JPH06342285A - Effect adding device - Google Patents

Abstract

PURPOSE:To add effects with proper effect balance without causing a decrease in sound volume by correcting the sound volume level of a source sound on the basis of the set sound volume level of an effect adding circuit which is not mounted. CONSTITUTION:The musical sound signal of the source from a musical sound synthesizing circuit 6 is inputted to four multipliers 21-24 and multiplied by respective specific multiplicators. The multiplier 21 adjusts the sound volume level of the source sound to be given no effect and the multiplier 22 adjusts the sound volume level of an effect sound for giving reverberation by a reverberation circuit. The multiplier 23 adjusts the sound volume level of an effect sound for adding tremolos by a tremolo circuit and the multiplier 24 adjusts the sound volume level of an effect sound for giving a chorus by a chorus circuit. The dry sound and respective effect sounds which are adjusted in sound volume are added by adders 31-34 and outputted to a sound system 8 as a final musical sound signal which is given the effects.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an effect imparting device applied to an electronic musical instrument or the like.

[0002]

2. Description of the Related Art Conventionally, there has been known a technique of adding various effects such as reverb or tremolo to a musical tone signal, synthesizing and outputting it. For example, JP-A-3
No. 126091 discloses the original sound (so-called dry sound).
There is disclosed an effect adding device which multiplies a musical tone signal having an effect applied to a predetermined level value, adds the result to the original sound, and outputs the result. As a result, the degree of effect can be controlled only by adjusting the level value by which the musical tone signal having the effect is multiplied.

Similarly, a plurality of effect circuits for applying effects are provided, and original sounds are input to the plurality of effect circuits to apply respective effects, and the output from each effect circuit and the original sound. There is also a technology to synthesize and output.

In this case, the input or output of each effect circuit is level-controlled, the original sound is level-controlled, and these level-controlled tone signals are synthesized (added) to obtain a final tone signal. The effect balance is determined by the level control of the original sound and the level of each effect circuit.

[0005]

An electronic musical instrument having a plurality of effect circuits (referred to as a first electronic musical instrument) is provided.
Data such as the effect balance created in
There is a case where it is desired to use it with another electronic musical instrument (called a second electronic musical instrument). At this time, there is no problem if the first electronic musical instrument and the second electronic musical instrument have the same plurality of effect circuits.

However, the effect circuit provided in the first electronic musical instrument may not be provided in the second electronic musical instrument. In this case, the effect balance data originally created with the effect circuit,
Since it is used in an electronic musical instrument that does not have the effect circuit, there is a problem that the volume is reduced.

For example, the level of the original sound is halved, the level of the output obtained by adding reverb to the original sound is halved, and the effect balance data of the electronic musical instrument, which is the sum of these and is output, is directly provided with the reverb circuit. When used with an electronic musical instrument that does not have a reverb circuit, it is not possible to add reverb because it does not have a reverb circuit, but in addition to that, the level of the original sound is halved, so the volume is reduced. There is a problem of doing.

In view of the problems in the above-described conventional example, an object of the present invention is to appropriately use data such as effect balance data created by other electronic musical instruments without causing a decrease in volume. It is an object of the present invention to provide an effect imparting device capable of imparting an effect to.

[0009]

In order to achieve this object, the present invention is equipped with a plurality of effect applying means for applying an effect to an input original sound, and outputs from each of the plurality of effect applying means. In an effect imparting device that synthesizes and outputs the effect sound and the original sound,
Means for setting a volume level for each of the arbitrary effect imparting means including the plurality of effect imparting means, means for determining whether or not the effect imparting means for which the volume level is to be set is equipped, If the means for setting the volume level and the effect imparting means for which the volume level is to be set are not equipped, the volume level of the original sound is based on the volume level set for the effect imparting means not equipped. And a means for correcting.

Further, an effect imparting apparatus equipped with a plurality of effect imparting means for imparting an effect to the input original sound, and synthesizing and outputting the effect sound and the original sound output from each of the plurality of effect imparting means. In order to control the volume level of the original sound, the original sound level data for controlling the volume level of the original sound or the volume level of the effect sound by one effect applying means selected from any effect applying means including the plurality of effect applying means. Input means for inputting effect sound level data,
Equipped with a discrimination means for discriminating whether or not an effect imparting means for imparting the effect to the effect sound level data inputted by the input means is equipped, and an effect imparting means corresponding to the effect sound level data by the discriminating means. When it is determined that the effect sound level data has been determined, the effect sound level control means for controlling the volume level of the effect sound by the corresponding effect applying means based on the effect sound level data, and the corresponding effect applying means by the determining means. Storage means for storing effect sound level data determined not to be equipped with, and controlling the volume level of the original sound based on the original sound level data input by the input means,
When the effect sound level data of the effect imparting means not equipped is stored in the storage means, the original sound level data is corrected based on the effect sound level data stored in the storage means, An original sound level control means for controlling the volume level of the original sound according to the level data is provided.

[0011]

According to the present invention, the volume level can be set for each of the arbitrary effect imparting means regardless of whether or not the effect imparting means is installed in the own machine. Naturally, the setting of the volume level is significant for the effect applying means provided, but the setting of the volume level for the effect applying means not provided is meaningless. However, in the present invention, the volume level of the original sound is corrected based on the volume level set for the effect imparting means that is not equipped.

Therefore, even when the effect balance data (data including the volume level setting data for the effect providing means not provided) created by another electronic musical instrument is used, the volume level of the original sound is corrected as described above. Therefore, the effect can be properly added without causing a decrease in volume.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a block configuration of an electronic musical instrument to which an effect imparting apparatus according to an embodiment of the present invention is applied. This electronic musical instrument includes a MIDI interface 1, a CPU (central processing unit) 2, a ROM (read only memory) 3,
RAM (random access memory) 4, operation panel 5,
A tone synthesis circuit 6, an effect circuit 7, a sound system 8 and a bus line 9 are provided.

The MIDI interface 1 is a MIDI interface.
This is an interface for transmitting and receiving performance information to and from an external MIDI device according to the (Musical Instrument Digital Interface) standard. The CPU 2 controls the operation of the entire electronic musical instrument. CPU3 in ROM3
Stores programs executed by, and various control data. The RAM 4 is provided with working areas such as various registers and flags.

The operation panel 5 includes various operators for the user to operate. The tone synthesis circuit 6 generates a tone signal based on an instruction from the CPU 2. The effect circuit 7 inputs the musical tone signal output from the musical tone synthesis circuit 6 as an original sound, adds various effects, and outputs it. The sound system 8 emits a musical tone in accordance with the musical tone signal to which the effect has been added, which is output from the effect circuit 7. The bus line 9 is a bidirectional bus line that connects these units.

FIG. 2 shows a block configuration of the effect circuit 7. The effect circuit 7 of this embodiment includes a reverb circuit 11, a tremolo circuit 12, a chorus circuit 13, multipliers 21 to 24, and adders 31 to 33. Circuits for applying individual effects such as the reverb circuit 11 and the tremolo circuit 12 are collectively referred to as an effect applying circuit. The effect circuit 7 is provided independently for each MIDI channel, but may be shared by time division processing.

The original tone signal from the tone synthesis circuit 6 is
It is input to the four multipliers 21 to 24 and multiplied by a predetermined multiplier. The multiplier 21 is for adjusting the volume level of the original sound (dry sound) to which no effect is added. The multiplier 22 is for adjusting the volume level of the effect sound to which the reverb circuit 11 applies reverb. The multiplier 23 is for adjusting the volume level of the effect sound to which the tremolo circuit 12 adds tremolo. The multiplier 24 is for adjusting the volume level of the effect sound to which the chorus circuit 13 applies the chorus.

The dry sound and the effect sounds thus adjusted in volume level are added by the adders 31 to 33 and output to the sound system 8 as a final effect-added musical sound signal.

Next, an outline of the operation of the electronic musical instrument of this embodiment will be described.

This electronic musical instrument receives performance information from the outside via the MIDI interface 1. The received performance information is stored in a predetermined MIDI buffer.
The CPU 2 scans the MIDI buffer and, if there is data, performs processing according to the data.

For example, when note data (performance data including pitch data, key-on / off data, etc.) is received, the CPU 2 once writes the note data in the note buffer, and thereafter, the note synthesizing circuit 6 writes the note data. An instruction is given to generate a tone signal corresponding to the data. The tone synthesis circuit 6 generates a tone signal in response to an instruction from the CPU 2.

The multipliers of the multipliers 21 to 24, that is, the volume levels of the dry sound and each effect sound are also determined according to the effect data given from the outside.
That is, when the effect data is received from the outside, C
The PU 2 sets the volume level of the dry sound and each effect sound in the effect circuit 7 according to the effect data.

Here, among the effect data given from the outside, there are effects data not provided in this electronic musical instrument. For example, the effect circuits 11 to 13, the multipliers 21 to 24, and the adders 31 to 3 of FIG.
In addition to 3, a further effect circuit which is a celeste circuit 41 and a phasor circuit 42, multipliers 51 and 52,
In addition, other electronic musical instruments including the adders 61 to 63 may create effect data.

At this time, in the effect data,
The effect data for setting (adjusting) the volume level of the celeste or phasor effect sound is included, and the volume level of the dry sound is set assuming that the celeste or phasor effect sound is output. .

Therefore, the received effect data (effect data including volume level setting data for the celeste or phasor) is used as it is, and the dry circuit in the effect circuit 7 of the electronic musical instrument of this embodiment which does not include the celeste circuit or the phasor circuit is used. When the volume level of the sound and effect sound is set, the volume level of the dry sound becomes small, and the effect balance as a whole is lost.

Therefore, in the electronic musical instrument of this embodiment, it is possible to obtain a proper effect balance even when the effect data including the volume level setting data for the celeste or phasor which is not included in the own instrument is received. , The volume level is set as follows.

As effect data, "Bn + 5A
When “H + Vd” is received, “Bn” is a control change code, and each part of the electronic musical instrument can be controlled according to the subsequent 2-byte data. A MIDI channel number from OH to FH can be designated as "n".
Also, H indicates hexadecimal notation. In this way, the following effects can be specified for each MIDI channel. Therefore, each register is also MID
It is assumed that it is prepared for each I channel.

"5AH" is a code indicating that the following data is the dry send level Vd. The default value of the dry send level Vd is 7FH. However, the range of the level value is 00H to 7FH. "5 AH
When "+ Vd" is received, the CPU 2 corrects the dry send level Vd according to the level of the other effect sound set at that time, and sets the volume level of the dry sound according to the corrected value. .

Specifically, to the dry send level Vd,
Of the reverb, tremolo, chorus, celeste, and phasor, the equivalent volume of the send level of the effect (cereste and phasor in this embodiment) having no reception capability is added. That is, if the send level of an arbitrary effect having no reception capability is Ve, the total dry send level is calculated by the following equation.

[0031] ^{L = 20log {(Vd 4 +} ΣVe 4/16) 1/2 / 127 2} ... (1)

Here, L is the total dry sound volume level (dB), and ΣVe ⁴ is the sum of the power levels of the effects having no reception capability (that is, not equipped) multiplied by the fourth power. This dry level L
To the effect circuit 7, and the multiplier 2
Set a multiplier of 1.

However, when the total sound volume exceeds 0 dB, it is regarded as 0 dB. Also, (Vd ⁴ + ΣVe ⁴ /
16) When ^1/2 = 0, L = -∞ (volume zero). For the volume below the lower limit of the dynamic range of the dry send amount, the lower limit shall be substituted.

As effect data, "Bn + 5B
When "H + V" is received, "5BH" is a code indicating that the following data is the reverb send level V. When this effect data is received, the CPU 2 calculates the reverb level L by the following equation, sends the reverb level L to the effect circuit 7, and sets the multiplier of the multiplier 22 according to this value. ^{L = 20log (V 2/127} 2) ... (2)

Effects other than reverb, that is, tremolo, chorus, celeste, and phasor are set at the level calculated by the equation (2) as in the above. However, the code "5BH" is "5C"
"H", "5DH", "5EH" and "5FH".

Of course, when the effect data for the unequipped effect is received as described above and, the send level V of the received effect is stored (only for use as Ve). No settings are made to the effect circuit.

In the above and above, when V = 0, L = -∞ (volume zero). The volume level of the return sound of each effect is set so that when the send level value is maximum, the volume level is about -12 dB with respect to the dry sound. For the volume below the lower limit of the dynamic range of the send amount, the lower limit shall be substituted.

The default value of the send level V of each effect is 40H for the reverb and 00H for the other effects.

Next, the operation of the electronic musical instrument of this embodiment will be described in detail with reference to the flow charts of FIGS.

FIG. 3 shows the main routine of this electronic musical instrument. When the power source of this electronic musical instrument is turned on, first, initialization is performed in step S1. Next, step S
In step 2, MIDI interface processing is performed, in step S3, sound generation processing is performed, in step S4, panel processing is performed, and in step S5, other processing is performed. Then, it returns to step S2 and repeats the subsequent processes.

FIG. 4 shows the MIDI interface processing routine of step S2 of FIG. First, step S
In step 11, the MIDI buffer is scanned. The received data is stored in the MIDI buffer. In step 12, it is determined whether event data is stored in the MIDI buffer. When the event data is not stored, the process directly returns.

If the MIDI buffer stores event data in step S12, it is determined in step S13 whether or not the data is note data. If it is note data, the data is written in the note buffer in step S15 and the process returns. The note data written in the note buffer is sounded by the sound generation process of step S3 of FIG.

If it is not note data in step S13, it is determined in step S14 whether or not it is effect data. If it is effect data, effect processing is performed in step S16, and the process returns. If it is not effect data, other processing is performed in step S17 and the process returns.

FIG. 5 shows the effect processing routine of step S16 of FIG. In the routine below, each MID
The processing is performed independently for each I channel. First, in step S21, it is determined whether or not the effect data in the MIDI buffer is data instructing dry level setting (in the above case). If the data indicates the setting of the dry level, the dry level setting process is performed in step S22, and the process returns.

If it is not the data instructing the setting of the dry level in step S21, it is determined in step S23 whether or not the effect data is the data instructing the setting of the reverb level (in the above case). If the data is the data for instructing the reverb level setting, the reverb setting process is performed in step S24 and the process returns.

If the data does not instruct the setting of the reverb level in step S23, it is determined in step S25 whether or not the data instruct the setting of the tremolo level.
When the data is for instructing the tremolo level setting,
In step S26, the tremolo setting process is performed and the process returns.

If it is not the data for instructing the setting of the tremolo level in step S25, it is determined in step S27 whether or not the data is for instructing the setting of the chorus level.
If the data is for setting the chorus level,
In step S28, the chorus setting process is performed and the process returns.

If it is not the data instructing the setting of the chorus level in step S27, it is determined in step S29 whether it is the data instructing the setting of the celeste level.
When the data is to instruct the setting of Celeste level,
In step S30, the celeste setting process is performed and the process returns.

If the data does not indicate the setting of the celeste level in step S29, it is determined in step S31 whether or not the data indicates the setting of the phasor level.
If the data is for setting the phasor level,
A phasor setting process is performed in step S32, and the process returns. If the data does not instruct the setting of the phasor level in step 31, other effect processing is performed in step S33, and the process returns.

FIG. 6 shows the dry level setting processing routine of step S22 of FIG. First, step S41
Then, it is checked whether or not the own effect circuit 7 is equipped with reverb, tremolo, chorus, celeste, and phasor. Next, in step S42, the received dry send level data is set in the register Vd.

In step S43, the level of the effect not equipped is set in the register Vei.
In this embodiment, since the celeste and phasor are not equipped, the celeste level at the present time is set in the register Ve1 and the phasor level is set in the register Ve2.

Next, in step S44, L = 20log {(Vd 4 + ΣVei 4/16) 1/2 / 1
27 ² } is calculated. This is the calculation of the above formula (1). In this embodiment, ΣVei ⁴ becomes Ve1 ⁴ + Ve2 ⁴ .
When the total volume exceeds 0 dB, it is set to 0 dB.

Next, in step S45, the above L is set to the dry level and sent to the effect circuit 7. As a result, the multiplier of the multiplier 21 is set according to the dry level L. After step S45, the process returns.

FIG. 7 shows the reverb setting processing routine of step S24 of FIG. First, in step S51, the received reverb send level data is set in the register V. Next, in step S52, the send level V
Is stored as a reverb level in a predetermined register. Here, the reverb level is stored because it is used as the level of the effect that is not provided in step S43 of FIG. 6 described above, when the reverb is not provided in the effect circuit of the own device.

Next, in step S53, it is determined whether or not the effect circuit 7 of the own machine is equipped with reverb. If the reverb is not equipped, return as it is. When reverberation is equipped computes ^{L = 20log (V 2/127} 2) in step S54.
This is the calculation of the above formula (2).

Then, in step S54, the calculation result L is sent to the effect circuit 7 as a reverb level. As a result, the multiplier of the multiplier 22 is set according to the reverb level L. It returns after step S55.

The tremolo setting process of step S26, the chorus setting process of step S28, and the step S3 of FIG.
The Celeste setting process of 0 and the phasor setting process of step S32 are the same as the reverb setting process of FIG. 7 described above. That is, the send level of each effect received is set in the register V, stored in a predetermined register and stored, and it is further determined whether or not the own machine is equipped with each effect such as a tremolo. As in steps S54 and S55, the level L is calculated by the equation (2) and sent to the effect circuit 7 as the level of each effect.

In this embodiment, since the celeste and the phasor are not provided, the processes corresponding to steps S54 and S55 are not executed in the celeste setting process of step S30 and the phasor setting process of step S32.

According to the above-described embodiment, the level of the dry sound is corrected according to the expression (1) based on the level data for the Celeste and the phasor not equipped, so that the volume is not reduced. Proper effect balance is achieved.

In the above embodiment, the level of the effect that is not equipped is stored (step S5).
2) Used when setting the dry level (step S
43), it is necessary to receive the level data of each effect prior to the reception of the dry level, but this need not be the case. For example, if the dry level correction process (steps S44 and S45) is performed as necessary at the end of each effect setting process (reverb setting process, etc.), the reception order may be arbitrary.

Further, in the above embodiment, a multiplier is provided on the input side of each effect applying circuit to control the volume level of each effect, but the output level of the effect may be controlled, or each effect may be controlled. The volume level may be controlled inside the applying circuit.

The type of effect is not limited to that of the embodiment, and a general filter or the like may be used. In the embodiment, the effect is applied to the entire output of the tone synthesis circuit 6, but, for example, a different effect may be specified for a specific MIDI channel or a specific tone color.

[0063]

As described above, according to the present invention, the volume level of the original sound is corrected on the basis of the set volume level of the effect imparting circuit that is not provided, which causes a decrease in volume. Instead, the effect is achieved with the proper effect balance.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of an electronic musical instrument to which an effect imparting device according to an embodiment of the present invention is applied.

FIG. 2 is a block diagram of an effect circuit.

FIG. 3 is a flowchart showing a main routine of the electronic musical instrument of the embodiment.

FIG. 4 is a flowchart of a MIDI interface processing routine.

FIG. 5 is a flowchart of an effect processing routine.

FIG. 6 is a flowchart of a dry level setting routine.

FIG. 7 is a flowchart of a reverb setting processing routine.

[Explanation of symbols]

1 ... MIDI interface, 2 ... CPU (central processing unit), 3 ... ROM (read only memory), 4 ... R
AM (random access memory), 5 ... Operation panel, 6
... Sound synthesis circuit, 7 ... Effect circuit, 8 ... Sound system, 9 ... Bass line, 11 ... Reverb circuit, 12 ...
Tremolo circuit, 13 ... Chorus circuit, 21-24 ... Multiplier, 31-33 ... Adder, 41 ... Celeste circuit, 42 ...
Phaser circuits, 51, 52 ... Multipliers, 61-63 ... Adders.

Claims (2)

[Claims] 1. An effect imparting apparatus comprising a plurality of effect imparting means for imparting an effect to an input original sound, and synthesizing an effect sound output from each of the plurality of effect imparting means and an original sound and outputting the synthesized sound. And a means for setting a volume level for each of the arbitrary effect applying means including the plurality of effect applying means, a means for determining whether or not the effect applying means for which the volume level is to be set is equipped, If the means for setting the volume level of the original sound and the effect applying means for which the volume level is to be set are not equipped, the above-mentioned original sound of the original sound is set based on the volume level set for the effect applying means not equipped. An effect imparting device, comprising: means for correcting a volume level. 2. An effect imparting device equipped with a plurality of effect imparting means for imparting an effect to an input original sound, and synthesizing and outputting an effect sound and an original sound output from each of the plurality of effect imparting means. In order to control the volume level of the original sound, the original sound level data for controlling the volume level of the original sound, or the volume level of the effect sound by one effect applying means selected from any effect applying means including the plurality of effect applying means. The input means for inputting the effect sound level data, the judging means for judging whether or not the effect adding means for adding the effect to the effect sound level data inputted by the input means is provided, and the judging means Equipped with effect adding means corresponding to sound level data When it is determined that the effect sound level data is present, the effect sound level control means for controlling the volume level of the effect sound by the corresponding effect applying means based on the effect sound level data, and the corresponding effect applying means by the determining means. Storage means for storing the effect sound level data determined not to be equipped with, and controlling the volume level of the original sound based on the original sound level data input by the input means, and the effect of the effect providing means not equipped. When the sound level data is stored in the storage means, the original sound level data is corrected based on the effect sound level data stored in the storage means, and the volume level of the original sound is controlled by the corrected level data. And an original sound level control means Applicator.