JP2746057B2 - Effect giving device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art Conventionally, there has been known a technique of adding various effects (effects) such as reverb or tremolo to a tone signal, synthesizing and outputting the resultant signal. For example, Japanese Unexamined Patent Publication
No. 126091 discloses an original sound (so-called dry sound)
There is disclosed an effect adding device for multiplying a tone signal obtained by applying an effect to a predetermined level value, adding the result to the original sound, and outputting the resultant signal. As a result, it is possible to control the degree of the effect only by adjusting the level value by which the effected tone signal is multiplied.

Similarly, a plurality of effect circuits for applying effects are provided, and the original sound is inputted to the plurality of effect circuits to apply the respective effects, and the output from each effect circuit and the original sound are compared. There is also a technique of combining and outputting.

In this case, the level of the input or output of each effect circuit is controlled, the level of the original sound is controlled, and the tone signals whose levels have been controlled are synthesized (added) to obtain a final tone signal. The effect balance is determined by how much the level of the original sound and the level of each effect circuit are controlled.

[0005]

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

However, there are cases where the effect circuit provided in the first electronic musical instrument is not provided in the second electronic musical instrument. In this case, the effect balance data originally created as if there is the effect circuit is
Since it is used in an electronic musical instrument without the effect circuit, there is a problem that the sound volume is reduced.

For example, the level of the original sound is set to 1/2, the level of the output obtained by adding reverb to the original sound is set to 1/2, and the data of the effect balance of the electronic musical instrument to be added and output is provided with a reverb circuit as it is. When used for an electronic musical instrument that does not have a reverb circuit, it is natural that reverb cannot be applied because it does not originally have a reverb circuit, but in addition, the level of the original sound is reduced by half, so that the volume is reduced. Problem occurs.

SUMMARY OF THE INVENTION In view of the above-mentioned problems in the prior art, the present invention does not cause a decrease in sound volume even when utilizing data such as an effect balance created by another electronic musical instrument. It is an object of the present invention to provide an effect imparting device capable of imparting an effect to an image.

[0009]

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

[0010] Further, the apparatus is provided with a plurality of effect applying means for applying an effect to the input original sound, and synthesizes and outputs the effect sound and the original sound output from each of the plurality of effect applying means. In the above, the original sound level data for controlling the volume level of the original sound, or the sound level data for controlling the volume level of the effect sound by one effect applying means selected from arbitrary effect applying means including the plurality of effect applying means. Input means for inputting effect sound level data,
A discriminating means for discriminating whether or not an effect imparting means for imparting the effect to the effect sound level data input by the input means is provided, and an effect imparting means corresponding to the effect sound level data is provided by the discriminating means. When it is determined that the effect sound level has been applied, 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; Storage means for storing the effect sound level data determined not to be equipped, 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 non-equipped effect applying means 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 corrected Original sound level control means for controlling the volume level of the original sound based on the level data.

[0011]

According to the present invention, the volume level can be set for each of the optional effect applying means regardless of whether the effect applying means is provided in the own device. Naturally, the setting of the sound volume level is meaningful for the equipped effect applying means, but the setting of the sound volume level for the effect providing means not equipped is meaningless. However, according to the present invention, the volume level of the original sound is corrected based on the volume level set for the effect providing means that is not equipped.

Therefore, even when effect balance data (data including volume level setting data for an unprovided effect applying unit) created by another electronic musical instrument or the like is used, the volume level of the original sound is corrected as described above. Therefore, the effect can be appropriately given without reducing the volume.

[0013]

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

FIG. 1 shows a block diagram of an electronic musical instrument to which an effect imparting device according to one embodiment of the present invention is applied. The 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.
(Musical Instrument Digital Interface) This is an interface for transmitting and receiving performance information to and from an external MIDI device according to the standard. The CPU 2 controls the operation of the entire electronic musical instrument. The ROM 3 contains the CPU 2
And various control data are stored. 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 receives the tone signal output from the tone synthesis circuit 6 as an original sound, adds various effects, and outputs the resulting signal. 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 connecting 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 effect applying circuits. 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
The signals are input to the four multipliers 21 to 24 and are respectively multiplied by a predetermined multiplier. The multiplier 21 adjusts the volume level of the original sound (dry sound) to which no effect is applied. The multiplier 22 adjusts the volume level of the effect sound to which reverb is applied by the reverb circuit 11. The multiplier 23 adjusts the volume level of the effect sound to which the tremolo is applied by the tremolo circuit 12. The multiplier 24 adjusts the volume level of the effect sound to which the chorus is applied by the chorus circuit 13.

The dry sound and the effect sounds whose volume levels have been adjusted in this way are added by adders 31 to 33 and output to the sound system 8 as a final effect-applied 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 a process according to the data.

For example, when note data (performance data including pitch data, key on / off data, etc.) is received, the CPU 2 writes the note data into a note buffer, and then sends the note data to the tone synthesis circuit 6. An instruction is given to generate a tone signal according 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 effect data is received from 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, some of the effect data provided from the outside may be for effects not provided in the electronic musical instrument. For example, the effect circuits 11 to 13, the multipliers 21 to 24, and the adders 31 to 3 in FIG.
3. In addition to the above, further effect circuits such as a celeste circuit 41 and a phasor circuit 42, multipliers 51 and 52,
In some cases, other electronic musical instruments including the adders 61 to 63 may create effect data.

At this time, in the effect data,
In addition to the effect data for setting (adjusting) the volume level of the celeste or phasor effect sound, the volume level of the dry sound is set on the assumption that the celeste or phasor effect sound is output. .

Accordingly, the received effect data (effect data including volume level setting data for the celeste and phasor) is used as it is, and the effect data of the effect circuit 7 of the electronic musical instrument according to the present embodiment, which does not include the celeste circuit or the phasor circuit, is used. When the volume levels of the sound and the effect sound are set, the volume level of the dry sound becomes lower, and the effect balance as a whole is lost.

Therefore, in the electronic musical instrument of this embodiment, an appropriate effect balance can be obtained even when effect data including volume level setting data for a celeste or a phasor not provided in the electronic musical 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 bytes of data. "N" can designate a MIDI channel number from OH to FH.
H indicates hexadecimal notation. Thus, 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 subsequent data is at 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. "5AH
When “+ Vd” is received, the CPU 2 corrects the dry send level Vd according to the level of another effect sound set at that time, and sets the volume level of the dry sound according to the corrected value. .

Specifically, the dry send level Vd is
The reverb, tremolo, chorus, celeste, and phasor are added together with the corresponding volume of the send level of the effect having no receiving ability (celeste and phasor in this embodiment). That is, assuming that the send level of any effect having no receiving ability 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 volume level (dB), and ΔVe ⁴ is the sum of the fourth power of each send level of the effect having no reception capability (that is, not equipped). This dry level L
To the effect circuit 7, and the multiplier 2
Set a multiplier of 1.

However, if the total volume exceeds 0 dB, it is assumed that the total volume is 0 dB. Also, (Vd ⁴ + ΣVe ⁴ /
16) When ^1/2 = 0, L = -∞ (volume is zero). For a sound volume equal to or lower than the lower limit of the dynamic range of the dry send amount, the lower limit is substituted.

As effect data, “Bn + 5B
When “H + V” is received “5BH” is a code indicating that the subsequent 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) in the same manner as described above. However, code “5BH” is “5C
H, 5DH, 5EH, and 5FH.

Of course, when the effect data for the effect that is not equipped is received as described above, the send level V of the received effect is only stored (storage for use as Ve), and No settings are made to the effect circuit.

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

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

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

FIG. 3 shows a main routine of the electronic musical instrument. When the power of the electronic musical instrument is turned on, first, in step S1, initialization is performed. Next, step S
2, a MIDI interface process is performed, a sound generation process is performed in step S3, a panel process is performed in step S4, and other processes are performed in step S5. Thereafter, the process returns to step S2, and the subsequent processing is repeated.

FIG. 4 shows a MIDI interface processing routine of step S2 in FIG. First, step S
In step 11, the MIDI buffer is scanned. The received data is stored in a MIDI buffer. At step 12, it is determined whether or not event data is stored in the MIDI buffer. If no event data is stored, the process returns.

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

If the data is not note data in step S13, it is determined in step S14 whether the data is effect data. If the data 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 in FIG. In the following routine, each MID
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 the setting of the dry level (in the above case). If the data is for instructing the setting of the dry level, a 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 for instructing reverb level setting, reverb setting processing is performed in step S24, and the process returns.

If the data is not data instructing the setting of the reverb level in step S23, it is determined in step S25 whether the data is data instructing the setting of the tremolo level.
If the data indicates the setting of the tremolo level,
A tremolo setting process is performed in step S26, and the process returns.

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

If the data is not data instructing the setting of the chorus level in step S27, it is determined in step S29 whether the data is data instructing the setting of the celeste level.
If the data indicates the setting of the celeste level,
A celeste setting process is performed in step S30, and the process returns.

If the data is not data instructing the setting of the celeste level in step S29, it is determined in step S31 whether the data is data instructing the setting of the phasor level.
If the data indicates the setting of the phasor level,
In step S32, a phasor setting process is performed, and the process returns. If it is not the data instructing the setting of the phasor level in step 31, other effect processing is performed in step S33, and the process returns.

FIG. 6 shows a dry level setting processing routine in step S22 in FIG. First, step S41
Then, it is checked whether or not the effect circuit 7 of the own device 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 provided is set in the register Vei.
In this embodiment, since the celeste and the phasor are not provided, the celeste level and the phasor level at the present time are set in the register Ve1 and the register Ve2, respectively.

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

Next, in step S45, L is sent to the effect circuit 7 as a dry level. 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 a reverb setting processing routine of step S24 in 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 reason why the reverb level is stored is that if the reverb is not provided in the effect circuit of the own device, it is used as the level of the effect not provided in step S43 of FIG.

Next, in step S53, it is determined whether or not the effect circuit 7 of the own device is equipped with a reverb. If no reverb is equipped, return as is. When reverberation is equipped computes ^{L = 20log (V 2/127} 2) in step S54.
This is the calculation of the above equation (2).

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. After step S55, the process returns.

The tremolo setting process of step S26 in FIG. 5, the chorus setting process of step S28, and step S3
The celeste setting process of 0 and the phasor setting process of step S32 are similar to the reverb setting process of FIG. 7 described above. That is, the send level of each received effect is set in the register V, stored and held in a predetermined register, and it is determined whether or not the own device 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 in step S30 and the phasor setting process in step S32.

According to the above embodiment, the level of the dry sound is corrected as shown in the equation (1) based on the level data for the celeste or phasor not equipped, so that the volume does not decrease. Appropriate effect balance is achieved.

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

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. However, the output level of each effect may be controlled. The volume level may be controlled inside the application circuit.

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

[0063]

As described above, according to the present invention, since the volume level of the original sound is corrected based on the volume level set in the effect-providing circuit that is not provided, the volume is reduced. Effect is achieved with an appropriate effect balance.

[Brief description of the drawings]

FIG. 1 is a block diagram of an electronic musical instrument to which an effect applying 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 processing 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
... tone synthesis circuit, 7 ... effect circuit, 8 ... sound system, 9 ... bus line, 11 ... reverb circuit, 12 ...
Tremolo circuit, 13 chorus circuit, 21 to 24 multiplier, 31 to 33 adder, 41 celeste circuit, 42
Phasor circuits, 51, 52 ... multipliers, 61 to 63 ... adders.

Claims (2)

(57) [Claims] 1. An effect applying device comprising a plurality of effect applying means for applying an effect to an input original sound, and combining and outputting an effect sound output from each of the plurality of effect applying means and the original sound. 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 an effect applying means for which a volume level is to be set is provided; 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 provided, based on the volume level set for the non-equipped effect applying means, Means for correcting the volume level. 2. An effect applying apparatus comprising a plurality of effect applying means for applying an effect to an input original sound, and synthesizing and outputting an effect sound output from each of the plurality of effect applying means and an original sound. In the above, 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 arbitrary effect applying means including the plurality of effect applying means. Input means for inputting effect sound level data; determining means for determining whether or not effect applying means for applying the effect to the effect sound level data input by the input means is provided; Equipped with effect adding means corresponding to sound level data If it is determined that the sound effect level has been obtained, 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; Storage means for storing effect sound level data determined not to be equipped, 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 provided 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. Characterized in that the original sound level control means is provided. Applicator.