JPH07175468A - 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 by a keyboard operation. These piano sounds are picked up by a sound pickup microphone 21 and are produced from speakers 55a, 55b as well via an ADC 33, DSP 35, etc. These sounds are not the sounds formed by merely picking up the piano sounds and producing these sounds as they are 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. Even if, therefore, a player plays this piano in, for example, an ordinary narrow room, 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 piano mechanism M1 for producing sound, a sound pickup means M2 for picking up a musical sound produced by the acoustic piano mechanism M1, and a reverberation for giving a predetermined reverberation effect to the waveform of the musical sound picked up by the sound pickup means M2. The present invention is characterized by including an effect giving means M3 and a musical sound output means M4 for outputting a musical sound to which the reverberation effect has been given by the reverberation effect giving means M3.

According to a second aspect of the present invention, in the acoustic-electronic composite piano according to the first aspect, the reverberation effect imparting means has a predetermined reverberation with respect to the waveform of the musical sound picked up by the sound pickup means. It is characterized in that it is configured to add an effect and subtract the original musical tone waveform data.

[0007]

The acoustic acoustic sensor of the present invention having the above structure
According to the electronic compound piano, a musical sound (acoustic piano sound) is emitted from a well-known acoustic piano mechanism M1 that causes a string to be struck by an external force generated by pressing a key. On the other hand, the sound pickup means M2 picks up the musical sound produced by the acoustic piano mechanism M1, the reverberation effect giving means M3 gives a predetermined reverberation effect to the waveform of the picked up musical sound, and the reverberation effect is given. The musical sound output means M4 outputs the musical sound.

Therefore, from the present compound piano, an acoustic piano sound is emitted from the acoustic piano mechanism M1, and a reverberation effect sound generated based on the acoustic piano sound is output from the musical sound output means M4 such as a speaker. Will be issued. The reverberant sound effect emitted from this speaker can add various reverberant effects to the original acoustic piano sound, so, for example, an acoustic piano sound played in a small room alone will produce a great reverberant effect. Although you can't get it, if you add a reverberation effect that simulates a state where reverberation sound remains for a long time like in a concert hall, the acoustic piano sound and the reverberation effect sound that are generated can produce a very rich sound. You can

Further, the touch feeling peculiar to the acoustic piano remains unchanged. Then, in a normal electronic piano, a method may be adopted in which a result of sampling a waveform when played on an acoustic piano is stored in a memory as PCM waveform data and the PCM waveform data is read to form a musical sound. , In that case, in order to simulate an actual acoustic piano, a very large memory capacity is required, whereas in the case of the present invention, the sound source is only the acoustic piano,
As a result, a memory for waveform data and the like and an electronic sound source in the electronic piano are completely unnecessary.

According to the second aspect of the present invention, the reverberation effect imparting means M3 imparts a predetermined reverberation effect to the waveform of the musical sound picked up by the sound pickup means M2, and at the same time, the original musical tone waveform data is reproduced. Subtract. If the original musical tone waveform data is not subtracted, a sound that simply outputs an acoustic piano sound through a speaker or the like will be produced, and will overlap with the live piano sound. However, in reality, there is no big inconvenience, but if you subtract the original musical tone waveform data as described above, it will be a form that supplements only the reverberation part that does not come out from the acoustic piano alone from the speaker,
A rich sound can be obtained without disturbing the acoustic piano sound.

[0011]

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 provided with a keyboard device 11 having 88 keys 11a, a string striking mechanism 13 including a hammer 15, and a sounding body 19 (see FIG. 2) such as the strings G and the soundboard K shown in FIG. 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 has a sound pickup microphone 21.
And a panel section 23 provided with various switches such as a power switch and a mode designating switch, and an input signal from the panel section 23 is received through an interface (I / F) 25,
CPU 27 that executes various control processes and this CPU 2
A ROM 29 having a program memory for various control processes by 7, a RAM 31 storing a delay time such as a delay element described later for each mode, and a sound pickup microphone 21 to an A / D converter (ADC) 33. A digital signal processor (DSP) 35 for performing processing for adding a predetermined reverberation sound to the data input via
These are interconnected via a system bus 37.

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.

The DSP 35 has a D / A converter (DA
C) 51 is connected to the DAC 51. Speakers 55a and 55b are connected to the DAC 51 via two sound producing systems, that is, amplifiers 53a and 53b, respectively. The speakers 55a and 55b may be arranged, for example, near the upper end of the upper front plate (not shown) of the acoustic piano.

The sound pickup microphone 21 is the sound pickup means M of the present invention.
It works as 2 and picks up the piano sound emitted from an acoustic piano. For example, as shown by the solid line in FIG. 3A, the sound pickup microphone 21 may be arranged between the string G and the soundboard K, or as shown by the chain double-dashed line, the sound pickup microphone 21 may be located above the string G. It may be arranged at.

Further, the sound pickup means M2 is not limited to a microphone, and a pickup 71 may be employed instead of the sound pickup microphone 21 as shown in FIG. 3B, for example. The pickup 71 is preferably one that can cover the frequency band of the sound generated in the acoustic piano AP, such as a piezoelectric type or an electrodynamic type.

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 six multipliers (first multiplier 46a, The second multiplier 46b, ..., The sixth multiplier 46f) and six adders (the first adder 47a, the second adder 47b, ..., The sixth adder 47f) and the like.

The delay time (delay time) can be changed for each of the five delay elements 45a to 45e, and the first delay element 45a, the second delay element 45b,
The delay time corresponding to each of the fifth delay elements 45e is DT1, DT2, ..., DT5. On the other hand, the multiplication coefficient can be changed for each of the five multipliers 46a to 46e, and the first multiplier 46a, the second multiplier 46b,
The multiplication coefficients corresponding to the fifth multiplier 46e are a1, a2 ,. On the other hand, the sixth multiplier 46
The multiplication coefficient of f is fixed to "-1".

The reverberation effect mode ("ROOM", designated by the mode designating switch of the panel unit 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. First,
The panel event process (S100) will be described with reference to the flowchart of FIG. This process is performed by the panel unit 2
It is a process of three relations, and it is first determined whether or not any of the reverberation effect setting mode switches is turned on (S1).
10) If none of them is turned on, the process proceeds to S160, other switches and other corresponding processes are performed, and the process ends.

On the other hand, if the mode switch is on (S110: YES), it is determined which mode switch is on (S120), and the delay times DT1 to DT5 and the multiplication coefficient a1 of the corresponding mode are determined. The value of a5 is set (S130 to S150). 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 S130 to S150.

From the compound piano 1, the acoustic sounding mechanism (such as the string G and the soundboard K) in the acoustic piano section AP emits an acoustic piano sound, and the piano sound emitted from the acoustic piano is generated. The pickup microphone 21 picks up.

The analog signal picked up by the pick-up microphone 21 is A
A / D converted by DC33 and input to DSP35, DS
After applying a predetermined reverberation effect by P35, DAC
The signal is D / A converted at 51 and emitted from the speakers 55a and 55b via the amplifiers 53a and 53b.

The electronic piano sounds emitted from the speakers 55a and 55b are not simply picked up acoustic piano sounds and pronounced as they are. That is, the five delay elements 45a to 45d in the DSP 35 are selected depending on the mode such as "ROOM", "STAGE", or "HALL" selected by the mode designating switch of the panel unit 23.
Since the delay times DT1 to DT5 and the multiplication coefficients a1 to a5 are set for the 45e and the five multipliers 46a to 46e, respectively, the reverberation effect according to the set values is added. Since the multiplication coefficient of the sixth multiplier 46f is "-1", the waveform data of the original acoustic piano sound is subtracted, and only the waveform data of the reverberation sound is output.

As described above, in the case of this embodiment, "RO
Any of three modes, OM "," STAGE ", and" HALL "can be 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. Therefore, for example, an acoustic piano sound played in a small room alone cannot produce a great reverberation effect, but when the [HALL] mode is selected, the reverberation sound is considerably generated like the concert hall in the generated electronic piano sound. By adding a reverberation effect that simulates the state that remains for a long time, a very rich sound can be produced.

Therefore, it is possible to enjoy the atmosphere as if one were playing in a concert hall while staying in a general home. Further, since the keyboard device 11 is the keyboard of the acoustic piano AP 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, although the number of the sound pickup microphones 21 is one and the number of the speakers 55a and 55b is two in the above-described embodiment, it is preferable to provide a large number of the sound pickup microphones 21 in order to prevent sound leakage. Further, if the number of speakers is increased, the reverberant sound spread feeling is further improved.

[0029]

As described above, the acoustic
According to the electronic compound piano, by picking up an acoustic piano sound and a sound with the reverberation effect added by picking up the acoustic piano sound at the same time, the reverberation effect can be freely added and the touch feeling of the acoustic piano can be provided. . Therefore, for example, an acoustic piano sound played in a small room cannot produce a great reverberation effect, but a reverberation sound effect that simulates a state where the reverberation sound remains for a long time like a concert hall is added to the piano sound. If you do, you can produce a very rich sound. Moreover, the electronic sound source and the waveform memory in the electronic piano are completely unnecessary.

[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.

3A is an explanatory view showing a mounting position of a sound pickup microphone, and FIG. 3B is an explanatory view showing a mounting position when a pickup is used.

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

FIG. 5 is a flowchart showing a panel event process of this embodiment.

[Explanation of symbols]

1 ... Acoustic / electronic compound piano, 11 ... Keyboard device, 13 ... String striking mechanism, 21 ... Sound pickup microphone, 23
... panel section, 45a to 45e ... first to fifth delay elements,
46a-46f ... 1st-6th multiplier, 47a-47f ...
First to sixth adders, 53a, 53b ... Amplifier, 55
a, 55b ... speaker, AP ... acoustic piano section, EP ... electronic musical instrument section, G ... string, K ... soundboard

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G10K 15/12

Claims (2)

[Claims] 1. An acoustic piano mechanism for striking a string by an external force generated by key depression, a sound pickup means for picking up a musical sound produced by the acoustic piano mechanism, and a waveform of the musical sound picked up by the sound pickup means. An acoustic-electronic composite piano comprising: a reverberation effect imparting means for imparting a predetermined reverberation effect to the reverberation effect; and a musical sound output means for outputting a musical tone to which the reverberation effect is imparted by the reverberation effect imparting means. 2. The reverberation effect imparting means is configured to impart a predetermined reverberation effect to the waveform of the musical sound picked up by the sound pickup means and subtract the original musical tone waveform data. The acoustic / electronic composite piano according to claim 1, which is characterized in that.