JP3334808B2 - 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 electronic musical instrument, and more particularly to an electronic musical instrument having a function of providing a panning effect.

[0002]

2. Description of the Related Art Conventionally, electronic musical instruments incorporating a stereo panpot for localizing or moving a sound image in a sound field have been used. As shown in FIG. 11, a stereo pan pot used in such an electronic musical instrument converts a tone signal input from an input terminal 101 through interlocking variable resistors 102 and 103 having cosine and sine characteristics, respectively. L
The output is provided from the output terminals 104 and 105 of the R channel and the R channel.
If the phase angle set by 02 and 103 is θ,
The output signal level of the L channel is L = cos θ × (input signal level), and the output signal level of the R channel is R = sin θ × (input signal level). The output signal levels of these two channels are as shown in FIG.
The output level at the center position where the phase angle is 45 ° is 3 dB lower than the output level at the left and right end positions. Since the sound output is proportional to the square of the left and right sound pressure levels, assuming that the sound output is P (θ), P (θ) = a × ｛cos ² θ × (input signal level) ²
+ Sin ² θ × (input signal level) ² ｝ = a × (input signal level) ² : a = proportional constant and becomes constant regardless of the phase angle θ. Therefore, the panning curve representing the position where the sound image is localized in this conventional stereo panpot has a fan shape centered on the listener H, as shown in FIG. Will keep the level.

[0003]

However, when an attempt is made to localize a sound image freely using an electronic musical instrument provided with such a conventional stereo panpot, the movement of the sound image that can be localized by the stereo panpot is monotonous. Therefore, there is a disadvantage that the creative desire of the electronic musical instrument player cannot be sufficiently satisfied.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a drawback of a conventional electronic musical instrument having a stereo pan pot, and an effect imparting apparatus which enables various sound image localizations and obtains various panning effects. The purpose is to provide.

[0005]

In order to achieve the above object, an effect applying apparatus according to the present invention is characterized in that at least one panning characteristic is selected from a plurality of panning characteristics for performing sound image localization on different moving paths. Choose and time
Switch the selected panning characteristics according to the elapsed time
And panning characteristic selection means for outputting Te, and panning data supply means for supplying a panning data to specify the panning position, the panning data supplied by the panning data supply means, corresponding to the switched <br/> panning characteristics Volume balance data creating means for creating volume balance data to be performed, and a panning effect is given to a musical tone input on a movement path of a sound image corresponding to the panning characteristic by the volume balance data created by the volume balance data creation means. And a panning effect imparting means. Effect imparting apparatus according to claim 2, selects at least one panning characteristic from among a plurality of panning characteristic having a different respective as sound pressure changes characteristic corresponding to the panning position
Together with the selected panning characteristics over time.
And panning characteristic selecting means for switching output, and panning data supply means for supplying a panning data to specify the panning position, the panning data supplied by the panning data supply means, said cutting conversion
Volume balance data creating means for creating volume balance data corresponding to the obtained panning characteristics, and panning effect imparting means for imparting a panning effect to an input musical tone with the volume balance data created by the volume balance data creating means Wherein a sound pressure change corresponding to a panning position corresponding to the panning characteristic is generated. The effect imparting device according to claim 3 includes at least one of a plurality of panning characteristics.
And panning characteristic output means for selectively outputting the number of panning characteristics, and panning data supply means for supplying Banning data specifying the panning position, the panning data supplied by the panning data supply means
A panning characteristic switching unit that divides the panning characteristics into a plurality of sections and switches the output panning characteristic for each section, and corresponds to the switched panning characteristic according to panning data supplied by the panning data supply unit. Volume balance data creating means for creating volume balance data; and panning effect imparting means for imparting a panning effect to the input musical tone by the volume balance data created by the volume balance data creating means. I do.

[0006]

[Action] effect imparting apparatus according to claim 1, When selected co at least one panning characteristic from among a plurality of panning characteristics for performing a sound image localization at a different path respectively
Cuts the selected panning characteristics over time.
Instead , the panning effect is applied to the musical sound input on the moving path of the sound image corresponding to the panning characteristic, so that the setting of the panning characteristic for performing the sound image localization on the different moving paths can be changed over time. Thus, various panning effects different from conventional panning effects can be obtained. The effect imparting device according to claim 2, wherein at least one panning characteristic is selected from a plurality of panning characteristics having different sound pressure change characteristics corresponding to the panning positions, and time is selected.
The selected panning characteristics are switched and output according to the progress, and a panning effect is applied on the moving path of the sound image according to the sound pressure level based on the panning characteristics. Thus, it is possible to set a panning characteristic for performing sound image localization based on a sound pressure change characteristic corresponding to the time , and various panning effects different from the conventional panning effect can be obtained. The effect imparting device according to claim 3 divides the panning data supplied by the panning data supply unit into a plurality of sections.
Since the divided panning characteristics are switched for each section and a panning effect is applied to the musical tone based on the switched panning characteristics, the panning characteristics for performing sound image localization on different moving paths are set. Becomes possible for each section of the divided panning data, and various panning effects different from conventional panning effects can be obtained.

[0007]

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

FIG. 2 is a block diagram showing a circuit configuration of the first embodiment of the present invention.

In FIG. 2, a panning table selecting section 11 corresponds to the panning characteristic selecting means 1 of FIG. 1, and includes a plurality of panning tables for setting various tone signal levels corresponding to phase angles for determining a panning position. …
, And outputs the weighting data according to the characteristics of the selected panning table to the panning table reference unit 13.

The panning data setting section 12 corresponds to the panning data supply means 2 in FIG. 1, and has a setting knob 12 'for setting a panning position. The setting knob 12'
Is input to the panning table reference unit 13 corresponding to the panning position set by the above. The panning table reference unit 13 corresponds to the volume balance data creating unit 3 in FIG.
The weighting data corresponding to the phase angle data θ input from the panning data setting unit 12 is read out from the panning table selected in the step 1 and the panning effect imparting unit 1
4 is output.

Here, the panning table is, for example,
This is shown in FIGS. 5 to 8 described later.

The panning effect imparting section 14 corresponds to the panning effect imparting means 4 in FIG. 1 and imparts a panning effect to the musical sound data supplied from the musical sound signal supplying section 15 and outputs the data to the sound system 16.

The tone signal supply section 15 generates various tone signals by operating an operator's keyboard, foot pedal, or the like, and inputs the generated tone signals to the panning effect applying section 14.

The sound system 16 includes a D / A converter,
A panning effect imparting unit 1 including an amplifier circuit and a speaker
The digital tone data output from 4 is converted into an analog value and reproduced as an audio signal to create a sound field.

In this embodiment, the operator selects an appropriate panning table by operating the panning table selector 11 and operates the setting knob 12 'of the panning data setting unit 12 to correspond to the panning position where the sound image is localized. When the phase angle θ is input, the panning table reference unit 13 reads weighting data corresponding to the input phase angle θ of the selected panning table,
The sound is supplied to the panning effect imparting section 14, the tone is supplied from the musical sound signal supplying section 15, and the sound field is created by the sound system 16 to create a sound image at the set panning position. To be localized.

FIG. 3 is a block diagram showing the configuration of the second embodiment of the present invention.

In FIG. 3, multipliers 22 and 23 constituting the panning effect imparting means 4 shown in FIG. 1 are provided on the output side of a tone signal supply device 21 having a keyboard and a foot pedal for generating and outputting tone data. They are connected in parallel.
The output terminal of the multiplier 22 is connected to an R-channel speaker drive circuit, and the output terminal of the multiplier 23 is connected to an L-channel speaker drive circuit.

On the other hand, a phase angle generator 24 for outputting a 5-bit digital signal indicating the phase angle is provided.
The 5-bit digital value is repeatedly output from all bits “0” to all bits “1” at predetermined time intervals. The 5-bit phase angle data θ output from the phase angle generator 24 is input to a low frequency oscillator (hereinafter abbreviated as “LFO”) 25. The upper two bits of the 5-bit phase angle data θ output from the phase angle generator 24 are connected to two input terminals of an exclusive OR circuit (hereinafter abbreviated as “EX-OR circuit”) 26. Each is entered.

As shown in FIG. 4, the LFO 25 simply adds 0.125 according to the input phase angle data θ until the phase angle data θ becomes 1 (section I), and from 1 to −
Until 1 (section II and section III), 0.125 is simply subtracted, and from -1 to 1 (section IV), data x is obtained by simply adding 0.125 again.

The phase angle generator 24 and the LFO 25 are shown in FIG.
Of the panning data supply means 2 of FIG.

The output terminals of the LFO 25 are shown in FIGS.
The panning tables T ₀ (x) 27 and T ₀ (−x) shown in FIG.
28, T ₁ (x) 29 and input terminals of T ₁ (−x) 30 are connected. Panning table T ₀ (x) 27, T ₀
(−x) 28, T ₁ (x) 29 and T ₁ (−x) 30 are function generators that output weighting data as shown in FIGS. 5 and 6 for the data x.

The panning table T ₀ (x) 27, T
₀ (−x) 28, T ₁ (x) 29, T ₁ (−x) 30 are
This constitutes the panning characteristic selection means 1 shown in FIG.

The output terminal of the panning table T ₀ (x) 27 is connected to the A input terminal of the selector 31, and the output terminal of the panning table T ₁ (x) 29 is connected to the B input terminal of the selector 31. The selection signal input terminal S of the selector 31 is connected to the output terminal of the EX-OR circuit 26.

The output terminal of the panning table T ₀ (−x) 28 is connected to the A input terminal of the selector 32, and the output terminal of the panning table T ₁ (−x) 30 is the selector 3
2 B input terminals. The selection signal input terminal S of the selector 32 is connected to the output terminal of the EX-OR circuit 26.

When a signal of logic level "0" is applied to the selection signal input terminal S, the selectors 31 and 32 output the data applied to the A input terminal from the output terminal Y, and output the logic to the selection signal input terminal S. When a signal of level “1” is applied, B
The data applied to the input terminal is output from the output terminal Y.

The output terminals Y of the selectors 31 and 32 are connected to the input terminals of the multipliers 22 and 23, respectively.

The selectors 31 and 32 constitute the volume balance data creating means 3 shown in FIG.

Next, the operation of this embodiment will be described.

Since the phase angle generator 24 outputs 5-bit phase angle data θ which increases at a predetermined cycle and returns to the original state, the data x as shown in FIG. Is output to

First, the upper 2 bits of the phase angle data θ are 0
In the section I of FIG. 4, the output level of the EX-OR circuit 26 is at the logical level “0”.
2 outputs the data applied to the A input terminal. Therefore, in the section I, the panning table T ₀ (x) 27,
T ₀ (−x) 28 is selected and input to the multipliers 22 and 23, respectively. At this time, since the data x output from the LFO 25 increases from 0 to 1, the value of the weighting data of the panning table T ₀ (x) 27 is 0.5 to 1
And the value of the weighting data of the panning table T ₀ (−x) 28 decreases from 0.5 to 1. Therefore, the output sound pressure level of the R channel increases from the median value to the maximum value, and the output sound pressure level of the L channel decreases from the median value to 0. From this, the sound image moves from the front position of the listener H to the right end, as shown in the center diagram of FIG.

Next, in the sections II and III in FIG. 4 where the sum of the upper two bits of the phase angle data θ is 1, the EX-OR
Since the output level of the circuit 26 is a logical level "1",
The selectors 31, 32 output the signal applied to the B input terminal. Therefore, in sections II and III, panning tables T ₁ (x) 29 and T ₁ (−x) 30 are selected and input to multipliers 22 and 23, respectively. Then L
The data x output from the FO 25 decreases from 1 to -1. In the section II in which the data x decreases from 1 to 0, the value of the weighting data of the panning table T ₁ (x) is 1
, And the value of the weighting data of the panning table T ₁ (−x) increases from 0 to 1. Therefore, the output sound pressure level of the R channel is kept at the maximum value,
The output sound pressure level of the L channel increases from 0 to the maximum value. As a result, the sound image gradually moves from the right end position to the front position of the listener H, as shown in the center diagram of FIG. In the section III where the data x decreases from 0 to -1,
The value of the weighting data of the panning table T ₁ (x) decreases from 1 to 0, and the panning table T ₁ (−x)
Is held at the value of 1. Therefore, the output sound pressure level of the R channel decreases from the maximum value to 0, and the output sound pressure level of the L channel is kept at the maximum value. As a result, the sound image gradually moves from the front position of the listener H to the left end position as shown in the center diagram of FIG.

In the section IV of FIG. 4, the exclusive OR of the upper two bits of the phase angle data θ is 0, and the EX-OR circuit 2
Since the output signal of No. 6 has the logic level "0", the selectors 31 and 32 again output the data applied to the A input terminal. Therefore, in section IV, panning table T ₀
(X) 27 and T ₀ (−x) 28 are selected and the multiplier 2
2 and 23, respectively. At this time, since the data x output from the LFO 25 increases from -1 to 0,
The value of the weighting data of the panning table T ₀ (x) 27 increases from 0 to 0.5, panning table T ₀
The value of the (-x) 28 weighting data decreases from 1 to 0.5. Therefore, the output sound pressure level of the R channel increases from 0 to the median value, and the output sound pressure level of the L channel decreases from the maximum value to the median value. From this,
As shown in the center diagram of FIG. 5, the sound image moves from the left end position of the listener H to the front position.

Thus, in this embodiment, the sound image is
As shown in the center diagrams of FIGS. 5 and 6, the listener H rotates clockwise in front of the listener H with the passage of time, and repeats this at a predetermined cycle. By operating a keyboard or the like and generating arbitrary musical sound data, the performer can obtain musical sounds whose sound image positions automatically change as the performance progresses. Moreover, in the present embodiment, panning table _{T 0 (x) 27, T} 0 (-x) 28 is 1 2
Since having a linear characteristic relative to the phase angle θ as compared with the cosine characteristic, sinusoidal characteristics, such as conventional panning table shown in, localization point of the sound image becomes a point far than the point of fan-shaped FIG 3, so that the drawing an arc circuitous than the conventional example of FIG 3. In FIG. 5, the panning table T ₀
(X) 27 and T ₀ (−x) 28 are shown as characteristics with respect to the output voltage x of the LFO 25. The input / output characteristics of the LFO 25 are linear in a predetermined range with respect to the phase angle θ as shown in FIG. since it is, in terms of localization distance to the listener H of the sound image can be compared to the FIG. 1 2 and 5 directly. Also,
Panning tables T ₁ (x) 29, T ₁ (−x) 30
, Since has become a cosine characteristics, characteristics such as the sound pressure level is increased relative to the value of each phase angle θ as compared with sinusoidal characteristics, such as conventional panning table shown in FIG. 1 2, localization points of the sound image Is closer to the listener than in the conventional example. Thus, a panning characteristic different from the conventional panning characteristic can be realized.

The panning table T ₀ (x) 2
7, T ₀ (−x) 28, panning tables T ₀ (x), T ₀ of function characteristics of even powers of x as shown in FIG.
If (−x) is used, the localization of the sound image is determined by a panning table T ₀ (x) 27, T ₀ (−
x) Localization more detour than 28 is possible.

The panning table T ₀ (x) 2
7, instead of T ₀ (−x) 28, x as shown in FIG.
FIG. 9 shows a panning table T ₀ (x), T ₀ (−x), panning tables T ₁ (x) 29 and T ₁ (−x) 30 having the same characteristics symmetrical to the left and right with 0 as the center. And panning tables T ₁ (x) and T ₁ (−x) having the same characteristics symmetrical about x = 0 as well.
Is used, a tone with the same sound pressure level is reproduced from the left and right speakers, and the sound pressure level differs depending on the data x output from the LFO 25. Therefore, the sound image moves in the front-back direction at the front position of the listener H. It will be.

The input / output characteristics of the LFO 25 are not limited to the triangular wave shape shown in FIG. A waveform having a complicated shape may be used. By doing so, various sound image localizations that even the player of the electronic musical instrument cannot expect can be obtained.

An operation knob is provided on the LFO 25,
The speed at which the output waveform changes may be adjustable. This makes it possible to change the moving speed of the sound image.

The output of the phase angle generator 24 is not limited to 5 bits, but may be more or less. When the number is large, the number of sound image localization positions can be increased, and fine sound image localization can be performed.

The current sound image fixed position may be displayed on the display 33 as shown in FIGS. In this case, a predetermined performance is performed based on the outputs of the selectors 31 and 32 to determine the sound image fixed position. As a result, the operator can recognize the current sound image fixed position, and can perform a performance according to this position.

FIG. 10 is a block diagram showing a circuit configuration of the third embodiment of the present invention.

In FIG. 10, the same components as those of the second embodiment of FIG. 3 are denoted by the same reference numerals as those of FIG. 3, and the description thereof will be omitted.

In this embodiment, the phase angle data θ output from the phase angle generator 24 is also input to the counter 34. The output level of the counter 34 changes to the logical level “0” and the logical level “1” every time the phase angle data θ changes to 1111 and returns to 0000.
That is, the output level of the counter 34 alternately takes the values of the logical level “0” and the logical level “1” for each cycle of the data x output from the LFO 25.

The output terminal of the counter 34 is connected to the selector 3
5, 36 are connected to the selection signal input terminals S, and the A input terminal of the selector 35 and the B input terminal of the selector 36 are connected to the output terminal Y of the selector 31. The B input terminal of the selector 35 and the A input terminal of the selector 36 are connected to the output terminal Y of the selector 32. Further, the output terminal Y of the selector 35 is connected to the input terminal of the multiplier 22, and the output terminal of the selector 36 is connected to the input terminal of the multiplier 23.

The counter 34 and the selectors 35 and 36, together with the selectors 31 and 32, constitute the volume balance data creating means 1 of FIG.

Since the present embodiment has the above configuration, the panning tables T ₀ (x) 27, T ₀ (−x) 28 and T ₁ (x) 29,
The weighting by T ₁ (−x) 30 is alternately added to the R channel and the L channel.
Therefore, the rotation direction of the sound image is reversed every cycle of the LFO 25, and the richness of the sound image localization increases.

In the above embodiment, the panning tables T ₀ (x) 27, T ₀ (−x) 28 and T ₁ (x) 2
9, T ₁ (−x) 30 are symmetrical to each other, but may be asymmetrical to create a richer sound field.

The application of the panning characteristics may be performed by using a panning table as in the above embodiment. Alternatively, various panning characteristics data may be stored in a memory, and the data may be read out and weighted. Alternatively, a panning characteristic data assignment program may be created, and the panning characteristic data may be obtained by real-time calculation.

The selection of the panning table may be performed by operating an operation switch, or the number of the panning table may be stored in a memory as one of the timbre data, and different panning characteristics may be provided depending on the timbre. good. By doing so, a richer sound image localization can be obtained.

Further, the panning characteristics of the panning table may be freely edited by the player.

[0050]

According to the effect imparting device of the first aspect, at least one panning characteristic is selected from a plurality of panning characteristics for performing sound image localization along different moving paths, and the panning characteristic is selected according to time. Selected pannin
And switching and outputting grayed characteristics, the so was to impart a panning effect in the input musical tone at a movement path of a sound image corresponding to panning characteristics, course settings panning characteristics to perform sound image localization time at a different path respectively According to
And various panning effects different from the conventional panning effects can be obtained. According to the effect imparting device of the second aspect, at least one panning characteristic is selected from a plurality of panning characteristics having different sound pressure change characteristics corresponding to the panning positions.
And the selected panning characteristics according to the passage of time.
And switching and outputting sex. Thus imparting panning effect sound image movement path of in accordance with the sound pressure level based on the panning characteristics, the sound image localization based on the sound pressure changes characteristic corresponding to different panning positions respectively The setting of the panning characteristics to be performed becomes possible as time elapses, and various panning effects different from conventional panning effects can be obtained. According to the effect giving device of claim 3,
By dividing the panning data supplied by panning data supply means to the plurality of sections, switch the panning characteristic output for each segment, the panning effect to the musical tone based on Pan'nin <br/> grayed properties switched the The panning data is divided into different panning characteristics for performing sound localization on different moving paths .
This is possible for each section , and various panning effects different from conventional panning effects can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to claims of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a first exemplary embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 4 is a diagram illustrating input / output characteristics of an LFO according to a second embodiment.

FIG. 5 is a diagram illustrating input / output characteristics of a part of the panning table of the second embodiment and half of a sound image localization;

FIG. 6 is a diagram illustrating input / output characteristics of another part of the panning table and the other half of the sound image localization according to the second embodiment.

FIG. 7 is a diagram illustrating input / output characteristics of another example of the panning table.

FIG. 8 is a diagram illustrating input / output characteristics of another example of the panning table.

FIG. 9 is a diagram illustrating input / output characteristics of another example of the panning table.

FIG. 10 is a block diagram illustrating a configuration of a third exemplary embodiment of the present invention.

FIG. 11 is a circuit diagram showing a configuration of a conventional stereo pan pot.

FIG. 12 is a diagram showing an output sound pressure level of a conventional stereo panpot.

FIG. 13 is a diagram showing panning characteristics created by a conventional stereo pan pot.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Panning characteristic selection means 2 Panning data supply means 3 Volume balance data creation means 4 Panning effect imparting means 11 Panning table selection unit 12 Panning data setting unit 13 Panning table reference unit 14 Panning effect imparting unit 15 Music signal supply unit 16 Sound system 21 Tone signal supply device 22, 23 Multiplier 24 Phase angle generator 25 LFO 27 ... 30 Panning table 31, 32, 35, 36 Selector 33 Display 34 Counter

Claims (3)

(57) [Claims] At least one panning characteristic is selected from a plurality of panning characteristics for performing sound image localization along different moving paths, and the panning characteristics are selected according to time.
And panning characteristic selecting means for switching and outputting the selected panning characteristics, the panning data supply means for supplying a panning data to specify the panning position, the panning data supplied by the panning data supply means, the switched panning Volume balance data creating means for creating volume balance data corresponding to the characteristic; and using the volume balance data created by the volume balance data creating means, a panning effect is applied to a tone input on the movement path of the sound image corresponding to the panning characteristic. And a panning effect imparting means for imparting an effect. Wherein selecting at least one panning characteristic from among a plurality of panning characteristic having a different respective as sound pressure changes characteristic corresponding to the panning position
Together with the selected panning characteristics over time.
And panning characteristic selecting means for switching output, and panning data supply means for supplying a panning data to specify the panning position, the panning data supplied by the panning data supply means, volume balance corresponding to the switched panning characteristics Volume balance data creating means for creating data; and panning effect imparting means for imparting a panning effect to an input musical tone with the volume balance data created by the volume balance data creating means, the panning effect corresponding to the panning characteristic. An effect providing device for generating a sound change corresponding to a panning position. 3. A panning characteristic output means for selectively outputting at least one panning characteristic from among a plurality of panning characteristics, a panning data supply means for supplying panning data for specifying a panning position, and a supply of the panning data. The panning data supplied by the means is divided into a plurality of sections, and the panning characteristics switching means for switching the output panning characteristics for each section; and in accordance with the panning data supplied by the panning data supply means, Volume balance data generating means for generating volume balance data corresponding to the switched panning characteristic; and panning effect applying means for applying a panning effect to the input musical tone by the volume balance data generated by the volume balance data generating means. And Effect imparting device, characterized in that the.