JPH0799469B2 - Compound keyboard instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a compound keyboard instrument, and more specifically, it sets a key range for generating mechanical tones and a key range for generating electronic tones, and Partial on / off control of the generation of mechanical tones and the generation of electronic tones by one keyboard based on the setting of the range, so that the mechanical tones of one keyboard instrument can be adjusted according to the set keyboard range. The present invention relates to a keyboard instrument capable of generating electronic musical sounds in parallel with each other.

<Prior Art> Conventionally, as this type of compound keyboard instrument, there is one disclosed in Japanese Patent Application No. 60-131611 filed by the applicant of the present application, which is disclosed in Japanese Patent Application No. 60-131611. Such a compound keyboard instrument is capable of selectively producing a mechanical musical sound or an electronic musical sound for a plurality of keys constituting a keyboard.

<Problems to be Solved by the Invention> However, in the above-mentioned conventional compound keyboard musical instrument, when a mechanical tone is generated, the movement of the key based on the key operation is mechanically transmitted to the hammer. When an electronic musical tone is generated, an electronic musical tone is generated by an electric process based on a key operation, so that the musical tone generation timing is deviated based on a difference between a mechanical motion transmission time and an electrical processing time. There was a problem.

<Means for Solving Problems> In the compound keyboard instrument having the above configuration, a keyboard having a plurality of keys, and a mechanical tone generating means for mechanically producing a tone based on a key operation for each key. A sound generation control mechanism for permitting or prohibiting the generation of a musical sound in the mechanical musical sound generating means, a key pressing detecting means for detecting a key operation for each key, and an electronic musical sound based on the detection result of the key pressing detecting means. And an electronic musical tone generating means for generating a musical tone, a first key range for generating a musical tone by the mechanical musical tone generating means based on a key operation, and a second key for generating a musical tone by the electronic musical tone generating means based on a key operation. And a key range designating operator for designating a range, and in response to a designating operation in the range designating operator, the sound generation control mechanism is automatically driven so that the first range designated by the range designating operator is designated. Other than the key range of 1 When the tone generation by the mechanical tone generating means for the key range is prohibited and the key operation for the key belonging to the second key range designated by the key range designating operator is detected by the key depression detecting means. The first control means for permitting the generation of a musical tone in the electronic musical tone generating means, the musical tone generating timing of the mechanical musical tone generating means and the musical tone generating timing of the electronic musical tone generating means are matched with each other. The timing at which the electronic musical tone generating means starts to generate a musical tone electronically is delayed with respect to the timing at which the key depression detecting means detects the key operation for the second key range designated by the key range designating operator. The gist is that the second control means is provided.

<Operation and Effect> In the composite keyboard musical instrument according to the above configuration, the first keyboard range and the second keyboard range are set by the keyboard designating operator. In this case, the setting of the first key range and the second key range is arbitrary,
For example, they can be set redundantly. Then, when the player starts playing and operates a key in the first key range, the mechanical tone generating means mechanically operates based on the key operation under the control of the first control means and the sound generation control mechanism. Generates a musical sound. Further, when a key in the second key range is operated, the key depression detecting means detects it, and the electronic musical tone generating means electronically produces musical tone under the control of the first and second control means. generate. Therefore, by matching the time interval from the detection of the key depression by the key depression detecting means to the generation of the musical tone with the difference between the transmission time of the mechanical movement and the time required for the electrical processing,
It is possible to match the timing of generation of a mechanical musical sound and the timing of generation of an electronic musical sound, so that the compound keyboard instrument can be played with a natural feeling. Also,
With this composite keyboard instrument, the operation of permitting or prohibiting the generation of the musical tone can be simplified.

<Embodiment> The attached drawing is a partial cross-sectional side view showing an embodiment of the present invention, and this embodiment is one in which the present invention is applied to an upright type piano. In the figure, reference numeral 1 denotes one of the keys constituting the keyboard, and the key 1 is swingably supported by a piano body 5 at a fulcrum 3. The rear ends of these keys 1 are connected to a hammer 9 via a key action transmission mechanism 7. The hammer 9 is pivoted around a fulcrum 11 when a key is pressed and is supported by the piano body 5. Strike 13 Since the transmission mechanism 7 is basically the same as that used in a normal upright piano, the detailed description of its structure is omitted.

Each key 1 has a key switch circuit as a key depression detecting means.
When the key switch circuit 15 detects the start of key depression of each key 1 constituting the keyboard, the key switch circuit 15 delays the key code signal KC corresponding to the key 1 as a time interval generating means 17 Send to. The delay circuit 17 delays the key code signal KC by the time difference between the time required for the hammer 9 to strike the string 13 after the key is pressed and the time required for the generation of a musical tone by the electronic musical tone generating means described later, and the musical tone is reproduced. Generation circuit 19
Transfer to. Such a delay circuit 17 may be configured by a cascaded multi-stage inverter circuit.

The tone generation circuit 19 forms a tone signal TS having a pitch corresponding to the depressed key 1 based on the key code signal KC and a volume signal and tone color signal supplied from a switch panel (not shown), and the tone signal TS The TS is supplied to the sound system 21, which is composed of an amplifier and a speaker. The above tone generation circuit
19 and the sound system 21 together constitute an electronic musical sound generating means 22.

The switch panel is further provided with a key range designating switch for dividing the keyboard into a plurality of key ranges, and for the key 1 belonging to the key range designated for the generation of mechanical tones,
The drive signal ACT is supplied from the sound generation control circuit 23 to the solenoid 25 provided in association with the transmission mechanism 7. As a result, the plunger projects from the solenoid 25, causing the damper spoon 27 to abut against the lower end of the damper lever 29. As a result, when the key is pressed, the transmission mechanism 7 transmits the movement of the key to the hammer 9, and at the same time, the damper spoon 27 separates the damper 31 from the string 13 via the damper lever 29, which enables the generation of a mechanical tone by striking the string. To do. However, since the activation signal ATV for activating the key code signal KC corresponding to the key 1 in the key range is not supplied to the tone generation circuit 19, the key 1 pressed by the tone generation circuit 19 is The corresponding tone signal TS is not formed. The transmission mechanism 7, the hammer 9, the damper spoon 27, the damper lever 29 and the damper 31 constitute a mechanical tone generating means 33 as a whole, and the sound generation control circuit 23 uses the solenoid 25 and an activation signal to generate a key code signal KC.
The tone generation control means 35 is configured together with a part of the tone generation circuit 19 capable of forming the tone signal TS.

On the other hand, since the drive signal ACT is not supplied from the sound generation control circuit 23 to the key 1 in the key range assigned to the generation of the electronic musical sound, the plunger of the solenoid 25 is held in the retracted state and the damper spoon 27 is opened. Keep it away from the damper lever 29. As a result, even if the transmission mechanism 7 transmits the movement of the key to the hammer 9 during key depression, the movement of the damper spoon 27 is not transmitted to the damper lever 29, and the damper 31 remains in contact with the string 13. Therefore, no mechanical tone is generated even by striking a string. However, since the tone generation circuit 19 is supplied with the activation signal ATV from the tone generation control circuit 23, the tone generation circuit 19 forms the tone signal TS based on the key code KC corresponding to the depressed key 1 when the key is depressed. It will be possible.

Next, the operation of the embodiment will be described. When the player divides the keyboard into two parts and desires the generation of a mechanical musical sound in one key range and the generation of an electronic musical sound in the other key range, first,
The two key ranges are designated by operating the key range designation switches provided on the switch panel. As a result, the sound generation control circuit 23 supplies the drive signal ACT to the solenoid 25 provided for the key 1 belonging to one of the key ranges, and the damper spoon 27
To the damper lever 29. On the other hand, the tone generation control circuit 23 supplies the tone generation circuit 19 with an activation signal ATV for activating the key code KC corresponding to the key 1 belonging to the other key range. After that, when the player starts playing and presses the key 1 of one key range and the key 1 of the other key range at the same time, the key pressing operation for the key 1 belonging to one key range is applied to the hammer 9 via the transmission mechanism 7. The hammer 9 is transmitted to rotate the hammer 9 toward the string 13, and the damper lever 29 is rotated via the damper spoon 27 to separate the damper 31 from the string 13. As a result, the hammer 9 strikes the string 13 to generate a musical sound corresponding to the depressed key 1. The key-pressing operation of the key 1 belonging to one of the key ranges is detected by the key switch circuit 15, and the key code signal KC corresponding to the key 1 is supplied to the tone generating circuit 19 via the delay circuit 17. Since the activation signal ATV is not supplied to the key code signal KC, the tone signal TS is not formed. On the other hand, the key 1 belonging to the other key range
The key-pressing operation for is transmitted to the hammer 9 via the transmission mechanism 7, but since the damper spoon 27 is separated from the damper lever 29, no musical sound is generated even when the hammer 9 strikes the strings. However, the key pressing operation of the key 1 is detected by the key switch circuit 15, and the key code signal KC corresponding to the key 1 is detected.
It is supplied to the delay circuit 17. In the delay circuit 17, the hammer 9 is the string 13
The key code signal KC is delayed by the time difference between the time required to strike a string and the time required to generate a musical tone in the electronic musical tone generating means 22 and transferred to the musical tone generating circuit 19. Since the activation signal ATV is supplied to the key code signal KC corresponding to the key 1 belonging to the other key range, the tone generation circuit 19 presses the key based on the key code signal KC supplied from the delay circuit 17. A tone signal TS corresponding to the generated key 1 is formed, and the sound system 21 generates a tone based on this tone signal TS. The delay circuit 17 delays the key code signal KC by the time difference between the time required for the hammer 9 to strike the string 13 and the time required for the electronic musical tone generating means 22 to generate the musical tone, so that the hammer 9 strikes the string. The generation of the musical sound by the sound generation and the musical sound from the sound system 21 are generated at the same time, and the generation of the musical sound can be corresponded to the simultaneous key pressing operation in both key ranges.

In one embodiment, the sound generation control circuit 23 forms the drive signal ACT and the activation signal ATV by hardware based on the operation of the key range designating switch. However, the tone generation control means may be configured by a microcomputer system and the drive signal ACT and the activation signal ATV may be generated by software. Further, when the sound generation control means is constituted by the microcomputer system as described above, the time interval generation means can be realized by software. Furthermore, the present invention may be applied to a grand piano or a keyboard instrument other than a piano. Furthermore, in the above-described embodiment, the case where the keyboard is divided into two keyboard ranges for performance has been described, but the keyboard can be divided into three or more areas for performance.

[Brief description of drawings]

 The accompanying drawing is a side view, partly in section, of an embodiment of the present invention. 1 ... key, 15 ... key depression detecting means (key switch circuit), 17 ... time interval generating means (delay circuit), 22 ... electronic musical tone generating means, 33 ... mechanical musical tone generating means, 35 ... … Sound control means.

Claims (1)

[Claims] 1. A keyboard having a plurality of keys, a mechanical musical tone generating means for mechanically generating a musical tone based on a key operation for each key, and a pronunciation for permitting or prohibiting musical tone generation in the mechanical musical tone generating means. A control mechanism, a key depression detecting means for detecting a key operation for each key, an electronic musical tone generating means for electronically generating a musical tone based on the detection result of the key depression detecting means, and a mechanical operation based on the key operation. A key range designating operator for designating a first key range for generating a musical sound by the musical sound generating means and a second key range for generating a musical sound by the electronic musical sound generating means based on a key operation; In response to a designation operation on the operator, the sound generation control mechanism is automatically driven to cause the mechanical tone generating means for the key range other than the first key range designated by the key range designating operator. Musical tone generation With the ban,
When a key operation for a key belonging to the second key range designated by the key range designating operator is detected by the key depression detecting means,
The first control means for permitting the generation of a musical tone in the electronic musical tone generating means, the key generation timing of the musical tone of the mechanical musical tone generating means and the musical tone generation timing of the electronic musical tone generating means are made coincident with each other. Delaying the timing at which the electronic musical tone generating means starts to generate a musical tone electronically with respect to the timing at which the key depression detecting means detects the key operation for the second key range designated by the range designating operator. A compound keyboard instrument characterized by comprising two control means.