JPH07175474A - Combined acoustic/electronic piano - Google Patents

Abstract

PURPOSE:To provide a combined piano capable of freely adding a reverberation effect to piano sounds and having the touch feel, etc., of an acoustic piano. CONSTITUTION:Acoustic piano sounds are produced from acoustic sound producing mechanisms and electronic piano sounds are produced from an electronic musical instrument EP by a keyboard operation. These electronic piano sounds are not the sounds formed by merely simulating an acoustic piano but are the sounds obtd. by selecting an arbitrary mode from three kinds of modes; 'ROOM; the reverberation effect in a room', 'STAGE; the reverberation in a stage', 'HALL; the reverberation effect in a hall to be exclusively used for music' and adding the corresponding reverberation effect to the piano sounds by the DSP 35. Not such much high reverberation effect is obtd. only with the sounds of the acoustic piano played in, for example, a narrow room, but the reverberation remains fairly afterward when the 'HALL' mode is selected. The user is thus able to enjoy an atmosphere as if he is playing in a concert hall even in general home.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acoustic / electronic compound piano equipped with an acoustic piano mechanism as well as a mechanism for controlling and playing an electronic sound source, and in particular, to which various reverberations can be added. Regarding

[0002]

2. Description of the Related Art Since an acoustic piano is generally used in a stationary state,
There is a reverberation effect in the place where it is placed, but the reverberation sound cannot be changed. Therefore, for example, in a place such as a concert hall that was created with the reverberation effect in mind, the reverberation can remain for a long time, producing a very rich sound, but playing the same acoustic piano in a small room. However, no great reverberation effect can be obtained. And, in a general household, it is not always placed in a dedicated room considering the reverberation effect.

Further, in recent years, in order to obtain a high quality musical sound in an electronic piano, a method of sampling an actual musical instrument sound, storing it as a PCM waveform data in a memory, and reading the PCM waveform data to form a musical sound. By adopting, it is possible to reproduce a sound close to the excellent sound quality of an acoustic piano.
If the CM waveform data is to be stored in the memory for all keys of the piano according to the strength of keystroke, a huge storage capacity is required. Therefore, the memory is limited due to cost considerations. Further, the sound quality of the acoustic piano cannot be faithfully reproduced due to the sound being reproduced by the speaker. In addition, the touch feeling of the keyboard will be different from that of an acoustic piano.

In view of the above, according to the present invention, by combining a reproduction system for an acoustic piano and an electronic piano, it is possible to freely add a reverberation effect, which cannot be obtained by using them alone, and to provide a touch feeling of the acoustic piano. acoustic·
The purpose is to provide an electronic compound piano.

[0005]

The acoustic-electronic composite piano of the present invention, which has been made to achieve the above-mentioned object, is struck by an external force by a key depression as illustrated in the basic configuration diagram of FIG. An acoustic / electronic composite piano equipped with an acoustic piano mechanism M1 for producing a sound and an electronic musical instrument mechanism M2 for generating an electronic musical sound, and a result of sampling a waveform when the acoustic piano mechanism M1 plays Sampling waveform storage means M3 to be stored, keyboard operation detection means M5 for detecting the operating state and touch strength of the keyboard M4 in the acoustic piano mechanism M1,
The stored contents of the sampling waveform storage means M3 are stored on the basis of information such as the pitch and strength of the musical tone to be played, which is obtained based on the keyboard operation state detected by the keyboard operation detection means M5 and the touch strength. A musical tone waveform generation means M6 for reading out and electronically generating a musical tone waveform, a reverberation effect imparting means M7 for imparting a reverberation effect to the musical tone waveform generated by the musical tone waveform generation means M6, and the reverberation effect imparting means M7.
And a musical sound output means M8 for outputting a musical sound to which a sound effect is added by the above.

According to a second aspect of the present invention, in the acoustic / electronic compound piano according to the first aspect, the sampling waveform storage means M3 samples the waveforms obtained when the acoustic piano is played. It is characterized in that only the waveform component relating to the reverberation sound is stored.

[0007]

The acoustic acoustic sensor of the present invention having the above structure
According to the electronic composite piano, when the keyboard M4 is operated, a musical sound (acoustic piano sound) is emitted from the well-known acoustic piano mechanism M1 which causes a string to be struck by an external force generated by pressing a key. On the other hand, the keyboard operation detecting means M5 detects the operation state and the touch strength when the keyboard M4 is operated. Then, the musical tone waveform generation means M6 reads the stored contents of the sampling waveform storage means M3 and electronically generates a musical tone waveform based on information such as the pitch and intensity of the musical tone to be played, and the reverberation effect imparting means M7.
After the reverberation effect is added in, the musical sound to which the acoustic effect is added is output from the musical sound output means M8.

Therefore, from the present compound piano, an acoustic piano sound is emitted from the acoustic piano mechanism M1, and a predetermined reverberation effect is added to the electronic piano sound generated by the musical tone waveform generating means M6 of the electronic musical instrument mechanism M2. A musical sound output means M such as a speaker.
It will be emitted from 8. With respect to the electronic piano sound emitted from this speaker, the reverberation effect to be added can be variously changed. Therefore, for example, an acoustic piano sound played in a small room alone cannot produce a great reverberation effect. By adding a reverberation effect that simulates a state in which reverberant sound remains for a long time like a concert hall to the generated electronic piano sound, a very rich sound can be produced. In addition, the touch feeling peculiar to an acoustic piano remains the same.

As described in claim 2, as the waveform stored in the sampling waveform storage means M3, only the waveform component relating to the reverberation sound may be included in the result of sampling the waveform when the performance is performed in the acoustic piano. . By doing so, the capacity of the memory can be further reduced.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 2 is a block diagram showing a schematic configuration of an acoustic / electronic compound piano (hereinafter, simply referred to as compound piano) 1 of the present embodiment. As shown in FIG. 2, the composite piano 1 includes an acoustic piano section AP and an electronic musical instrument section E.
P and P.

First, the structure of the acoustic piano section AP will be described. Acoustic Piano Department AP
Is a keyboard device 11 having 88 keys 11a, a string striking mechanism 13 including a hammer 15, and a sounding body 1 such as a string and a soundboard.
9 (see FIG. 2). By the key depression operation, the string striking mechanism 13 is driven and the hammer (not shown) inertially moves, and the vibration generated by striking the string (not shown) is emitted as an acoustic piano sound in combination with the action of the sound board (not shown).

On the other hand, the electronic musical instrument section EP includes the keyboard device 1 described above.
Key sensor 2 for detecting the operation state of the key 11a in No. 1
1, 22 and a panel section 23 including various switches such as a power switch and a mode designating switch, and input signals from the touch sensor 21 and the panel section 23 are received through an interface (I / F) 25, A CPU 27 for executing various control processes, a ROM 29 having a program memory and a tone color data memory for various control processes by the CPU 27, a RAM 31 used for various processes such as an assigner process by the CPU 27, and instructions of the CPU 27. A tone signal generator 33 for generating a tone signal according to
And a digital signal processor (DSP) 35 for performing processing for adding a predetermined reverberation sound to the tone signal generated from the tone signal generator 33, which are connected to each other via a system bus 37. ing.

The mode designating switch of the panel section 23 will be described. In this mode, the reverberation effect modes are "ROOM", "STAGE", and "HALL".
And so on. "ROOM" simulates the reverberation effect in the room, "STAGE" simulates the reverberation effect on a relatively small stage, and "HALL" is a music hall created with the reverberation effect in mind. It is a simulated one.

A waveform memory 41 is connected to the tone signal generator 33, and the waveform memory 41 stores waveform data based on a result of sampling a waveform when a musical performance is performed on an acoustic piano.
Further, a D / A converter (DAC) 51 is connected to the DSP 35, and the speaker 51 is connected to the DAC 51 via two sound producing systems, that is, amplifiers 53a and 53b.
a and 55b are connected. This speaker 55a, 5
5b may be arranged near the upper end of the upper front plate (not shown) of the acoustic piano, for example.

Here, the key sensors 21 and 22 and related structures will be described with reference to FIG. As shown in FIG. 3, a stepped shutter 20 and key sensors 21, 22 are provided on the lower surface of the key 11a as keyboard operation detecting means M5. Each of the key sensors 21 and 22 has a pair of a light emitting element and a light receiving element, and is configured to emit an ON signal when the two elements are blocked. The stepped shutter 20 blocks the optical paths of the key sensors 21 and 22 with a certain time difference when the key 11a is pressed.

The CPU 27 has key sensors 21 and 22.
The time and the time difference when the optical path of the
Performance information is created based on the control program stored in. The event data that constitutes this performance information is configured as data in which one unit is 3 bytes consisting of a status byte of 1 byte and a data byte of 2 bytes. Of these, in the status byte, data indicating key depression (note on), key release (note off), etc. is set,
In the data byte, data indicating a key number (note number) that is a pitch, a keying strength (velocity) that is a volume, etc. is set.

Next, the DSP 35 will be described.
As shown in FIG. 4, the DSP 35 includes five delay elements (first delay element 45a, second delay element 45b, ..., Fifth delay element 45e) and five multipliers (first multiplier 46a, .., a fifth multiplier 46e), six adders (a first adder 47a, a second adder 47b, ..., A sixth adder 47f) and the like.

The delay time can be changed for each of the five delay elements.
The delay times corresponding to the delay element 45a, the second delay element 45b, ..., And the fifth delay element 45e are DT1 and DT, respectively.
2, ..., DT5. On the other hand, the multiplication coefficient can be changed for each of the five multipliers.
The multiplication coefficients corresponding to a, the second multiplier 46b, ..., And the fifth multiplier 46e are a1, a2 ,.

The reverberation effect mode ("ROOM", designated by the mode designating switch of the panel section 23 described above,
5) depending on "STAGE", "HALL", etc.)
Delay times DT1 to DT5 and five multiplication coefficients a1 to
a5 is set. That is, in the predetermined area of the RAM 31, the delay times DT1 to DT5 corresponding to these modes are set.
And the values of the multiplication coefficients a1 to a5 are stored, and when the mode is set, the CPU 29 reads the corresponding values and sets them.

Next, the operation of this embodiment will be described. FIG. 5 is a flowchart showing the overall processing of this embodiment. When the power is turned on, the CPU 27, the RAM 31, the sound source, etc. are initialized in step 100 (hereinafter, step is indicated by S). In the following S200, panel event processing, S3
At 00, keyboard event processing is performed respectively, and S300
After the keyboard event process of, the process returns to S200 and the following processes are repeated. The respective event processes S200 and S300 will be described below.

First, referring to the flow chart of FIG.
The panel event process (S200) will be described. This process is a process related to the panel unit 23. First, it is determined whether or not any one of the reverberation effect setting mode switches is turned on (S210), and if neither is turned on, the process proceeds to S260. Then, the corresponding processing such as other switches is performed, and the processing is ended.

On the other hand, when the mode switch is turned on (S210: YES), it is determined which mode switch is turned on (S220), and the delay times DT1 to DT5 and the multiplication coefficient a1 of the corresponding mode are determined. The values of a5 to a5 are set (S230 to S250). That is, as described above, these three modes “ROOM”, “STAGE”, and “HALL” are stored in a predetermined area of the RAM 31.
Delay times DT1 to DT5 and multiplication coefficients a1 to
The value of a5 is stored, and when the mode is set, the corresponding value is read and set in S230 to S250.

Next, referring to the flowchart of FIG.
The keyboard event process (S300) will be described. In this keyboard event processing, it is first determined whether or not there is an on event of the keyboard (S310), and if there is an on event (S310: YES), the key number (note number)
And data such as keystroke strength (velocity) are set (S
320). The tone signal generator 33 reads the waveform data corresponding to the set key number and the envelope waveform from the waveform memory 41, and generates tone waveform signals containing various overtone components according to the key touch and the key number. Then, the generated tone waveform signal is the DSP
To the DAC 35 and the amplifiers 53a and 53b,
Sound production is started through the speaker 55a (S34).
0).

On the other hand, if there is no on event in S310, it is judged whether or not there is an off event (S350), and if there is an off event (S35).
0: YES), the release data is set, and the present process is temporarily terminated. If there is no off event (S
350: NO), that is, if there is neither an on-vent nor an off-event, the keyboard event process is terminated without doing anything.

As described in detail above, the present composite piano 1 emits an acoustic piano sound from the acoustic sounding mechanism (strings, soundboard, etc.) in the acoustic piano section AP, and a musical tone signal in the electronic musical instrument section EP. The electronic piano sound generated by the generation unit 33 and the like is emitted from the speakers 55a and 55b after being given a predetermined reverberation effect by the DSP 35.

The electronic piano sounds emitted from the speakers 55a and 55b are not merely those simulating an acoustic piano, but in the case of the present embodiment, "R".
Any of three modes, "OOM", "STAGE", and "HALL", can be arbitrarily selected. "ROOM" is the reverberation effect in the room, "STAGE" is the reverberation effect on a relatively small stage, and "HALL" is For example, it is possible to realize a model that simulates the reverberation effect in a music hall, which was created with the reverberation effect during performance in mind.

In this way, since the reverberation effect can be varied in various ways, for example, a large reverberation effect cannot be obtained only with an acoustic piano sound played in a small room, but the [HALL] mode is selected to By adding a reverberation effect that simulates a state in which reverberant sound remains for a long time like a concert hall to the generated electronic piano sound, a very rich sound can be produced. Therefore, you can enjoy the atmosphere as if you were playing in a concert hall, even if you were at home. Also,
Since the keyboard device 11 is the keyboard of the acoustic piano itself, unlike the so-called electronic piano, the touch feeling peculiar to the acoustic piano is also maintained.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various modes can be adopted without departing from the scope of the present invention. For example, the waveform memory 41 in the above-described embodiment may store only the waveform component relating to the reverberation sound among the results of sampling the waveform when playing on an acoustic piano. By doing so, the capacity of the memory can be further reduced.

[0029]

As described above, the acoustic
According to the electronic compound piano, the reverberation effect can be freely added and the touch feeling of the acoustic piano can be provided by combining the upright acoustic piano and the reproduction system of the electronic piano. Therefore, for example, an acoustic piano sound played in a small room alone cannot produce a great reverberation effect, but a reverberation effect that simulates a state in which the reverberation sound remains for a long time like a concert hall is generated in the generated electronic piano sound. If added, a very rich sound can be produced.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a basic configuration of an acoustic / electronic composite piano of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a compound piano which is an embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating a key sensor and a related configuration according to an embodiment.

FIG. 4 is an explanatory diagram showing a configuration of a DSP of this embodiment.

FIG. 5 is a flowchart showing general processing of this embodiment.

FIG. 6 is a flowchart showing a panel event process of this embodiment.

FIG. 7 is a flowchart showing a keyboard event process of this embodiment.

[Explanation of symbols]

1 ... Acoustic / electronic compound piano, 11 ... Keyboard device, 13 ... String striking mechanism, 21, 22 ... Key sensor,
23 ... Panel section, 33 ... Music signal generating section, 27 ... C
PU, 31 ... RAM, 35 ... DSP, 41 ... Waveform memory, 45a-45e ... 1st-5th delay element, 46a
-46e ... 1st-5th multiplier, 47a-47f ... 1st
-Sixth adder, 53a, 53b ... Amplifier, 55a,
55b ... speaker, AP ... acoustic piano section,
EP: Electronic Musical Instrument Department

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G10H 1/32 Z 7/02 G10K 15/12

Claims (2)

[Claims] 1. An acoustic / electronic compound piano comprising an acoustic piano mechanism for striking a string by an external force generated by pressing a key and an electronic musical instrument mechanism for generating an electronic musical sound, wherein the acoustic piano mechanism. Sampling waveform storage means for storing the result of sampling the waveform when played at, keyboard operation detection means for detecting the operation state and touch strength of the keyboard in the acoustic piano mechanism, and detection by the keyboard operation detection means. Based on the information such as the pitch and intensity of the musical tone to be played, which is obtained based on the operated state of the keyboard and the touch strength, the stored contents of the sampling waveform storage means are read out to electronically generate a musical tone waveform. And a musical tone waveform generated by the musical tone waveform generating means. A reverberation effect imparting means for imparting sound effects, acoustic CEC piano to the tone output means for outputting the musical tone that has been granted reverberation effect by said residue sound effect imparting means, comprising the. 2. The sampling waveform storage means stores only a waveform component relating to a reverberant sound among results obtained by sampling a waveform when played on an acoustic piano. Acoustic and electronic compound piano.