JP3348819B2 - Electronic musical instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an electronic musical instrument,
More specifically, a tone signal input from the outside (hereinafter, referred to as
This is referred to as “external sound signal”. In particular, the present invention relates to an electronic musical instrument that can generate a musical tone having a pitch different from the pitch of an external sound signal.

[0002]

2. Description of the Related Art Conventionally, various electronic musical instruments have been provided on the market. Among them, for example, an electronic musical instrument called a guitar synthesizer is known.

An electronic musical instrument called a guitar synthesizer detects a pitch (pitch) and a volume of a string vibration signal of a guitar input as an external sound signal, and generates a musical tone based on the detected pitch and volume. A tone is produced by controlling a sound source as a means.

Here, the tone generated by the sound source is normally the same pitch as the pitch of the string vibration signal of the input guitar, but the tone of an arbitrary pitch is controlled by controlling the sound source. Can be pronounced. That is, the pitch of the musical tone generated by the sound source is set to a pitch different from the pitch of the string vibration signal of the input guitar, that is, the pitch higher than the pitch of the string vibration signal of the input guitar, Can be freely changed to a pitch lower than the pitch of the string vibration signal of the played guitar.

For this reason, in a guitar synthesizer, for example, the tone of the tone of the bass guitar is generated by a sound source at a pitch one octave lower than the pitch of the string vibration signal of the input guitar, and the tone of the bass guitar is generated. By superimposing the musical tone of the timbre and the guitar sound by the string vibration signal itself of the guitar, it is possible to generate a musical tone of a profound tone color.

In a conventional guitar synthesizer, the pitch of a musical tone generated by a sound source is determined by shifting a pitch detected from a string vibration signal of a guitar input as an external sound signal by a fixed amount. are doing. In other words, the frequency indicating the pitch of the musical tone generated by the sound source is determined by multiplying or dividing the frequency indicating the pitch detected from the string vibration signal of the guitar input as the external sound signal by a certain constant.

Accordingly, the frequency indicating the pitch of the string vibration signal of the guitar input as the external sound signal and the frequency indicating the pitch of the musical tone generated by the sound source always have a constant ratio. (Note that when comparing not the frequency indicating the pitch but the value obtained by logarithmically converting the frequency,
The value obtained by logarithmically converting the frequency indicating the pitch of the musical tone generated by the sound source and the value obtained by logarithmic converting the frequency indicating the pitch of the musical tone generated by the sound source always show a constant difference. ).

However, in the above-described conventional guitar synthesizer, the method of determining the pitch of a musical tone to be generated by a sound source by multiplying or dividing a frequency indicating the pitch of an input external sound signal by a certain constant is as follows: The performance of the guitar is performed in harmony with the predetermined scale (scale) and chords. Therefore, even if the input external sound signal maintains harmony with the predetermined scale (scale) and chords, the sound is generated by the sound source. There is a case where the pitch of the musical tone to be performed deviates from the predetermined scale or chord and becomes inconsistent, so that there is a problem that the use thereof is greatly limited.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to produce a pitch of an input external sound signal and a tone generated by a musical sound generating means. In order to avoid inconsistency with the pitch of the musical tone, a process of automatically adjusting the pitch variation of the tone generated by the musical tone generating means with respect to the pitch of the input external tone signal based on the scale and the chord is automatically performed. It is an object of the present invention to provide an electronic musical instrument capable of generating a musical tone having a pitch that is in harmony with the pitch of an external sound signal input by a musical tone generating means.

[0010]

[0011]

[0012]

In order to achieve the above object, according to the first aspect of the present invention, a pitch of an input external sound signal is detected, and a sound corresponding to the detected pitch is detected. Pitch detecting means for generating pitch information, a pitch shift amount table for storing a pitch shift amount in semitone steps corresponding to each pitch name, and a pitch shift amount table corresponding to the pitch information generated by the pitch detecting means. Means for determining a pitch name and referring to the pitch shift amount table based on the pitch name to determine a pitch shift amount;
Means for converting the pitch information generated by the pitch detecting means into quantized pitch information in semitone steps, and forming generated musical pitch information based on the quantized pitch information and the pitch shift amount; Means for generating pitch change information which is a difference value between the pitch information generated by the pitch detecting means and the quantized pitch information; and a sound based on the generated musical pitch information and the pitch change information. And a tone generating means for generating a high tone.

Therefore, according to the first aspect of the present invention,
A pitch name corresponding to the pitch of the external sound signal is determined, and based on the pitch name, a pitch shift amount table that stores a pitch shift amount in semitone steps corresponding to each pitch name is referred to, and A pitch shift amount corresponding to the pitch name is obtained, and the pitch information corresponding to the pitch of the external sound signal is converted into quantized pitch information in semitone steps, and the quantized pitch information and the pitch shift amount are calculated. Generates the generated musical tone pitch information, and generates a musical tone having a pitch based on the generated musical tone pitch information and the pitch change information. For example, a string vibration signal of a guitar is used as an external sound signal. In some cases, a tone that fluctuates in pitch in harmony with the pitch of an external sound signal that has subtle pitch fluctuations, such as subtle pitch fluctuations caused by the vibrato and the depressing of strings on the guitar strings, etc. can do.

[0014]

[0015]

[0016]

[0017]

Further, in the invention described in the first aspect, a plurality of pitch shift tables and a pitch shift table designating a predetermined pitch shift table from the plurality of pitch shift tables. Means may be provided so that the pitch shift amount table can be selected from a plurality of candidates.

Further, in the invention described in the first aspect, a plurality of pitch shift amount tables, key designating means for designating a key, scale designating means for designating a scale,
Frequency designation means for designating the frequency of the pitch shift amount,
A predetermined pitch shift amount table may be called from the plurality of pitch shift amount tables according to the specification contents of the key designation unit, the scale designation unit, and the frequency designation unit.

[0020]

Further, in the invention according to the first aspect, there is provided a second tone generation instruction means for instructing generation of a tone having a pitch corresponding to the pitch information detected by the pitch detection means. It may be. With this configuration, for example, in a guitar synthesizer, a synthesizer sound as a musical tone generated by changing the pitch detected from the external sound signal by the musical sound generating means, and a synthesizer sound detected from the external sound signal by the musical sound generating means. It is possible to instruct each of the musical tones and the synthesizer sounds generated at the changed pitches. In addition to such a configuration, a tone generating means for generating a tone in response to a tone generating instruction from the tone generating instruction means and the second tone generating instruction means, and a tone based on a tone generating instruction from the tone generating instruction means. And a mixing means for appropriately mixing and outputting the tone based on the tone generation instruction from the second tone generation instruction means. With this configuration, for example, in a guitar synthesizer, a synthesizer sound as a musical tone generated by changing the pitch detected from the external sound signal by the musical sound generating means, and a synthesizer sound detected from the external sound signal by the musical sound generating means. In this way, it is possible to mix and synthesize a musical tone, ie, a synthesizer sound generated at the changed pitch.

Further, in the invention according to the first aspect, a pitch shift amount table creating means for arbitrarily creating the pitch shift amount table, and a sound created by the pitch shift amount table creating means. A pitch shift amount table storing means for storing the high shift amount table may be provided so that the user can freely create the pitch shift amount table.

Further, in the above-mentioned invention, when the external sound signal is a string vibration signal, each string independent pickup for detecting the string vibration signal independently for each of a plurality of strings is provided. Alternatively, it may be possible to set, for each string, whether or not to issue a musical sound generation instruction by the musical sound generation instruction means.

Further, in the invention according to the first aspect, when the external sound signal is a string vibration signal, each string independent pickup for detecting the string vibration signal independently for each of a plurality of strings is provided. The musical tone generation instructing means instructs generation of a musical tone corresponding to a string vibration signal satisfying a predetermined condition among string vibration signals corresponding to a plurality of strings detected by the respective string independent pickups. You may. Here, the predetermined condition of the string vibration signal instructing generation of the corresponding musical tone is, for example, selecting the highest tone among the string vibration signals corresponding to a plurality of strings detected by the respective string independent pickups. It may be as follows.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an electronic musical instrument according to the present invention will be described in detail with reference to the accompanying drawings. 1. FIG. 1 is a block diagram showing an embodiment of an electronic musical instrument according to an embodiment of the present invention. FIG. 2 is a block diagram showing an electronic musical instrument according to an embodiment of the present invention. As shown, a string vibration signal detected by a pickup for a normal guitar sound (hereinafter, referred to as “guitar pickup”) 104 provided adjacent to a string 102 of an electric guitar 100 is externally provided. While being input as a sound signal, the strings 102 of the electric guitar 100
A string vibration signal detected by a synthesizer sound pickup (hereinafter, referred to as a “synthesizer sound pickup”) 106 provided adjacent to the input device is input as an external sound signal. The external sound signal input from the guitar sound pickup 104 is input to the mixer 28 as it is, and the external sound signal input from the synthesizer sound pickup 106 detects the pitch and volume from the external sound signal, and performs detection. A tone signal is generated by controlling a sound source 26 to be described later based on the input pitch and input volume, and is input to the mixer 28. The external sound signal input from the guitar sound pickup 104 by the mixer 28 and the sound source 26 The input tone signal is mixed and output.

That is, the electronic musical instrument includes a pitch detecting section 10 which detects the pitch of an external sound signal input from the synthesizer sound pickup 106 and outputs it as pitch information.
A pitch name monitoring unit 12 that generates and outputs pitch name information based on the pitch information output from the pitch detection unit 10 and detects an envelope level of an external sound signal input from the synthesizer sound pickup 106. An envelope detector 14; a sounding / stopping instruction unit 16 that outputs sounding start instruction information and sounding stop instruction information according to the detection result of the envelope detecting unit 14; and a sounding initial volume instruction according to the detection result of the envelope detecting unit 14. An initial volume instructing section 18 for outputting information, and a setting storage section 20 for storing a plurality of pitch shift amount tables and outputting a pitch shift amount table designated by operation of an operation section 22 described later.
And an operation unit 22 including an operation unit for specifying a desired pitch shift amount table from a plurality of pitch shift amount tables stored in the setting storage unit 20, and a pitch detection unit 10. The output pitch information, the pitch name information output from the pitch name monitoring unit 12, the sound generation start instruction information / sound generation stop instruction information output from the sound / stop instruction unit 16, and the sound output from the initial volume instruction unit 18. A sound source instructing unit that outputs pronunciation instruction information and pitch change information based on the initial volume instruction information and the pitch shift amount table that is output from the setting storage unit, and a sound generation instruction information that is output from the sound source instruction unit And a tone generator 26 for generating / stopping a tone signal based on the pitch change information, and mixing and outputting the tone signal generated by the tone generator 26 and the external tone signal input from the guitar pickup 104. And a Kisa 28.

Hereinafter, the electronic musical instrument having the above-described configuration will be described in more detail. As will be described later, a string vibration signal detected by the synthesizer pickup 106 and input as an external sound signal is output by the pitch detecting section 10. The high level is detected, and the envelope level is detected by the envelope detecting section 14, and the sound source instructing section 24 instructs the sound source 26 to sound according to the detection results.

Here, the sound generation instruction information transmitted from the sound source instruction unit 24 to the sound source 26 is a set of pitch information and sound intensity information in semitone units. Further, the sound source instructing unit 24 outputs pitch change information to the sound source 26 in order to express a change in pitch finer than a semitone. The pitch change information is information for changing the pitch corresponding to the above-mentioned pitch information in semitone units in units smaller than a semitone, and it is of course possible to change the pitch by more than a semitone. Therefore, in the sound source 26,
The pitch of the musical tone signal to be generated is controlled based on the pitch information in semitone units and the pitch change information in units smaller than a semitone. Note that the above-mentioned pronunciation instruction information, pitch information in semitone units, pronunciation intensity information, and pitch change information correspond to note-on, note number, velocity, and pitch bend change in the MIDI standard, respectively. Of course, the present invention is not limited to electronic musical instruments conforming to the MIDI standard.

Further, in the electronic musical instrument shown in this embodiment, a musical tone having the same pitch as the pitch of the external sound signal detected by the pitch detecting section 10 (hereinafter referred to as "normal synthesizer sound"). The tone generation instruction information to be generated and the tone of the pitch shifted from the pitch of the external tone signal detected by the pitch detection unit 10 as an object of the present invention (hereinafter referred to as “shift synthesizer tone”). ) Can be transmitted to the sound source 26 independently of each other. Further, in the electronic musical instrument shown in this embodiment, the above-mentioned pitch change information can also be sent to the sound source 26 independently of each other in correspondence with the normal synthesizer sound and the shift synthesizer sound. And

Therefore, in the electronic musical instrument shown in this embodiment, the tone generator 26 simultaneously generates and outputs the tone signal of the normal synthesizer sound and the tone signal of the shift synthesizer sound, so that the harmony between the synthesizer sounds is obtained. It is also possible to appropriately mix and output the external sound signal input from the guitar pickup 104, the sound signal of the normal synthesizer sound, and the sound signal of the shift synthesizer sound by the mixer 28. It has been made possible. Furthermore, the tone signal of the normal synthesizer sound and the shift
Synthesizer tone signal and guitar pickup 1
It is also possible to independently output the external sound signal input from the device 04.

That is, in the electronic musical instrument shown in this embodiment, the tone signal of the normal synthesizer sound, the tone signal of the shift synthesizer sound, and the external sound signal input from the guitar pickup 104 are used alone or separately. They can be mixed and output as appropriate. 2. Processing related to sounding of a normal synthesizer sound Here, first, processing of sounding of a normal synthesizer sound will be described. Then, the detected envelope level is sent to the sounding / stop instructing unit 16 and the instruction initial volume instruction unit 18. When the envelope level of the input external sound signal satisfies a predetermined condition, the initial sound volume indicator 1
8, the initial sound volume instruction information is transmitted to the sound source instruction unit 24, and the sound generation start instruction information is transmitted to the sound source instruction unit 24 by the sound / stop instruction unit 16. On the other hand, the pitch detecting section 10 detects the pitch of the input external sound signal, and outputs pitch information corresponding to the detected pitch to the pitch name monitoring section 1.
2 and to the sound source instruction unit 24.

Then, the tone generator 24 converts the pitch information sent from the pitch detector 10 into quantized pitch information in semitone steps by a process equivalent to rounding. In this embodiment, the calculation is performed assuming, for example, a value obtained by logarithmically converting the frequency as the pitch information. Therefore, subtraction and difference of pitch information mean division and quotient in frequency,
Speaking the addition and sum of pitch information means multiplication and product in frequency.

Then, the sound source instructing unit 24 then generates the quantized pitch information as the pitch information in semitone units and the initial sound volume instruction information as the sound intensity information sent from the initial volume instructing unit 18. The sounding instruction information as a set is transmitted to the sound source unit 26 based on the sounding start instruction information transmitted from the sounding / stop instruction unit 16.

The sound source instructing unit 24 corresponds to a difference value obtained by subtracting the quantized pitch information converted from the pitch change information in the sound source instructing unit 24 from the pitch information detected by the pitch detecting unit 10. The information to be transmitted is transmitted to the sound source unit 26 as pitch change information as needed.

The pitch information detected by the pitch detecting section 10 is updated as needed even during sound generation.
The value of the quantized pitch information converted in step (1) is retained until the sound generation stop instruction information is transmitted from the sound generation / stop instruction unit 16 to the sound source instruction unit 24, and is used for generating the pitch change information. For this reason, the pitch variation of the musical tone being generated can be all expressed by the pitch change information.

The tone generator 26 generates a tone signal indicating a tone having a pitch and a tone based on the tone generation instruction information and the pitch change information sent from the tone generator instruction section 24, and a new tone signal transmitted at any time. The pitch of the musical tone being generated is changed and controlled as needed based on the appropriate pitch change information.

As described above, the time change of the pitch of a musical tone from the start of sound generation to the stop of sound generation is expressed by pitch change information. Therefore, for example, when a string vibration signal of a guitar is used as an external sound signal, even if the pitch fluctuates due to the strength of vibrating, choking, arming, or the like when the string of the guitar is pressed during sounding, Until the sound generation stop instruction information is transmitted from the stop instruction unit 16 to the sound source instruction unit 24, only the pitch change information is transmitted to the sound source 26 without changing the quantized pitch information which is the pitch information in semitone units. Will be done.

Note that the pitch fluctuation during sounding includes a subtle fluctuation within a semitone due to the strength and vibrato when the strings of the guitar are depressed as described above, and a large fluctuation exceeding a semitone due to choking or arming. However, in any case, the control of pitch change during sound generation is performed by the above-described processing.

By the way, the tone generator 26 changes the pitch of a musical tone generated based on the received pitch change information. At this time, since new tone generation instruction information is not input, re-sound generation is performed. I will not be told. In other words, the volume envelope of the tone signal generated by the sound source 26 continues, and only the pitch is changed based on the pitch change information. 3. Next, the sound generation of the shift synthesizer sound will be described. The processing related to the pitch detection unit 10, the envelope detection unit 14, the sound / stop instruction unit 16, and the initial volume instruction unit 18 is described below. The processing is the same as the processing described in “2. Processing related to sounding of normal synthesizer sound”, and a duplicate description will be omitted.

The main point of the processing related to the generation of the shift synthesizer sound is that a pitch name corresponding to the pitch of the detected external sound signal is obtained, and the pitch adjustment (shift amount) is adjusted for each pitch name. And will be described in detail below.

Here, the setting storage unit 20 stores a plurality of pitch shift amount tables. The pitch shift amount table is, for example, a table as shown in FIG.
A pitch shift amount is stored in correspondence with each pitch name, and the pitch shift amount table includes pitch names whose corresponding pitch shift amounts are different from each other. Note that the pitch shift amount table may be selected in advance from a plurality of pitch shift amount tables. The pitch shift amount table includes a key (Key), a scale (Scale),
Since the pitch differs depending on the pitch difference or the like, the parameters shown in FIG. It may be.

The pitch name monitoring unit 12 performs a process corresponding to rounding of the pitch information sent from the pitch detection unit 10, thereby obtaining a pitch name (C, C) closest to the pitch indicated by the pitch information.
C sharp, D...) Are constantly monitored and determined, and tone name information indicating the determined tone name is transmitted to the sound source instruction unit 24. In this specification, the pitch name determined in this way is referred to as “actual pitch name”.

Since the actual note name is constantly monitored and determined as described above, a change in pitch due to, for example, choking during sounding (between the start of sound generation and the stop of sound generation) is also reflected in the actual sound name. Will be.

The sound source instructing section 24 selects a pitch shift amount corresponding to the actual pitch name transmitted from the pitch name monitoring section 12 from a plurality of pitch shift amount tables stored in the setting storage section 20. By adding the read pitch shift amount to the quantized pitch information obtained by converting the pitch information sent from the pitch detection unit 10 and reading the pitch information, and referring to the read pitch shift amount table. The musical tone pitch information is generated, and the generated musical tone pitch information is transmitted to the sound source 26. That is, the sound source 26 is instructed to generate a tone signal having a pitch corresponding to the generated tone pitch information.

By the way, for example, when a string vibration signal of a guitar is used as an external sound signal, the pitch of the actual string vibration always fluctuates. Such a change in pitch during sound generation is expressed by pitch change information as described in the above-mentioned “2. Processing related to sound generation of normal synthesizer sound”. That is, similarly to the normal synthesizer sound, the shift synthesizer sound is controlled to change the pitch according to the pitch change information corresponding to the change in the pitch during sounding, so that fine sounds such as vibrato are controlled. A shift synthesizer sound having a pitch difference that is musically harmonized with the pitch of the normal synthesizer sound can be generated without losing the high expression.

The pitch shift amount corresponding to the actual pitch name transmitted from the pitch name monitoring unit 12, which is a process performed in the sound source instruction unit 24, is stored in a plurality of pitch shift amount tables stored in the setting storage unit 20. The pitch shift amount read out with reference to the pitch shift amount table selected from the above and converted into the quantized pitch information obtained by converting the pitch information sent from the pitch detection unit 10 into semitone steps. In addition, it is preferable to perform the process of generating the generated musical tone pitch information as needed. When such processing is performed as needed, for example, when a string vibration signal of a guitar is used as an external sound signal, even if the pitch greatly changes due to choking or arming during sounding, it is determined and transmitted as needed in accordance with the string vibration. This is because the pitch shift amount corresponding to the actual sound name is determined as needed, and a musically harmonious pitch difference with respect to string vibration can be maintained.

Next, the processing for controlling the actual pitch will be described in more detail. The pitch name monitoring unit 1 controls the external sound signal input from the synthesizer pickup 106.
2 is transmitted to the sound source instructing unit 24, and the pitch shift amount corresponding to the actual pitch name is selected from the plurality of pitch shift amount tables stored in the setting storage unit 20. Determined based on the quantity table. On the other hand, the pitch information detected by the pitch detection unit 10 with respect to the external sound signal input from the synthesizer pickup 106 is converted by the sound source instruction unit 24 into quantized pitch information in semitone steps, and the converted quantization Generated tone pitch information in which pitch information is shifted by the determined pitch shift amount is generated. Then, the sound source instruction unit 24 combines the generated musical tone pitch information with the initial sound volume instruction information as the sound intensity information transmitted from the initial volume instruction unit 18 based on the sound generation start information from the sound / stop instruction unit 16. Is transmitted to the sound source unit 26. On the other hand, in the sound source instructing unit 24, a difference value between the pitch information and the quantized pitch information is generated as the pitch change information, and transmitted to the sound source unit 26. Then, the tone generator 26 generates a tone signal indicating a tone having a pitch and a tone based on the input tone generation instruction information and pitch change information. Further, based on the new pitch change information sent as needed, the pitch of the musical tone being generated is changed and controlled as needed. Note that the pitch information generated by the pitch detection unit 10 is updated as needed during sound generation, whereas the quantized pitch information converted by the sound source instruction unit 24 is transmitted from the sound generation / stop instruction unit 16. The point that the value is held until the sound generation stop instruction information is transmitted to the sound source instruction unit 24 and is used for generating the pitch change information is the same as in the above-described “2. Processing related to sound generation of normal synthesizer sound”. However, it will be described in detail below.

That is, during the sound generation (from the time when the sound generation start instruction information is transmitted from the sound generation / stop instruction unit 16 to the sound source instruction unit 24 to the time when the sound generation stop instruction information is transmitted), for example,
When using a string vibration signal of a guitar as an external sound signal, if there is a large pitch fluctuation in the string vibration signal due to choking or arming as well as the strength and vibrato when pressing the string of the guitar during sounding There is. In this case, the actual sound name monitored and determined by the sound name monitoring unit 12 at any time may change. In order to cope with such large pitch fluctuations, the present embodiment performs the processing described below.

First, the sound source instructing unit 24 provided for sounding instruction
In the pitch shift amount and the quantized pitch information converted from the pitch information determined with reference to the pitch shift amount table, respectively, as "special pitch shift amount" and "special quantized pitch information", It is stored in the sound source instruction unit 24.
This holding operation is performed every time a new sounding instruction is issued.

On the other hand, for an external sound signal input during sound generation, the pitch detecting section 10 detects the pitch at any time and sends pitch information, and the pitch name monitoring section 12 sends the pitch information sent at any time. The tone generator 24 determines the pitch shift amount corresponding to the actual pitch name by referring to the pitch shift amount table. Then, the sound source instructing unit 24 calculates a difference value obtained by subtracting the special pitch shift amount from the pitch shift amount for the input external sound signal, and special quantized pitch information from the pitch information for the input external sound signal. The information corresponding to the value obtained by adding the difference value obtained by subtracting the above is used as new pitch change information in the pitch change control of a musical tone whose pronunciation is instructed based on the pronunciation instruction information including the generated musical tone pitch information. Things.

By such a change control, for example, when a string vibration signal of a guitar is used as an external sound signal, when the string of the guitar is depressed during sounding, a subtle pitch change due to vibrato, choking or arming, etc. In response to pitch changes during pronunciation, including large pitch changes caused by the pitch, a shift synthesizer sound that maintains a musically harmonious pitch difference can be produced, and unnecessary Prevents pronunciation. In other words, even if a new real tone name is determined according to the pitch change, re-sounding is not performed, but only the pitch change control based on the pitch change information is performed.

Hereinafter, a specific operation example will be described. Here, Operation Example 1, Operation Example 2, and Operation Example 3 show an example in which there is a pitch change of more than a semitone, and Operation Example 4 shows a case in which Operation Examples 1 to 3 are generalized. I have.
As understood from the operation example 4, the pitch control corresponds to any pitch fluctuation during sound generation.
In the operation examples 1 to 4, the table shown in FIG. 3 is used as the pitch shift amount table, and pitch names (C, C sharp, D...) Are also used in the meaning of pitch. ing. The numerical values shown in the operation examples 1 to 4 represent one semitone as 1. (Operation Example 1: When the pitch of the external sound signal fluctuates to become D after the sound of C is generated) In this case, the pitch of the external sound signal at the start of sound generation: C after the start of sound generation The pitch of the external sound signal is D.

Since the pitch shift amount for the real pitch name C corresponding to the pitch at the start of the tone generation is "+4" and the pitch shift amount for the real pitch name D corresponding to the pitch after the start of the tone generation is "+3". Pitch of shift synthesizer sound at the start of pronunciation: E
(Quantized pitch + pitch shift amount = C + 4) Pitch of the shift synthesizer sound after the start of sounding: E + 1 From the new pitch shift amount of “+3”, the special pitch shift amount at the start of sounding +4 ”is added to the difference obtained by subtracting the special quantized pitch information C at the start of sound generation from the pitch information D of the external sound signal after the start of sound generation, and the pitch change information 1 (= 3) -4 + 2) is obtained. Therefore, the pitch of the generated musical tone is F, and a musically harmonious shift synthesizer sound can be obtained. (Operation example 2: When the pitch of the external sound signal fluctuates to become the sound of F after sounding the sound of E) In this case, the pitch of the external sound signal at the start of sounding: E after the sounding starts The pitch of the external sound signal: F 2.

The pitch shift amount for the real pitch name E corresponding to the pitch at the start of the sound generation is "+3", and the pitch shift amount for the real pitch name F corresponding to the pitch after the start of the sound generation is "+4". Pitch of shift synthesizer sound at the start of pronunciation: G
(Quantized pitch + pitch shift = E + 3) Pitch of the shift synthesizer sound after the start of sounding: G + 2 A special pitch shift at the start of sounding from a new pitch shift of “+4” +3 ”is added to the difference obtained by subtracting the special quantized pitch information E at the start of sound generation from the pitch information F of the external sound signal after the start of sound generation, and the pitch change information 2 (= 4 -3 + 1) is obtained. Therefore, the pitch of the generated musical tone is A, and a musically harmonious shift synthesizer sound can be obtained. (Operation example 3: When the pitch of the external sound signal fluctuates and becomes a G-sharp sound after the sound of G is generated) In this case, the pitch of the external sound signal at the start of sound generation: G after the sound starts Pitch of the external sound signal: G sharp.

The pitch shift amount for the real pitch name G corresponding to the pitch at the start of the sound generation is “+4”, and the pitch shift amount for the real pitch name G sharp corresponding to the pitch after the start of the sound generation is “+3”.
Therefore, the pitch of the shift synthesizer sound at the start of the sound: B
(Quantized pitch + pitch shift = G + 4) Pitch of shift synthesizer sound after start of sounding: B + 0 A special pitch shift at the start of sounding from "+3" which is a new pitch shift amount To the difference obtained by subtracting the special quantized pitch information G at the start of sound generation from the pitch information G sharp of the external sound signal after the start of sound generation, the pitch change information 0 (= 3-4 + 1) is obtained. Therefore, the pitch of the generated musical tone is B, and a musically harmonious shift synthesizer sound can be obtained. That is, in this case, the shift synthesizer sound does not change even if the pitch of the semitone changes. (Operation example 4: When the pitch of the external sound signal fluctuates to become x + t after the sound of pitch x is generated) In this case, the pitch of the external sound signal at the start of sound generation: x Start of sound generation The pitch of the later external sound signal is x + t.

The pitch shift amount with respect to the actual pitch name corresponding to the pitch x at the start of the sound generation is “+ a”, and the pitch x + t after the start of the sound generation.
Assuming that the pitch shift amount with respect to the real note name corresponding to “+ b” is “+ b”, the pitch of the shift synthesizer sound at the start of sound generation: x + a
(Quantized pitch + pitch shift amount) The pitch of the shift synthesizer sound after the start of pronunciation: x + a
+ □ The pitch of the generated musical tone is “x + t + b”, which is expressed in the form of “x + a + □”, which is the sum of the pitch information and the pitch change information included in the tone generation instruction information at the start of tone generation. In this case, “x + a + (ba−t)” is obtained. Here, □ is pitch change information, which is obtained by subtracting “+ a”, which is a special pitch shift amount at the start of sound generation, from “+ b”, which is a new pitch shift amount. Special quantized pitch information x after the start of sound generation from the pitch information x + t of the external sound signal of
Is subtracted, and a value obtained by adding a difference value t, that is, “ba + t”
Becomes In the above-described embodiment, the selection of the pitch shift amount table stored in the setting storage unit 20 is performed as follows.
It may be automatically performed in synchronization with the selection of the tone color. For example, by changing the selection of the pitch shift amount table during the performance by the operation unit 22 or an externally connected operation unit, for example, When the string vibration signal of the guitar is used as the external sound signal, the harmony of the guitar sound, the normal synthesizer sound, and the shift synthesizer sound corresponding to the chord progression of the music or the change of the melody can be maintained. Specifically, when a foot controller that sends out MIDI information is used as an externally connected controller, the pitch shift amount table is selected according to the note name of the note information sent by operating the foot controller. The key of the parameter to be used may be switched.

In the above-described embodiment, for example, when a string vibration signal of a guitar is used as an external sound signal, if a sound source corresponding to each string of the guitar is provided, the pitch of each string is changed. It is preferable to set whether or not to generate the converted shift synthesizer sound. At this time,
For example, the fifth and sixth strings assigning bass parts
By setting the strings so that they do not emit the pitch-converted shift synthesizer sound, it is possible to clarify the role sharing in the performance of each string.

Further, in the above-described embodiment, in order to clarify the role assignment in the performance of each string, for example, a shift synthesizer in which the pitch is converted into only the highest note in the string being played is used. You may make it sound by adding a sound. By performing such a process, it is possible to prevent the chords from being muddy due to excessive overlapping of sounds when performing a chord performance by generating a pitch-converted shift synthesizer sound. Note that, depending on the content of the performance, instead of adding a shift synthesizer sound whose pitch has been converted to the highest note and sounding it, the sound is generated by adding a shift synthesizer sound whose pitch has been converted to the second highest note or the like. In some cases, it is more effective to set the strings to which the pitch-converted shift synthesizer sound is to be added.

In the above-described embodiment, a plurality of pitch shift amount tables are stored in the setting storage unit 20, and an appropriate pitch shift amount table is selected from the plurality of pitch shift amount tables. Although the description has been given of the case of selecting and using, it is not limited to this, and only one pitch shift amount table is stored in the setting storage unit 20, and this table may be always used.

[0060]

Since the present invention is configured as described above, it is possible to avoid disharmony between the pitch of the input external sound signal and the pitch of the musical tone generated by the musical sound generating means. It has an excellent effect.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of an embodiment of an electronic musical instrument according to the present invention.

FIG. 2 is an explanatory diagram of an electric guitar including a pickup for guitar sound and a pickup for synthesizer sound.

FIG. 3 is an explanatory diagram showing an example of a pitch shift amount table.

FIG. 4 is an explanatory diagram showing an example of parameters for selecting a pitch shift amount table.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 pitch detecting section 12 note name monitoring section 14 envelope detecting section 16 sounding / stop instructing section 18 initial volume instructing section 20 setting storage section 22 operation section 24 sound source instructing section 26 sound source 28 mixer

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G10H 1/00 G10H 1/10-1/16 G10H 3/18

Claims (1)

(57) [Claims] 1. A method for detecting a pitch of an input external sound signal,
A pitch detecting means for generating pitch information corresponding to the pitch; a pitch shift amount table for storing a pitch shift amount in semitone steps corresponding to each pitch name; and a pitch shift amount table generated by the pitch detecting means. Means for determining a pitch name corresponding to the pitch information obtained, referring to the pitch shift amount table based on the pitch name to determine a pitch shift amount, and determining the pitch information generated by the pitch detection means. Means for converting into quantized pitch information in semitone increments, and generating generated tone pitch information by the quantized pitch information and the pitch shift amount; and pitch information generated by the pitch detecting means. Means for generating pitch change information that is a difference value from the quantized pitch information; and tone generation means for generating a tone having a pitch based on the generated tone pitch information and pitch change information. Electronic musical instruments.