JP2747150B2 - Musical instrument pedal operation information output 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 musical instrument pedal operation information output device which detects the operation of a pedal provided on a musical instrument and outputs the operation information.

[0002]

2. Description of the Related Art In a conventional electronic piano or automatic performance piano, as shown in FIG. 8, a detection switch 101 supported on a piano body detects the movement of a balance 103 which moves up and down in conjunction with a pedal. It has become. The detection switch 103 is a switch that detects a desired point in the operation range of the pedal. When the detection switch is turned on when the pedal is depressed, the control device provided in the piano generates and records information indicating that the pedal is depressed, and conversely, the detection switch is turned off. At the time, information indicating that the pedal was released was generated and recorded.

[0003]

However, a half-pedal playing method (a playing method in which the pedal is operated at a middle position without depressing the pedal) is performed.
When a performance is performed with the pedal depressed near the position where 01 is turned on and off, the detection switch is turned on and off frequently, and information indicating that the pedal has been released and information indicating that the pedal has been depressed. And are frequently generated. Therefore, when the performance information is reproduced, there is a problem that the pedal moves unnecessarily unlike the actual performance.

According to the present invention, there is provided a pedal operation information output apparatus in which information indicating that a pedal is released due to a slight change in the pedal operation position and information indicating that a pedal is depressed are not frequently generated. The purpose is to provide.

[0005]

In order to achieve the above object, according to the present invention, as shown in FIG. 1, pedal operation information for detecting operation of a pedal provided on a musical instrument and outputting the operation information is provided. In the output device, the pedal is determined in advance.
That a first detecting means for detecting whether or not positioned in the first position shallower than the position, the second position the predetermined said pedal is further depressed position relative to the first position The second detecting means for detecting whether or not the pedal is located at a deeper position and the first detecting means indicate that the pedal has moved to the shallower side of the depression after passing the first position. A pedal release information generating means for generating information indicating that the pedal has been released when detected,
The detection means, when said pedal is moved to the deep side of the depression through the second position is detected,
A pedal operation information output device for a musical instrument, comprising: pedal depression information generation means for generating information indicating that the pedal is depressed.

[0006]

According to the present invention having the above structure, the pedal is determined in advance.
That whether located shallower position than the first position,
The first detecting means detects whether or not the pedal is located at a position deeper than a predetermined second position which is a position further depressed with respect to the first position. When the first detecting means detects that the pedal has moved to the shallower side of the pedal after passing through the first position, the pedal release information generating means detects information indicating that the pedal has been released. generates, by the second detecting means, when the pedal is detected to have moved to deeper side of the depression through the second position, that pedal stepping information generating means, pedal is depressed Generate information to represent.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is an explanatory diagram showing a pedal operation detecting mechanism in the automatic performance piano of the present embodiment. In FIG.
A pedal 5 that is rotatable about a shaft 3 is attached to the bottom plate 1 of the piano. The rotation range of the pedal 5, that is, the operation range is a range of the positions P0 to P3. This pedal 5 is attached to one end of a swingable balance 9 supported by a fulcrum 7.
They are connected via connecting rods 11. The other end of the balance 9
It is connected to a raising rod 13 extending substantially vertically. The lifting rod 13 is used for adjusting the stringing operation start position of a string hammer (not shown).

[0008] A spring 15 is mounted between the fulcrum 7 of the balance 9 and the connecting rod 11, and the pedal 5 is urged upward by the spring 15. In the present embodiment, it is detected whether or not the pedal 5 is at a position shallower than the position P1 which is a position where the pedal 5 is depressed shallowly, and the position of the pedal 5 is further reduced from the position P2 which is a position where the pedal 5 is further depressed with respect to the position P1. Is also detected at a deep position. For this purpose, a shutter 17 is mounted between the fulcrum 7 of the balance 9 and the lifting rod 13, and a sensor 19 for detecting the movement of the shutter 17 is mounted on the bottom plate 1.

FIG. 3 is an explanatory diagram showing the configuration of the shutter and the sensor shown in FIG. FIG. 4 is a circuit diagram showing an electrical configuration of the sensor. Next, the configurations of the shutter and the sensor will be described. As shown in FIG. 3, the sensor 19 includes two photo interrupters 191 (first detecting means),
193 (second detecting means) is provided. Shutter 17
Is provided with a light shielding portion 171 having a small width and a light shielding portion 173 having a large width via a step portion 170, and the pedal 5 is moved to a position P1.
Each of the photointerrupters 191 and 193 can detect that the photointerrupter has passed the position P2.

The photo-interrupters 191 and 193 have light-emitting elements 21 and 23 and light-receiving elements 31 and 33 disposed opposite to the light-emitting elements. The shutter 17 is movably arranged between the light emitting elements 21 and 23 and the light receiving elements 31 and 33. The output of the light receiving element 31 is referred to as output A, and the output of the light receiving element 33 is referred to as output B.

FIG. 5 is a waveform diagram of the outputs A and B when the pedal 5 is operated. Next, a description will be given of an output change accompanying the pedal operation. When the pedal 5 is not depressed, both the photo interrupters 191 and 193 are shielded from light by the shutter 17, and as a result, the outputs A and
B both output H-level signals. Here, the pedal 5 is depressed.
When one light receiving element 31 receives light, the output B remains at the H level, but the output A changes to the L level. This position is the position P1 (first position).

Further, when the pedal 5 is depressed and the light receiving element 33 of the photo interrupter 193 also receives light, the outputs A and B are both at the L level. This position is the position P2 (second position). The change from the state where the pedal 5 is depressed to the lower limit to the time when the pedal 5 is released follows a change opposite to the above case.

FIG. 6 is an explanatory diagram showing the configuration of a control unit which receives the output and generates information indicating that the pedal is released (pedal release) and information indicating that the pedal is depressed (pedal depression). It is. In FIG. 6, the control unit 40
It includes a CPU 41, a ROM 43, a RAM 45, and an input / output circuit 49 connected to these via a bus 47. The input / output circuit 49 is connected to an external storage device for outputting pedal release / pedal depression information, in addition to the sensor 19.

FIG. 7 is a flowchart for explaining the operation of this embodiment. Next, the operation of the present embodiment will be described. In step S1, it is determined whether the previously output information is pedal release information or pedal depression information. This determination is made using a flag stored in the RAM 43. If the information is pedal release information, the process proceeds to step S2, and if the information is pedal depression information, the process proceeds to step S4.

In step S2, both outputs A and B are L
It is determined whether or not it is a level. If the outputs A and B are both at the L level, it means that the pedal 5 has reached the second position P2. In step S3, pedal depression information is output, and a flag in the RAM 43 is set to a code corresponding to the pedal depression information.

In step S4, it is determined whether both outputs A and B are at H level. If the outputs A and B are both at the H level, the pedal 5 has returned to the first position P1. In step S5, the pedal release information is output, and the flag in the RAM 43 is set to a code corresponding to the pedal release information. The execution of the processing of steps S1, S2, and S3 functions as pedal depression information generation means,
Execution of the processing of steps S1, S4 and S5 functions as pedal release information generating means.

In this manner, when the pedal is operated to a position shallower than the first position P1 from the detected operation position of the pedal, it is assumed that the pedal 5 is released and the pedal is operated to a position deeper than the second position P2. When the pedal 5 is depressed, when the pedal 5 is depressed and is operated to a position deeper than the second position P2 after passing through the first position P1, information indicating that the pedal 5 is depressed is generated. When the pedal has passed the second position P2 and returned to a position shallower than the first position P1, the pedal 5
Generates information indicating that the is released.

As described above, according to this embodiment, when the pedal returns to a position shallower than the position P1 where the depression is shallow, information indicating that the pedal is released is generated, and the position where the depression is further deepened relative to the position P1 is generated. When it is located at a position deeper than P2, information indicating that the pedal has been depressed is generated. Therefore, information indicating that the pedal has been released due to a slight change in the pedal operation position and information that the pedal has been depressed is generated. The information to be represented is not generated frequently.

Although the embodiments have been described above, the present invention is not limited to the above embodiments, but can be implemented in various modes. For example, the present invention can be applied to an electronic piano. Further, the present invention can be applied to any musical instrument provided with a pedal.

[0020]

As described above, according to the present invention, information indicating that the pedal is released due to a slight change in the pedal operation position and information indicating that the pedal is depressed are frequently generated. It is possible to provide a pedal operation information output device that does not need to be operated.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a basic configuration of the present invention.

FIG. 2 is an explanatory diagram showing a pedal operation detection mechanism in an electronic piano and an automatic performance piano.

FIG. 3 is an explanatory diagram illustrating a configuration of a shutter and a sensor illustrated in FIG. 2;

FIG. 4 is a circuit diagram showing an electrical configuration of a sensor.

FIG. 5 is a waveform diagram of a sensor output when a pedal is operated.

FIG. 6 is an explanatory diagram illustrating a configuration of a control unit.

FIG. 7 is a flowchart for explaining the operation of this embodiment.

FIG. 8 is an explanatory diagram showing a pedal operation detection mechanism in a conventional electronic piano or automatic performance piano.

[Explanation of symbols]

5 Pedal 17 Shutter 19 Sensor 4
0: control unit 43: ROM 45: RAM 191, 193: photo interrupter

Claims (1)

(57) [Claims] 1. A pedal operation information output device for detecting operation of a pedal provided on a musical instrument and outputting operation information thereof, wherein the pedal is located at a position shallower than a predetermined first position. First detecting means for detecting whether or not the pedal is located at a position deeper than a predetermined second position which is a position further depressed with respect to the first position. 2. When the detecting means detects that the pedal has passed through the first position and has moved to a shallower side of the depression, the pedal is released. A pedal release information generating unit that generates information indicating that the pedal has moved to a deeper side of the depression after passing through the second position. When the pedal is depressed, A pedal Stepping information generating means for generating to information, instrument pedal operation information output apparatus characterized by comprising a.