JPH06202634A - Electronic musical instrument - Google Patents

Abstract

PURPOSE:To obtain a feeling of extent by granting different localization to respective musical sounds when chords, etc., are played on the electronic musical instrument. CONSTITUTION:Musical sound signals generated by a sound source 11 are inputted to initial reflected sound adding circuits ER1-ER12 provided, timbre by timbre. The initial reflected sound adding circuits ER1-ER12 grant initial reflected sounds having mutually different characteristics to the inputted musical sound signals. The musical sound signals given the different initial reflected sounds are localized to mutually different spatial positions. Plural musical sound signals are generated at the same time like chords are played, and the mutually different initial reflected sounds are added to obtain a sound with a feeling of extent close to that of a natural musical instrument.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic musical instrument capable of adding a reflected sound to a formed musical sound.

[0002]

2. Description of the Related Art An electronic musical instrument emits a formed musical tone signal as sound through a speaker. Even if a plurality of tone signals are simultaneously formed of chords, these signals are added and synthesized and emitted from the same speaker. Therefore, no matter what pitch the musical tone is pronounced, the direction in which it is heard is almost the same.

[0003]

On the other hand, in the case of a natural musical instrument that physically produces a sound, the sound sources are located at different positions for each pitch, and when a chord is played, each sound source is separated. Since pitched musical tones are heard from different directions, a spacious feeling is created and a beautiful sound is produced. However, in the electronic musical instrument, since all musical tones are emitted from the same speaker as described above, such a sound cannot be produced.

It is an object of the present invention to provide an electronic musical instrument which can localize musical tones at different positions according to the change of reflected sound to produce a feeling of broadening of resonance.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a pitch designating means for designating a pitch of a musical tone to be sounded, a musical tone forming means for forming a musical tone signal having a pitch designated by the pitch designating means, and a musical tone formation. Reflected sound adding means for adding a reflected sound to the tone signal formed by the means, and reflection characteristic control means for controlling the reflection characteristic of the reflected sound adding means based on the pitch designated by the pitch designating means, It is characterized by having.

[0006]

In the electronic musical instrument of the present invention, the tone forming means forms the tone signal having the pitch designated by the pitch designating means.
The reflected sound adding means adds a reflected sound to this musical sound signal. The characteristic of the reflected sound added by the reflected sound adding means is controlled by the reflection characteristic control means based on the pitch of the musical sound. When the characteristics of the reflected sound change, the localization of the spatial sound image changes,
When multiple musical tones are pronounced at the same time, each musical tone sounds like being pronounced in a different place. This allows
A wide sound can be realized in the musical sound.

[0007]

1 is a block diagram of an electronic musical instrument according to an embodiment of the present invention. A sound source 11 is connected to the keyboard 10. The keyboard 10 has a switch for each key, and the switch corresponding to the depressed key is turned on. The sound source 11 detects this switch-on and forms a tone signal of the pitch assigned to the key. The musical tone signal generated by the sound source 11 is input to the reflected sound adding unit 12. The reflected sound adding unit 12 includes twelve initial reflected sound adding circuits ER1 to ER12.
Each of the initial reflected sound adding circuits ER1 to ER12 is C,
It corresponds to 12 semitones of C #, ..., B ♭, B. The tone signals formed by the sound source 11 are classified based on their note names and input to the corresponding initial reflected sound adding circuits ER1 to ER12.

The initial reflected sound adding circuit ER is composed of an FIR filter. By extracting a signal with a predetermined gain from each of a plurality of predetermined taps of a shift register (delay RAM) of the FIR filter, a response of a discrete initial reflected sound as shown in FIG. 2 to an input musical tone signal. Waveforms can be obtained.

In FIG. 2, an initial reflected sound adding circuit ER1
The response waveforms of ER12 are made different. If the response waveform is different, the spatial localization of the musical sound that has passed through the initial reflected sound adding circuit changes. Therefore, by generating different pitches (note names) that often form chords, for example, the response waveforms of the initial reflected sound adding circuits (ER1, ER5, ER8) such as C, E, and G, the chords are generated. When this is done, the musical tones forming the chord can be localized at different positions, and the chord can be broadened.

In FIG. 1, each initial reflection sound addition circuit ER
The musical sound signals to which the initial reflected sound is added in 1 to ER12 are input to the MIX circuit 13. The MIX circuit 13 is a circuit for adding and synthesizing the musical tone signals input from the initial reflected sound adding circuits ER1 to ER12. The MIX circuit 13 inputs the added and synthesized tone signal to the sound system 14.

The sound system 14 converts the musical tone signal into an analog signal, amplifies it, and then outputs it.

When the sound source 11 forms a plurality of musical sound signals in a time division manner, the reflected sound addition section 12 can also perform a time division operation, and the initial reflected sound addition circuits ER1 to ER12 are constructed by one circuit. be able to.

FIG. 3 is a diagram showing another embodiment of the present invention. This electronic musical instrument outputs the formed musical tone signal in stereo. A keyboard circuit 20 is connected to a keyboard (not shown). The keyboard circuit 20 is composed of a switch installed for each key of the keyboard, and the corresponding switch is turned on by pressing each key. The key depression detection circuit 21 is the keyboard circuit 20.
Scan the switch matrix of to detect the key pressed. The key depression detection circuit 21 outputs the key code KC corresponding to the depressed key to the tone generation channel assignment circuit 22. The tone generation channel assigning circuit 22 assigns a tone generation channel for retrieving a tone of the input key code KC by retrieving an empty channel from the 16 tone generation channels provided in the tone generator 23. Musical tone forming unit 23
Has a single tone signal forming circuit, and 16 tone generation channels are realized by the time division operation of this tone signal forming circuit. When the key is turned on, data such as a note-on signal, KC, and assigned channel is transmitted from the tone generation channel assigning circuit 22 to the tone forming section 23. Further, these data are also input to the control unit 25. The control unit 25 inputs the numbers (1 to 1) of the effect imparting system (reflected sound forming unit 28, sound image localization unit 29) for inputting the musical sound signal formed by the musical sound forming unit 23.
n) is specified. The number of the effect imparting system (designated number) is independently designated for each tone signal. The designated number is input to the shift register 27 via the selector 26 at a predetermined timing. The shift register 27 outputs a designated number designated for the tone signal of each channel to the distribution unit 24 at the timing when the tone formation unit 23 outputs the tone signal of channels 1 to 16 to the distribution unit 24. The distributing unit 24 inputs the tone signal to the reflected sound forming unit 28 of any one of 1 to n based on the designated number. Also,
The designated number of each channel stored in the shift register 27 is cyclically stored and read through the selector 26 unless a new one is input from the control unit 25. The control unit 25 switches the designated number for the tone generation channel for which a new musical tone signal is instructed, to the timing at which the tone generation channel data (old designated number) passes through the selector 26, and replaces this old designated number. And stores it in the shift register 27.

The reflected sound forming section 28 is a circuit similar to the initial reflected sound adding circuit ER shown in FIG. 1, and is a circuit for giving an initial reflected sound using an FIR filter. The sound image localization unit 29 is a circuit that distributes the musical sound signal to the left (L) right (R) 2 channels and converts it into stereo. The distribution adjusts the signal levels of the left and right channels according to the localization position of the sound image and changes the phase. Sound image localization unit 29 (29-1 to 29-1
29-n) outputs the musical tone signal to the adders 30L and 30R
By the left and right channels. After being added and synthesized, they are converted into analog signals by the D / A converters 31L and 31R, and sound is emitted from the audio systems 32L and 32R.

FIG. 4 is a diagram showing the function of the control unit 25.
The control unit 25 is composed of a table ROM, and when a key code KC of a musical tone is used as an address, the designated number for inputting the musical tone is read out. As an effect imparting system designation method based on the key code KC, a method of independently designating an effect imparting system for each key code as shown in FIG. 7A, or an effect imparting system as shown in FIG. Is provided for each key range (for example, one octave) and a method for designating an effect application system corresponding to the octave of KC that is input, and an effect application system is provided for each note name (C to B) There is a method to specify the corresponding effect imparting system.

Further, it is possible to integrally configure the reflected sound forming section and the sound image localization section. An example thereof is shown in FIG. In FIG. 5, taps are set for each LR channel in the delay RAM (shift register) for obtaining the initial reflected sound. It is possible to realize different phase differences (arrival time differences) on the left and right by slightly shifting the extraction addresses (tap) of both channels, and it is also possible to express the volume difference by adjusting the gains of the left and right channels. The sound image can be localized at a certain point by the phase difference and the volume difference. Further, it is possible to give different directivity to each reflected sound by changing the phase difference or the gain for each one of the discrete reflected sounds.

In the electronic musical instrument of FIG. 3, the parameters of the effect imparting system (reflected sound forming unit 28, sound image localization unit 29) are fixed, but in order to configure with a small number of effect imparting systems, the parameters are set. May be stored in the memory, and the parameter corresponding to the key code KC of the musical tone input from the musical tone forming unit 23 may be read from the memory and input to the effect imparting system. An example of such an effect imparting device is shown in FIG. A performance operator such as a keyboard is connected to the tone generation channel assignment circuit 41, and a key-on signal KON and a key code KC are input from the performance operator. The tone generation channel assigning circuit 41 is connected to the tone forming section and the control section 44. Pronunciation channel allocation circuit 4
When KON and KC are input, 1 assigns a tone generation channel to this musical tone, and assigns this to a musical tone forming unit 40 and a control unit 4
Instruct 4. The tone forming section 40 forms a tone signal in the designated sounding channel and inputs it to the distributing section 42. The distribution unit assigns to which reflected sound forming unit 43 the musical sound signal input from the musical sound forming unit 40 is input. This allocation is performed based on an instruction from the control unit 44. The reflected sound forming sections 43 are provided in the same number or less than the sound generation channels of the musical sound forming section 40. The control unit 44 allocates the reflected sound forming unit 43 and at the same time as the reflected sound forming unit
Input an appropriate reflected sound parameter for 3. This parameter is read from the parameter memory 45. The parameter to be read is determined based on the pitch (KC) of the musical tone. The musical tone signal to which the reflected sound is added by the reflected sound forming unit 43 is output to an output sound system or the like. As described above, since the parameters are input to the reflected sound forming unit 43 according to the musical tone signal to be generated, the reflected sound forming unit can be completed with a small number of channels.

Further, in the effect imparting apparatus of FIG. 3, if the effect imparting system is capable of time division operation like the tone forming section 23, the effect imparting system is operated in synchronization with the tone forming section 23 and the parameters are also set to this time division operation. It suffices to input them in synchronization.

[0019]

As described above, according to the present invention, since reflected sounds having different characteristics can be added to the formed musical tone signal based on the pitch, when a plurality of musical tones are simultaneously produced (such as chords). ) Can create a widespread sound.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an electronic musical instrument that is an embodiment of the present invention.

FIG. 2 is a diagram showing characteristics of an initial reflected sound added to a musical sound in the electronic musical instrument.

FIG. 3 is a block diagram of an electronic musical instrument which is another embodiment of the present invention.

FIG. 4 is a diagram illustrating an operation of a control unit of the electronic musical instrument.

FIG. 5 is a diagram showing another embodiment of the effect imparting device.

FIG. 6 is a diagram showing another embodiment of the effect imparting device.

[Explanation of symbols]

 12-Reflected sound adding section ER1 to ER12-Initial reflected sound adding circuit 28-Reflected sound forming section

Claims (1)

[Claims] 1. A pitch designating means for designating a pitch of a musical tone to be generated, a musical tone forming means for forming a musical tone signal having a pitch designated by the pitch designating means, and a musical tone signal formed by the musical tone forming means. A reflection sound adding means for adding a reflection sound, and a reflection characteristic control means for controlling a reflection characteristic of the reflection sound adding means on the basis of the pitch specified by the pitch specifying means. An electronic musical instrument.