JPH02189587A - Automatic piano - Google Patents

Abstract

PURPOSE:To enable an excellent playback even when play data in half-pedal mode and two-step mode are used by deciding whether the operation mode of a pedal is the two-step mode or half-pedal mode from the contents of the play data and controlling the driving of the pedal. CONSTITUTION:This piano is equipped with a read means 1 which reads the play data out, a decision means 2 which decides whether the operation mode of the pedal is the two-step mode or half-pedal mode from the contents of the play data read out by the read means 1, and a pedal driving control means 3 which controls the driving of the pedal according to the contents of the play data read by the read means 1. Then the decision means 2 decides the play mode according to the contents of the play data read out by the read means 1 and the pedal driving control means 3 controls the pedal driving according to the decision result and play data. Consequently, even when the play data in the half-pedal mode is used and when the play data in the two-step mode is used, an excellent playback is made.

Description

Detailed Description of the Invention: "Industrial Application Field" The present invention relates to a player piano, and more particularly, to a player piano that can perform automatic performances well even when using recorded data with different operating modes of the pedal unit. Regarding.

``Prior Art'' In a player piano, performance data recorded on a floppy disk or the like is generally read out, and the keys and pedal solenoids are driven in accordance with this data.

By the way, when driving the pedal, if there are only two control states, "depression" and "release", the pedal solenoid may be controlled either on or off. Therefore, when recording performance data in such a mode (2-step mode), it is necessary to “depress” the pedal and
All you have to do is detect and record the two types of performance states, ``Release'' and ``Release''.
For reproduction, the pedal solenoid may be turned on/off based on the recorded data.

On the other hand, in order to further improve the reproducibility of performances, player pianos that reproduce so-called half pedals have been developed. In order to create the performance data used for this automatic beer, it is necessary to continuously detect and record the type of pedal depression. Then, during automatic performance, the pedal solenoid is driven by an amount corresponding to the recorded data. Such driving of the pedal maid is performed by controlling the power supplied to the pedal maid in stages. Note that this control is
Generally, pulse width modulation control is often used, but it can also be performed by controlling voltage, current, etc., for example.

``Problems to be Solved by the Invention'' By the way, when performance data in which pedal drive is only turned on and off is used in a player piano that has a half-pedal playback function, the format of the performance information is different, so A problem arose in that playback was not performed. In particular, when there are mixed phronopi discs that store performance data in different formats, the two-legged problem is likely to occur, and it has been desired to achieve compatibility.

This invention was made in view of the above-mentioned circumstances, and even when using a performance button in half-pedal mode,
It is an object of the present invention to provide a player piano that can reproduce satisfactorily even when using performance data in two-step mode.

"Means for Solving the Problems" The present invention has been made to solve the above problems, and as illustrated in FIG. 1, in a player piano that drives at least a pedal P based on performance data DP, Continuation means 1 for reading out the performance data; and this reading means 1
a determining means 2 for determining whether the operation mode of the pedal is a two-step mode or a half-pedal mode from the content of the performance data read by the pedal; It is characterized by comprising a pedal drive control means 3 for controlling the drive of the pedal.

"Operation" The performance mode is determined by the determination means 2 from the contents of the performance data read out by the reading means 1, and the pedal drive control means 3 controls the pedal drive based on the determination result and the performance data. Therefore, compatibility can be achieved even with performance data in different modes.

"Embodiments" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram showing the configuration of an embodiment of the present invention. In the figure, the self-playing grand piano GP is
When performance data is supplied from the controller 6, automatic performance is performed according to this performance data, and when the player performs a performance, performance data corresponding to this performance is supplied to the controller 6. There is. FIG. 3 is a side sectional view showing the external configuration of the self-playing grand piano GP and peripheral equipment. As shown in the figure, a controller 6 is built into a self-playing grand piano GP, and performance data is exchanged with a wagon 8 containing built-in peripheral equipment via a cable 7. The fan roller 6 is divided into a control section 6a and an I10 unit 6b within the key drive unit 1 of the automatic performance grand piano GP. As shown in FIG. 2, the control unit 6a includes a CPU 9 that controls each part of the device, and
ROM 10 in which programs used in are stored;
It consists of a RAM II in which various data are temporarily stored. This control section 6 is connected to a self-playing grand piano GP and a floppy disk driver (hereinafter abbreviated as FDD) 12 via an I10 unit 6b, and records/reads performance data.

Next, the slide/id 20a shown in FIG. 4 drives the loud pedal 21a, and FIG. 4 is a rear view thereof. As shown in FIG. 4, the end of the loud pedal 21a is rotatably connected to the lower end of a vertically movable rod 22a, and the upper end of the rod 22a is rotatably connected to the lower end of the plunger 20ap of the solenoid 20a. ing. on the other hand,
The upper end of the plunger 20ap of the solenoid 20a is connected to a rod 23a, and the rod 23a is connected to a damper drive mechanism within the piano body. The solenoid 20b is a solenoid that drives the shift pedal 21b, and as in the case of the loud pedal 21a, the respective driving forces are transmitted through the rods 22b and 23b. Further, a plunge +20ap is provided at the top of each thread/id 20a, 20b.

Sensors 35a and 35b are each provided to detect a movement amount of 20 bp. The sensors 35a and 35b include a gray scale that moves up and down integrally with the plunges +20ap and 20bp, a light emitting element that irradiates the gray scale with light from a fixed side, and a light receiving element that receives transmitted light from the light emitting element. The moving amount of the plungers 20ap and 20bp, that is, the driving amount of each pedal 21a and 21b is detected from the output signal of the light receiving element. Next, the sostenuto pedal 30 is
It is provided between the loud pedal 21a and the shift pedal 21b, and is connected to a single rod that is movable up and down.

Next, the operation of this embodiment with the above configuration will be explained.

First, performance data is supplied from the floppy disk driver FDDI2 to the CPU 9 via the I10 unit 6b. As a result, the subroutine shown in FIG. 5 is activated, and in step S1 performance information regarding the pedals is extracted for each pedal. This kind of processing is done by
This is because the MIDI information supplied from the floppy disk driver FDD12 includes performance information regarding keys that are unnecessary for pedal control. Now,
When the pedal information is extracted in step S1, C0NT I NUOUS VA is extracted in step S2.
It is determined whether LUE is [0] or not.

Kokote, what is C0NTINtJOUS VALUE?
This is a code indicating the amount of depression in the half-pedal mode, and indicates a depression value of [0 to [7F].

In this embodiment, a value of 16 steps is set in the above range. And C0NT I NUOU
If the values of S VA and LUE are [0], step S
Proceed to step 4, turn off solenoid 20a or 20b, and
0], the process advances to step S3 and half-pedal drive is performed. , Half pedal drive is C0NTINUOUS
Solenoid 2 sends a PWM signal according to the value of VALUE.
0a and 20b (see FIG. 4), and further performs servo control using the output signals of the sensors 35a and 35b as feedback signals. As a result, the loud pedal 21a or the shift pedal 21b becomes C0NT I NUOUSV.
It is driven by an amount corresponding to the value of ALUE.

When the process of step S3 or S4 is completed, the process of this subroutine is ended and the process returns to the main routine (path shown).

Here, a more specific example of MIDI information is shown in Figure 6 (1).
, shown in (2). In the figure, (1) is an example of the two-step mode, and (2) is an example of the half-pedal mode.

In FIG. 6(1), the code [40] on the upper side is a code indicating control of the loud pedal 21a, and the code [43] is a code indicating control of the shift pedal 21b. Further, [7F] on the lower side is a code indicating pedal depression, and [00 code] is a code indicating pedal release. The determination in step S2 shown in FIG. 5 is made based on the lower-order data, and as a result, [407F] and [437F]
When F] is supplied, it becomes rNOJ, and [40001
When [4300] is supplied, it becomes rYEsJ. If the determination in step S2 is "NO", half-pedal drive is performed in step S3, but since the drive amount in this case is r7FJ (maximum value), the process is similar to turning on the two-step mode. Further, if rYEsj is reached in step S2, the corresponding pedal is turned off in step S4. Therefore, step S3
and 34 are processed alternately, but the processing is substantially the same as on/off driving. Note that if the pedal is continuously depressed, the lower side of the data extracted from the MIDI information continues to be [7F], but even in this case, the result is the same as the 2-step mode on processing. become.

Next, the symbol ** on the lower side in Fig. 6 (2) is C0N
This is a value indicating the amount of luge pedal depression in TINUOUS VALUE, and is a value in 16 steps in the range of [00] to [7F]. However, [00] indicates off.

In the case of the MIDI information shown in FIG. 6(2), it is continuous mode data, and the value corresponding to the initial depression 1 is written in the initial **. Therefore, the value becomes a value other than [00], the determination in step S2 becomes rNOJ, and the process in step S3 is performed. In the process of step S3, when the value of ** is other than L7F], PWM drive corresponding to an intermediate value is performed, and a half-pedal performance is performed. And eventually the pedal is released and the MI
The lower side of the DI information is [00]. As a result, the determination in step S2 is [YESJ, and solenoid 2
0a or 20b is turned off (step S4). In this way, once the - degree continuous mode is entered, the continuous mode is continued until [001 is detected.

As mentioned above, the detection of the 2-step knob mode in this embodiment is performed depending on whether or not [7F] and [00] are alternately present, and the detection of the 1-step knob mode is performed depending on whether or not [7F] and [00] are present alternately. ] is detected.

Next, other embodiments of the invention will be described.

Note that the mechanical and electrical configurations of the other embodiments are similar to those of the above embodiment, and only the processing is different.

Here, FIG. 7 is a flowchart showing the processing in the same embodiment. This flowchart is different from the flowchart shown in FIG.
This is the point to move on to step 3.

The process in step 310 is a process for determining whether the mode is 2-step, knob mode or half-pedal mode (16-step, knob mode). This judgment is based on the fact that the lower data of the MIDI information is [
7F] and [00] are repeated alternately, it is determined to be 2-step mode, and the lower data is an intermediate value (over 00 and 7F).
(a value less than 3), it is determined to be the bar 7 pedal mode. Then, if it is determined that it is in 2-step mode, step 1. Proceed to Step Sll and complement the 2-step/tube mode data with the 16-step mode specifications. This complementation involves, for example, converting [7F] in 2-step mode into an intermediate value in accordance with the melody. The melody is detected, for example, by chord detection or keystroke intensity detection. Further, as another example of complementation, there is a process of decreasing the value of [7F] so as to match the unique characteristics of a piano pedal. After the processing in step Sll, the process moves to step S3, where half-pedal driving is performed. That is, step Sll
Through this process, half-pedal specification data is created in a pseudo manner, and the loud pedal or shift pedal is driven by this half-pedal specification data.

On the other hand, in the case of the half-pedal mode, the determination in step S10 leads to the processing in step S3, and normal half-pedal processing is performed.

``Effects of the Invention'' As explained above, according to the present invention, there is provided a reading means for reading performance data, and whether the pedal operation mode is the two-step mode or the half-pedal mode from the content of the performance data read by the reading means. Since the present invention includes a determining means for determining, and a pedal drive control means for controlling the drive of the pedal based on the determination result of the determining means and the performance data read by the successive output means, when performance data in half-pedal mode is used. However, even when using performance data in 2-step mode, it can be played well.
It is possible to make performance data of different types compatible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration of this invention, FIG. 2 is a block diagram showing the configuration of an embodiment of this invention, and FIG.
4 is a rear view showing the positional relationship of the pedal and a solenoid for driving the pedal, FIG. 5 is a flowchart showing the operation of the embodiment, and FIG.
FIG. 7 is an explanatory diagram showing an example of MIDI information in the same embodiment, and FIG. 7 is a flowchart showing the operation of another embodiment of the present invention.

Claims (1)

[Scope of Claims] A player piano that drives at least a pedal based on performance data, comprising a reading means for reading out the performance data, and whether the operation mode of the pedal is a two-step mode or a half-step mode based on the content of the performance data read by the reading means. A player piano characterized by comprising a determining means for determining whether the mode is a pedal mode, and a pedal drive control means for controlling the drive of the pedal based on the determination result of the determining means and the performance data read by the reading means. .