volume is close to the input volume.
Power. On the other hand, in classic mode, input
If the volume is lower than the reference value, the output volume will be
Output when it is larger than the reference value.
Make the volume louder than in normal mode. That is,
Dynamic range of performance information in Lasik mode
Spread it into a form with intense intonation. Moreover, performance information
The volume at the peak position of the volume distribution is used as the reference value.
Therefore, the overall volume will not increase even if processed in this way.
No. As a result, the classic mode is more realistic
The effect that dynamic automatic performance is performed is obtained.
You.

The performance information changing device for the automatic performance device according to the above-mentioned claim 1 or claim 2 is an ordinary music piece, for example, B.
It may be configured as a dedicated device for changing to a GM style or a dedicated device for changing to a dynamic performance .

[0012]

Embodiments of the present invention will be described below with reference to the drawings. The first embodiment is an application of the present invention to an upright type automatic playing piano.

The automatic playing piano 1 of the first embodiment has keys 2
Each key 2 is provided with a solenoid 3 arranged behind each key 2 for driving the control unit 3 and a control unit 4 for driving and controlling the solenoid 3. During automatic performance, the control unit 4 reads performance information from the floppy disk 5 mounted on the control unit 4 and drives the solenoid 3 at a predetermined timing given by the performance information. Output to the drive circuit 6. This solenoid drive circuit 6 generates a power signal for actually driving the solenoid. As a result, the solenoid 3 pushes up the back of the key 2. Then, the action mechanism 7 including the hammer 8 is driven, the string 9 is struck, and a musical sound is generated. The control unit 4 is configured as a logical operation circuit including a CPU, ROM, RAM and the like. The basic structure of these is the same as that of an ordinary automatic piano.

On the other hand, as shown in FIG. 2, the automatic playing piano of the present embodiment has a characteristic configuration that the operation panel 41 of the control unit 4 has three kinds of playing modes of normal mode, BGM mode and classic mode. Performance mode selection buttons 42a to 42c for selecting one from the inside
, And executes an automatic performance process as shown in FIG. In FIG. 2, reference numeral 43 is a reproduction button for instructing automatic performance, 44 is a recording button for instructing recording, and reference numeral 51 is a floppy disk driver.

The automatic performance process is executed when the reproduction button 43 is turned on. First, the performance mode is determined depending on which of the performance mode selection buttons 42a to 42c is turned on (S10). Next, the volume conversion table to be used is set according to this performance mode (S
20, S21, S22).

Here, the volume conversion table is RO
It is stored in M and becomes as shown in FIG. The horizontal axis of this figure is the original volume as input (hereinafter,
The input sound volume ST) and the vertical axis represent the converted sound volume (hereinafter referred to as output sound volume STo). Volume ST, S
To is represented by a numerical value of 0 to 127 based on the MIDI standard, and the larger the numerical value, the louder the volume.

As tables, a normal table TB0 represented by a straight line proportional to 45 degrees diagonally, a BGM table TB1 which intersects with the normal table TB0 at the center and has a smaller inclination than this, and these tables TB0 also at the center. , TB1 and input volume ST = 0 to 63
Becomes convex in the range of, and the input volume ST = 64 to 127
Classic mode table TB that is convex upward in the range of
2 and are remembered.

In S20, specifically, the following processing is executed. That is, in order to indicate which of the volume conversion tables is used, hexadecimal numbers "00", "01" or "02" are set in the upper 8 bits of the control signal used in the volume conversion processing described later. Here, "00" is in the normal table TB0, "01" is in the BGM table TB1,
"02" corresponds to the classic table TB2. The lower 8 bits of this control signal are combined with the keystroke strength data in the performance information as described below. Hereinafter, the entire control signal is referred to as a reference address number, the signal set in the upper 8 bits is referred to as a table designation number, and the signal combined with the lower 8 bits is referred to as a volume designation number.

When the volume conversion table is set in this way, the performance information recorded on the floppy disk 5 is read via the floppy disk driver 51 (S3
0), the keystroke strength data in the performance information is combined with the lower 8 bits as the volume designation number to synthesize the reference address number (S40). Then, based on the reference address number, the volume conversion table stored in advance in the ROM is referred to (S50), the input volume ST is converted into the output volume STo, and the solenoid drive command signal is output (S60). Then, the processing from S30 onward is repeatedly executed until all the performance information is processed (S7).
0).

As a result of the above, for example, if the input sound volume ST = 40 in the BGM mode, the reference address number is "0127" in hexadecimal notation. Therefore, as shown in FIG.
A musical sound is reproduced based on the output volume STo = 52 stored in the address "0127" in the ROM. Similarly, if the input volume ST = 86, the hexadecimal notation “0
A musical sound is reproduced based on the output volume STo = 73 stored in the address "155".

In the classic mode, if the input volume ST = 40, a musical tone is reproduced based on the output volume STo = 14 stored in the address "0227" in hexadecimal notation. If the input volume ST = 86, Output volume STo stored in address "0255" in hexadecimal notation
= 112, the musical sound is reproduced.

As a result, as shown in FIG. 4, the input volume ST
If the dynamic range at is DR,
In the BGM mode, reproduction and performance are performed with a dynamic range DR1 narrower than this, and in the classic mode, reproduction and performance are performed with a wider dynamic range DR2.

If this is expressed as a volume distribution frequency,
As shown in FIG. In the normal performance software according to the MIDI standard, the volume distribution is configured so that a peak appears near the center in the stages of 0 to 127, and has a frequency distribution like the normal distribution line L0 shown by the solid line in the figure. . When the volume is converted in the BGM mode according to this embodiment, the frequency distribution is such that both the high volume part and the low volume part are small as shown by the BGM distribution line L1 shown by the one-dot chain line in the figure. Therefore, the change in the volume of the performance song is narrowed, and the song has a calm image with less intonation than the image of the original song. However, as can be seen from this frequency distribution, the center of the volume does not change from the original one, and the volume as a whole does not change. Therefore, according to the present embodiment, it is possible to change the performance mode to a BGM-like performance without reducing the volume, and when performing a BGM performance using an automatic performance piano in a lounge or the like that is rather wide.
You can listen to people who are far away, and you can play without worrying.

On the other hand, looking at the classic mode,
Like the classical distribution line L2 shown by the two-dot chain line in the figure,
The frequency distribution spreads to a higher volume part and a lower volume part than the normal distribution line L0. Therefore,
The volume of the playing song changes widely, resulting in a dynamic image with more intonation than the original image.
However, as can be seen from this frequency distribution, the center of the volume does not change from the original one, and the volume as a whole does not change. Therefore, according to the present embodiment, it is possible to change the performance mode to a dynamic performance without giving a noisy impression.

When a BGM-like performance is performed by the conventional device, the distribution line is only shifted to the lower side like the low volume distribution line LL shown by the dotted line in the figure, so the original music is a song with a lot of intonation. In some cases, a person who is listening nearby may be distracted by the music and does not become BGM at all.
It is the same as if no performance is being performed. Also, when trying to perform a dynamic performance with a conventional device, the distribution line only shifts to the higher side like the high volume distribution line LH shown by the dotted line in the figure, so rather than giving a dynamic spread to the song in a small room, etc. Sometimes it just makes annoying impressions.

Next, the second embodiment will be described. Second
In the embodiment, as shown in FIG. 7, a slide switch 45 for designating a dynamic range is arranged on the operation panel 41 of the control unit 4, and +3, +2, +1, 0, -1,
The dynamic range can be selected from 7 levels of -2 and -3. Then, in correspondence with this, FIG.
As shown schematically, the table TB + 3 for the dynamic range "+3", the table TB + 2 for the dynamic range "+2", and the table
Table TB + 1 of "1", table TB0 of "0",
A table TB-1 of "-1" and a table TB of "-2"
-2 and a table TB-3 of "-3" are stored in advance.

The control process is the same as in the first embodiment, and the upper 8 bits of the reference address number for volume conversion are set in accordance with the operation position of the slide switch 45 when the automatic performance mode is designated. "00" to "06" are set as the table designation numbers, and the keystroke strength data in the performance information read from the floppy disk 5 is set to the lower 8
The volume conversion table is referenced in combination with the bit volume designation number. Also in this embodiment, as in the case of the volume distribution frequency display in FIG. 9, it is possible to perform a BGM-like calm image reproduction performance or a dynamic image reproduction performance without changing the volume as a whole. You can

As the slide switch 45, a stepless one can be adopted. In that case, the volume conversion tables are complemented with each other, or the volume conversion condition is given by a function instead of a table. do it. Although the embodiments of the present invention have been described above, the present invention is not limited to these, and various modes can be adopted without departing from the scope of the present invention.

[0029] For example, the sound volume conversion table when classic mode is selected, rather than a curve relationship, Figure 1
It is also possible to have a linear relationship as indicated by reference numeral TB22 in 0. In addition to the BGM mode and the classic mode, a jazz mode, a rock mode, a folk song mode, etc. are provided, and the original song is a typical song of each genre in the jazz song, rock song, and folk song. The volume distribution may be changed as shown in FIG. In addition to this, it is possible to select the mode by the song name or the composer name, and change the volume distribution for the song or the volume distribution according to the style of the composer.

In addition, instead of being directly incorporated in the automatic performance system, a device for rerecording a normally recorded song in BGM style may be constructed. In addition, not only when reproducing data stored in a floppy disk or the like for automatic performance, but in a system in which the music actually played by an electronic musical instrument or the like is output from another electronic sound source or an automatic playing piano, An electronic sound source or an automatically playing piano can be used in the form of changing the dynamic range and outputting a musical sound .

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an automatic performance system according to an embodiment.

FIG. 2 is a configuration diagram of a system control system of the first embodiment.

FIG. 3 is a flowchart of an automatic performance process in the first embodiment.

FIG. 4 is a schematic diagram of a volume conversion table in the first embodiment.

FIG. 5 is an explanatory diagram of a specific example of volume conversion in the first embodiment.

FIG. 6 is an explanatory diagram showing a volume distribution state when the performance mode is changed in the first embodiment in comparison with a volume distribution state when the performance mode is changed by a conventional performance mode changing method.

FIG. 7 is a configuration diagram of a system control system of a second embodiment.

FIG. 8 is a schematic diagram of a volume conversion table in the second embodiment.

FIG. 9 is an explanatory diagram showing a volume distribution state when the dynamic range is changed in the second embodiment.

FIG. 10 is a schematic diagram of a volume conversion table in a modified example .

[Explanation of symbols]

1 ... Automatic playing piano, 2 ... key, 3 ... solenoid, 4 ... control unit, 5 ... floppy disk, 6 ... solenoid drive circuit, 7 ...
Action mechanism, 8 ... Hammer, 9 ... String, 41
... Operation panel, 42a to 42c ... Performance mode selection button, 45 ... Slide switch.

Claims (2)

(57) [Claims] 1. A least tone pitch, and the performance information input means for inputting performance information about the volume, and changes output means for changing the dynamic range of performance information that is the input, at least normal mode and BGM mode Selectable
Mode changing means, and the change output means selects the normal mode by the mode selecting means.
In case of playing, it is input by the performance information input means.
The output volume increases as the volume (called the input volume) increases.
Output volume relative to input volume so that it increases in direct proportion
Is set, and the BGM mode is selected by the mode selection means.
If the output volume increases as the input volume increases
And the input volume is the volume of the performance information.
It must be lower than the volume at the peak position of the distribution (called the reference value).
Output volume is louder than in normal mode,
If the output volume is higher than the reference value, the output volume is
The input volume
A performance information changing device for an automatic performance device , characterized by setting an output volume . Wherein at least tone pitch, and the performance information input means for inputting performance information about the volume, and changes output means for changing the dynamic range of performance information that is the input, at least normal mode and classic mode Selectable
And a normal mode is selected by the mode selection means in the change output means.
In case of playing, it is input by the performance information input means.
The output volume as the volume (referred to as input volume) increases
Output volume relative to input volume so that it increases in direct proportion
, The classic mode is selected by the mode selection means.
Output volume increases as the input volume increases,
The input volume is increased so that the performance information has
Lower than the volume at the peak position of the volume distribution (referred to as the reference value)
If the output volume is lower than in normal mode,
If it is larger than the above reference value, the output volume will be
Output sound for the input volume
A performance information changing device for an automatic performance device , characterized by setting a quantity .