JP6597553B2 - Harmony information generation apparatus, harmony information generation program, and harmony information generation method - Google Patents

Description

  The present invention relates to a harmony information generation device, a harmony information generation program, and a harmony information generation method.

  2. Description of the Related Art Conventionally, there is an electronic music device that specifies the pitch of a harmony sound to be added to a reference sound based on the pitch of the input reference sound and chord information, and outputs the reference sound and the harmony sound simultaneously (for example, , See Patent Document 1). In order to prevent the output chord (harmonies) from becoming monotonous, it is preferable to use a sound having relatively low consonance with the chord as the harmony sound. Patent Document 2 discloses a performance assist system that selectively generates chord sounds and tension sounds according to keys operated by a user. Specifically, when a white key is operated, a chord sound is generated using the normal conversion table, and when a black key is operated, a tension sound is generated using the tension conversion table.

Japanese Patent Laying-Open No. 2015-92269 Japanese Patent No. 3906997

  However, depending on the timing at which the tension sound is used, the harmony may become unstable and audibly unnatural. In the above-mentioned Patent Document 2, the user can intentionally adjust the timing of using the tension sound by a specific performance operation. However, in this case, the user is required to have knowledge about harmony. In addition, since a specific performance operation is required, the degree of freedom of performance is reduced.

  An object of the present invention is to provide a harmony information generation apparatus and a harmony information generation program capable of adding a harmony sound so that the degree of freedom of performance is ensured and the harmony is not monotonous and not audibly unnatural. And a harmony information generation method.

  The harmony information generation device according to the present invention includes a code acquisition unit that sequentially acquires code information, and a reference sound acquisition that sequentially acquires pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired code information. Means for acquiring first and second correspondence information indicating the correspondence between the pitch of the reference sound and the pitch of the harmony sound to be added for each chord, and the acquisition time of each chord information Selection means for selecting one of the first and second correspondence information for each reference sound based on the temporal relationship between the pitch and the acquisition point of the pitch information of each reference sound, and selection Generating means for identifying a harmony sound to be added to each reference sound based on the identified correspondence information, and generating harmony information including pitch information of the identified harmony sound, the first correspondence information On the basis of the Harmony note to be constant, compared to harmony note which is specified based on the second correspondence information, it has high Kyowa against target code.

  In this harmony information generation device, the first and second correspondence information is selectively used, so that a harmony sound having different synergistic properties with respect to the target chord is added to the reference sound. Therefore, the harmony is prevented from becoming monotonous. Further, one of the first and second correspondence information is selected for each reference sound based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound. The Thereby, it is possible to prevent a harmony sound having low cooperating property from being added at a timing at which the harmony is likely to be unstable, and to add a harmony sound so as not to be unnaturally audible. In addition, even when the reference sound is acquired in real time by the user's performance operation, the user does not need to perform a specific performance operation in order to add a different harmony harmony sound, thus ensuring the user's freedom of performance. Is done.

  The selection means selects the first correspondence information for a predetermined number of reference sounds acquired in order from the acquisition time point of the chord information among a plurality of reference sounds corresponding to the common chord information. Also good. Immediately after the chords are switched, the harmony tends to become unstable due to the addition of a harmony sound with low consonance. Therefore, since a harmony sound with low synergy is not added to a certain number of reference sounds after the chord information is acquired, it is possible to prevent the harmony from becoming audibly unnatural.

  The harmony information generation device according to the present invention includes a code acquisition unit that sequentially acquires code information, and a reference sound acquisition that sequentially acquires pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired code information. Specific sound satisfying a specific condition can be added as a harmony sound for each reference sound based on the time relationship between the acquisition time of each means and the pitch information acquisition time of each reference sound When it is determined that it is not possible to add a specific sound by generating a harmony information including pitch information of the specific sound when it is determined that the specific sound can be added with a determination unit that determines whether or not there is the specific sound Generating means for generating harmony information that does not include pitch information of the specific sound, and the specific condition is included in at least one of a plurality of scales that can be used for the corresponding chord information And that it does not contain the other of the at least one scale.

  In this harmony information generation device, when it is determined that a specific sound can be added as a harmony sound, harmony information including pitch information of the specific sound is generated. The addition of the specific sound as the harmony sound prevents the harmony from becoming monotonous. Further, it is determined whether or not a specific sound can be added as a harmony sound based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound. Thereby, it is possible to prevent a specific sound from being added at a timing when the harmony is likely to be unstable, and to add a harmony sound so as not to be unnaturally audible. Further, even when the reference sound is acquired in real time by the user's performance operation, the user does not need to perform a specific performance operation in order to add a specific harmony sound, so that the user's freedom of performance is ensured. The

  The determination means determines that a specific sound cannot be added to a predetermined number of reference sounds acquired in order from the acquisition time of the code information among a plurality of reference sounds corresponding to common chord information. May be. In this case, the specific sound is not added as a harmony sound to a certain number of reference sounds after the chord information is acquired, thereby preventing the harmony from being audibly unnatural.

  The harmony information generation program according to the present invention includes a step of sequentially acquiring chord information, a step of sequentially acquiring pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired chord information, Obtaining the first and second correspondence information respectively indicating the correspondence between the pitch of the reference sound and the pitch of the harmony sound to be added, the acquisition time of each chord information and the pitch information of each reference sound Based on the temporal relationship with the acquisition time point, the step of selecting one of the first correspondence information and the second correspondence information for each reference sound, and based on the selected correspondence information, The step of specifying a harmony sound to be added to the reference sound and generating harmony information including the pitch information of the specified harmony sound is executed by a computer, and based on the first correspondence information. Harmony note to be identified have, compared to the harmony note which is specified based on the second correspondence information, has high Kyowa against target code.

  The harmony information generation method according to the present invention includes a step of sequentially acquiring chord information, a step of sequentially acquiring pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired chord information, Obtaining the first and second correspondence information respectively indicating the correspondence between the pitch of the reference sound and the pitch of the harmony sound to be added, the acquisition time of each chord information and the pitch information of each reference sound Based on the temporal relationship with the acquisition time point, the step of selecting one of the first correspondence information and the second correspondence information for each reference sound, and based on the selected correspondence information, Identifying a harmony sound to be added to the reference sound and generating harmony information including pitch information of the identified harmony sound, the harmony identified based on the first correspondence information , Compared to a harmony note which is specified based on the second correspondence information, it has high Kyowa against target code.

  The harmony information generation program according to the present invention includes a step of sequentially acquiring chord information, a step of sequentially acquiring pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired chord information, and each code Whether or not a specific sound satisfying a specific condition can be added as a harmony sound for each reference sound based on the temporal relationship between the information acquisition time and the pitch information acquisition time of each reference sound Harmony information including pitch information of the specific sound is generated when it is determined that the specific sound can be added, and the sound of the specific sound is determined when it is determined that the specific sound cannot be added. Generating harmony information that does not include high information, and the specific condition is at least one of a plurality of scales that can be used for the corresponding code information. And included in the kale is not included in the other of the at least one scale.

  The harmony information generation method according to the present invention includes a step of sequentially acquiring chord information, a step of sequentially acquiring pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired chord information, and each chord Whether or not a specific sound satisfying a specific condition can be added as a harmony sound for each reference sound based on the temporal relationship between the information acquisition time and the pitch information acquisition time of each reference sound Harmony information including pitch information of the specific sound is generated when it is determined that the specific sound can be added, and the sound of the specific sound is determined when it is determined that the specific sound cannot be added. Generating harmony information that does not include high information, and the specific condition is included in at least one of a plurality of scales that can be used for the corresponding code information and It is that Kutomo not included in one scale.

  According to the harmony information generation program and the harmony information generation method, it is possible to add a harmony sound so that the degree of freedom of performance is ensured and the harmony is not monotonous and audibly unnatural. .

  According to the present invention, it is possible to add a harmony sound so that the degree of freedom of performance is ensured and the harmony is not monotonous and unnatural.

It is a block diagram which shows the structure of the electronic music apparatus containing the harmony information generation apparatus which concerns on the 1st Embodiment of this invention. It is a figure for demonstrating the specific example of a harmony table. It is a figure for demonstrating the specific example of addition of a harmony sound with respect to a reference | standard sound. It is a block diagram which shows the functional structure of the harmony information generation apparatus which concerns on 1st Embodiment. It is a flowchart which shows an example of a harmony information generation process. It is a flowchart which shows an example of a harmony information generation process. It is a figure for demonstrating the 1st and 2nd harmony table used by 2nd Embodiment. It is a block diagram which shows the functional structure of the harmony information generation apparatus which concerns on 2nd Embodiment. It is a figure which shows the other example of a harmony table. It is a figure which shows the other example of a harmony table.

  Hereinafter, a harmony information generation device, a harmony information generation program, and a harmony information generation method according to an embodiment of the present invention will be described in detail with reference to the drawings.

[1] First Embodiment (1) Configuration of Electronic Music Device FIG. 1 is a block diagram showing a configuration of an electronic music device including a harmony information generation device according to a first embodiment of the present invention. According to the electronic music apparatus 1 of FIG. 1, the user can perform performances and produce songs. The electronic music device 1 also includes a harmony information generation device 100 that generates harmony information. The harmony information includes pitch information of one or more harmony sounds to be added to the user's performance.

  The electronic music apparatus 1 includes a performance operator 2, an input I / F (interface) 3, a setting operator 4, a detection circuit 5, a display unit 6, and a display circuit 8. The performance operator 2 is connected to the bus 19 via the input I / F 3. The performance operator 2 is, for example, a keyboard. The user can input chord information and pitch information of the reference sound as performance data by operating the performance operator 2. The chord information may be represented by a chord name, or may be represented by a key (tone) and a degree name. The reference sound is a sound that serves as a reference for harmony, for example, a sound that constitutes the main melody of a song. The pitch information is represented by, for example, a note number or a pitch name.

  When a keyboard is used as the performance operator 2, for example, the keyboard is divided into a chord key range and a melody key range based on a specific boundary position. The chord key range is an area on the lower side (left side) than the boundary position, and the melody key range is an area on the higher side (right side) than the boundary position. The user can input the chord information by operating the chord key range with the left hand, and can input the pitch information of the reference sound by operating the melody key range with the right hand.

  The setting operator 4 includes a switch that is turned on / off, a rotary encoder that is rotated, a linear encoder that is slid, and the like, and is connected to the bus 19 via the detection circuit 5. The setting operation element 4 is used for adjusting the volume, turning on / off the power, and performing various settings. In the present embodiment, the harmony function is turned on and off by the operation of the setting operator 4. When the harmony function is turned on, a harmony sound is added to the reference sound input by the performance operator 2. The display unit 6 includes a liquid crystal display, for example, and is connected to the bus 19 via the display circuit 8. The display unit 6 displays various information related to performance or settings. The display unit 6 may be configured by a touch panel display.

  The electronic music apparatus 1 further includes a RAM (Random Access Memory) 9, a ROM (Read Only Memory) 10, a CPU (Central Processing Unit) 11, a timer 12 and a storage device 13. The RAM 9, ROM 10, CPU 11 and storage device 13 are connected to the bus 19, and the timer 12 is connected to the CPU 11. An external device such as the external storage device 15 may be connected to the bus 19 via a communication I / F (interface) 14. The RAM 9, ROM 10, CPU 11 and timer 12 constitute a computer.

  The RAM 9 is composed of, for example, a volatile memory, is used as a work area for the CPU 11, and temporarily stores various data. The ROM 10 is composed of, for example, a nonvolatile memory, and stores computer programs such as a system program and a harmony information generation program. The CPU 11 executes a harmony information generation program stored in the ROM 10 on the RAM 9 to perform harmony information generation processing to be described later, thereby generating harmony information. The timer 12 gives time information such as the current time to the CPU 11.

  The storage device 13 includes a storage medium such as a hard disk, an optical disk, a magnetic disk, or a memory card, and stores first and second correspondence information. The above harmony information generation program may be stored in the storage device 13. The first and second correspondence information respectively indicate the correspondence between the pitch of the reference sound and the pitch of the harmony sound to be added for each chord. In this example, the first and second harmony tables are used as the first and second correspondence information. With reference to the first and second harmony tables, a harmony sound to be added to the reference sound is specified. Specific examples of the first and second harmony tables will be described later. As the first and second correspondence information, a function or the like representing the correspondence between the pitch of the reference sound and the pitch of the harmony sound may be used instead of the harmony table.

  Similar to the storage device 13, the external storage device 15 includes a storage medium such as a hard disk, an optical disk, a magnetic disk, or a memory card, and may store a harmony information generation program.

  The harmony information generation program in the present embodiment may be provided in a form stored in a computer-readable recording medium and installed in the ROM 10 or the storage device 13. When the communication I / F 14 is connected to a communication network, a harmony information generation program distributed from a server connected to the communication network may be installed in the ROM 10 or the storage device 13.

  The electronic music apparatus 1 further includes a sound source 16, an effect circuit 17, and a sound system 18. The sound source 16 and the effect circuit 17 are connected to the bus 19, and the sound system 18 is connected to the effect circuit 17. The sound source 16 generates a musical sound signal based on performance data input by the performance operator 2 or harmony information generated by the CPU 11. The effect circuit 17 gives an acoustic effect to the musical sound signal generated by the sound source 16.

  The sound system 18 includes a digital analog (D / A) conversion circuit, an amplifier, and a speaker. The sound system 18 converts a musical sound signal given from the sound source 16 through the effect circuit 17 into an analog sound signal, and generates a sound based on the analog sound signal. Thereby, a musical sound signal is reproduced. In the electronic music apparatus 1, the performance operator 2, the RAM 9, the ROM 10, the CPU 11 and the storage device 13 mainly constitute the harmony information generation apparatus 100.

(2) Harmony Table In this example, first and second harmony tables are prepared for each code. The harmony sound specified based on the first harmony table has a higher degree of harmony with the target chord than the harmony sound specified based on the second harmony table. The harmony of the harmony sound with respect to the chord means auditory stability when the constituent sound of the chord and the harmony sound are played simultaneously.

  FIG. 2 is a diagram for explaining a specific example of the first and second harmony tables. FIG. 2A shows an example of the first harmony table, and FIG. 2B shows an example of the second harmony table. The harmony tables in FIGS. 2A and 2B correspond to the C major code, and are used when code information indicating the C major code is acquired.

  In the following explanation, the sounds having pitches of 3rd, 5th, 7th, 9th ... are called 3rd, 5th, 7th, 9th ... A semitone higher sound is marked with #, and a semitone lower than each sound is marked with ♭. The tension sound is a sound with relatively low synergy with chord constituent sounds (for example, root sound, 3rd, and 5th), typically 9th, 11th, and 13th, and a sound that is a semitone higher (# 9th). Etc.), as well as sounds that are semitones lower than these (eg, 9th). 6th or 7th may be a tension sound. In this example, a tension sound is predetermined for each chord.

  In this example, the first and second harmony tables define the pitch of the harmony sound to be added for each pitch of the reference sound. Each pitch is indicated by a pitch name. In this example, three harmony sounds having different pitches are added to one reference sound. When the pitch of the harmony sound belongs to an octave region different from the pitch of the reference sound, the pitch of the octave region is indicated by a positive sign or a negative sign as the pitch of the harmony sound. In this example, a range of 7 degrees long from “C” to “B” as the root sound is set as one octave region. “−1” represents an octave region that is one lower than the octave region to which the reference sound belongs, and “+1” represents an octave region that is one higher than the octave region to which the reference sound belongs. In the example of FIG. 2, “+” is not used. For example, in FIG. 2A, “E-1” of the harmony sound with respect to “C” of the reference sound means “E” that is 6 degrees lower than “C” of the reference sound, and “B” of the reference sound. “E” of the harmony sound with respect to “5” means “E” which is 5 degrees lower than “B” of the reference sound.

  The first harmony table of FIG. 2A shows only the constituent sounds of the target chord (in this example, “C”, “E” and “G” which are constituent sounds of the C major chord) as the harmony sounds. Contains tension sound. On the other hand, the second harmony table of FIG. 2B includes the tension sound of the target chord (in this example, “D” corresponding to 9th of the C major chord) in addition to the constituent sound of the target chord. .

  As for the chords other than the C major chord, as in the example of FIGS. 2A and 2B, the first harmony table that does not include the tension sound as the harmony sound and the first harmony sound that includes the tension sound. Two harmony tables are prepared in advance. The tension sound included in the second harmony table is not limited to 9th, and one or a plurality of tension sounds are appropriately determined for each chord.

  The higher the pitch of the reference sound, the higher the pitch of the added harmony sound. In this case, since the direction of change in the pitch of the reference sound is the same as the direction of change in the pitch of the harmony sound, a natural flow of harmony is formed. Further, a plurality of sets of first and second harmony tables for forming different atmosphere harmonies may be prepared for each cord. In this case, the harmony sounds added by the first and second harmony tables used are different. The user can switch the atmosphere of harmony by selecting one set of the first and second harmony tables from the plurality of sets.

(3) Specific Example of Harmony Information In the present embodiment, the first and second harmony tables are based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound. One of them is selected. The temporal relationship includes order and elapsed time.

  FIG. 3 is a diagram for explaining a specific example of adding a harmony sound to a reference sound. The upper part of FIG. 3 shows an example of obtaining chord information and pitch information of the reference sound in the sections T1 and T2, notes representing the reference sound, and the selected harmony table. The first and second harmony tables are indicated by “1” and “2”, respectively. The lower part of FIG. 3 shows a note representing the reference sound and the added harmony sound, and the added tension sound. In this example, the time signature is four quarters and the key (key) is “C major”.

  At the start of the section T1, a C major code is acquired as code information. Thereafter, “C”, “D”, “F”, and “E” are sequentially input as pitch information of the reference sound in the section T1. At the start of the section T2, an A minor code is acquired as code information. Thereafter, “E”, “A”, and “E” are sequentially input as pitch information of the reference sound in the section T2.

  In this example, the first harmony table is selected with respect to a predetermined number of reference sounds acquired in order from the acquisition time point of the chord information among a plurality of reference sounds corresponding to the common chord information. . That is, after the chord information is acquired, the first harmony table is selected as the reference sound acquired from the 1st to the nth (n is a predetermined number).

  In the example of FIG. 3, n is 1. Therefore, after the chord information is acquired, the first harmony table is selected for the reference sound acquired first. Specifically, in the section T1, the first harmony table is selected for “C” acquired first after the C major code is acquired as the code information. In the section T2, the first harmony table is selected for “E” acquired first after the A minor code is acquired as the code information.

  In addition, the second harmony table is selected for the reference sounds acquired after the (n + 1) th from the acquisition point of the chord information. In the example of FIG. 3, the second harmony table is selected for “D”, “F”, and “E” acquired after the C major code is acquired as the code information in the section T1. Is done. In the section T2, the second harmony table is selected for “A” and “E” acquired after the A minor code is acquired as the code information.

  When the first harmony table is selected, the harmony sound to be added is identified with reference to the first harmony table, and harmony information including the pitch information of the identified harmony sound is generated. In this case, the generated harmony information does not include the pitch information of the tension sound. On the other hand, when the second harmony table is selected, the harmony sound to be added is identified with reference to the second harmony table, and harmony information including the pitch information of the identified harmony sound is generated. In this case, the generated harmony information includes pitch information of the tension sound.

  Specifically, as the pitch of the harmony sound to be added to the reference sound “C” acquired first in the section T1, referring to the first harmony table in FIG. ”,“ E-1 ”and“ C-1 ”are specified, and harmony information including the pitch information of these reference sounds and harmony sounds is generated.

  As the pitch of the harmony sound to be added to the reference sound “D” acquired second in the section T1, referring to the second harmony table in FIG. 2B, “G-1”, “E- "1" and "D-1" are specified, and harmony information including the pitch information of these reference sounds and harmony sounds is generated. Similarly, for the subsequent reference sounds “F” and “E”, harmony information is generated with reference to the second harmony table of FIG.

  In the section T2, referring to a first harmony table (not shown) corresponding to the A minor chord as the pitch of the harmony sound to be added to the reference sound “E” acquired first, “C ”,“ A ”, and“ E-1 ”are specified, and harmony information including the pitch information of these reference sounds and harmony sounds is generated. For the reference sound “A” acquired second and “E” input third, harmony information is generated with reference to the second harmony table corresponding to the A minor code.

  In the example of FIG. 3, as the temporal relationship between the acquisition time of the chord information and the acquisition time of the pitch information of the reference sound, based on the acquisition order of the pitch information of each reference sound after the acquisition of the chord information, One of the first and second harmony tables is selected, but the harmony table may be selected under other conditions. For example, the first harmony table may be selected for a reference sound acquired within a predetermined real time or a predetermined number of beats from the acquisition time of the chord information.

(4) Functional Configuration FIG. 4 is a block diagram showing a functional configuration of the harmony information generation apparatus 100 according to the first embodiment. As shown in FIG. 4, the harmony information generation device 100 includes a chord acquisition unit 21, a reference sound acquisition unit 22, a correspondence information acquisition unit 23, a selection unit 24, a generation unit 25, and an output control unit 26. The CPU 11 in FIG. 1 executes the harmony information generation program stored in the ROM 10 or the storage device 13, thereby realizing each functional unit in FIG. 4. These functional units may be realized by hardware such as an electronic circuit.

  The chord acquisition unit 21 sequentially acquires chord information, and the reference sound acquisition unit 22 sequentially acquires pitch information of the reference sound so as to correspond to the acquired chord information. For example, when the user operates the performance operator 2 in FIG. 1, a note-on signal is generated as a MIDI (Musical Instrument Digital Interface) signal. The chord acquisition unit 21 acquires chord information based on a note-on signal indicating the chord key range operation of the performance operator 2. The reference sound acquisition unit 22 acquires pitch information of the reference sound based on the note-on signal indicating the operation of the melody key range of the performance operator 2.

  The correspondence information acquisition unit 23 acquires the first and second harmony tables stored in the storage device 13 of FIG. The selection unit 24 selects one of the first and second harmony tables for each reference sound based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound. Select. In this example, the selection unit 24 performs a first harmony with respect to a predetermined number of reference sounds acquired in order from the acquisition time of the chord information among a plurality of reference sounds corresponding to the common chord information. A table is selected, and a second harmony table is selected for reference sounds acquired thereafter.

  The generation unit 25 specifies a harmony sound to be added to each reference sound based on the selected harmony table, and generates harmony information including pitch information of the specified harmony sound. In this example, the generation unit 25 generates harmony information including the pitch information of the tension sound when the first harmony table is selected, and when the second harmony table is selected, the generation unit 25 generates the tension sound. Harmony information that does not include pitch information is generated. The output control unit 26 controls the sound source 16 of FIG. 1 so that the reference sound and the harmony sound are output based on the generated harmony information. Moreover, the output control part 26 controls the sound source 16 of FIG. 1 so that a chord sound is output based on the acquired chord information. An automatic accompaniment sound based on the acquired chord information may be output instead of the chord sound or in addition to the chord sound.

(5) Harmony Information Generation Processing FIG. 5 and FIG. 6 are flowcharts showing an example of harmony information generation processing by each functional unit of FIG. The harmony information generation process of FIGS. 5 and 6 is performed by the CPU 11 of FIG. 1 executing a harmony information generation program stored in the ROM 10 or the storage device 13. Further, in this example, the storage device 13 in FIG. 1 stores “current code” indicating the acquired code information, and “correspondence” indicating the first and second harmony tables corresponding to the acquired code information. "Table" is stored.

  First, the code acquisition unit 21 determines whether or not an input of code information has been detected (step S1). For example, when a note-on signal indicating a key depression in the chord key range of the performance operator 2 is generated, the chord acquisition unit 21 detects an input of chord information. When the input of code information is detected, the code acquisition unit 21 acquires the input code information (step S2), and the code indicated by the acquired code information indicates the “current code” stored in the storage device 13 (Step S3). Further, the correspondence information acquisition unit 23 acquires the first and second harmony tables corresponding to the acquired code information, and updates the “correspondence table” stored in the storage device 13 (step S4). Further, the selection unit 24 resets “COUNT” representing the counter value to 0 (step S5). If the input of code information is not detected in step S1, steps S2 to S5 are skipped.

  Next, the output control unit 26 controls the sound source 16 so that the chord sound corresponding to the “current chord” is output from the sound system 18 (step S6). Thereby, the sound system 18 of FIG. 1 outputs a chord sound. The chord sound output is stopped, for example, when the chord key range of the performance operator 2 is released (when a note-off signal is generated) or when the next chord information is acquired. The

  Next, the reference sound acquisition unit 22 determines whether or not the mute of the reference sound has been instructed (step S7). For example, when a note-off signal indicating the release of key depression in the melody key range of the performance operator 2 is generated, the reference sound acquisition unit 22 determines that the mute of the reference sound has been instructed. When the mute of the reference sound is instructed, the output control unit 26 controls the sound source 16 so that the reference sound and the harmony sound output at that time are mute (step S8).

  Next, the reference sound acquisition unit 22 determines whether or not the input of the pitch information of the reference sound has been detected (step S9). For example, when a note-on signal indicating the depression of the melody key range of the performance operator 2 is generated, the reference sound acquisition unit 22 detects the input of the pitch information of the reference sound. If the input of the pitch information of the reference sound has not been detected, the code acquisition unit 21 returns to step S1. When the input of the pitch information of the reference sound is detected, the reference sound acquisition unit 22 acquires the pitch information of the reference sound (step S10), and the selection unit 24 adds 1 to “COUNT” (step S11). ).

  Next, the selection unit 24 determines whether “COUNT” is 2 or more (step S12 in FIG. 6). After the chord information is acquired in step S2, if only one reference pitch information is input, “COUNT” is 1, and two or more reference pitch information is input. In this case, “COUNT” is 2 or more.

  When “COUNT” is smaller than 2 (when 1), the selection unit 24 selects the first harmony table from the first and second harmony tables stored as the “correspondence table” (step S13). When “COUNT” is 2 or more, the selection unit 24 selects the second harmony table from the first and second harmony tables stored as the “correspondence table” (step S14).

  Subsequently, the generation unit 25 refers to the selected harmony table, specifies one or more harmony sounds to be added to the reference sound acquired in the immediately preceding step S10, and generates harmony information (step S15). . When the first harmony table is selected in step S13, the harmony information generated in step S15 does not include the pitch information of the tension sound. When the second harmony table is set in step S14, the harmony information generated in step S15 includes the pitch information of the tension sound. Next, the output control unit 26 controls the sound source 16 so that the reference sound and the harmony sound are output based on the generated harmony information (step S16). Thereafter, steps S1 to S16 are repeated.

(6) Effects of First Embodiment In the harmony information generation device 100 according to the first embodiment, the first and second harmony tables are selectively used, so that the target code can be obtained. Harmony sounds having different synergistic properties are added to the reference sound. Therefore, the harmony is prevented from becoming monotonous. Also, one of the first and second harmony tables is selected for each reference sound based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound. The Thereby, it is possible to prevent a harmony sound having low cooperating property from being added at a timing at which the harmony is likely to be unstable, and to add a harmony sound so as not to be unnaturally audible. In addition, even when the reference sound is acquired in real time by the user's performance operation, the user does not need to perform a specific performance operation in order to add a different harmony harmony sound, thus ensuring the user's freedom of performance. Is done.

  Further, immediately after the chords are switched, the harmony tends to become unstable due to the addition of a harmony sound with low cooperativity. Therefore, in the present embodiment, the first harmony table is selected as the reference sound acquired 1 to nth from the chord information acquisition time, and is acquired after the (n + 1) th from the chord information acquisition time. The second harmony table is selected as the reference sound. Thereby, immediately after the chords are switched, a harmony sound with low cooperating property is not added, so that the harmony is prevented from becoming unnaturally unnatural. Further, when a certain number of reference sounds are acquired after the chords are switched, a harmony sound having a relatively low cooperativeness can be added. Thereby, a change is added to a harmony and it is prevented that a harmony becomes monotonous.

[2] Second Embodiment The harmony information generation apparatus 100 according to the second embodiment of the present invention will be described with respect to differences from the harmony information generation apparatus 100 according to the first embodiment.

(1) Specific Sound FIG. 7 is a diagram for explaining the first and second harmony tables used in the second embodiment. FIG. 7A shows an example of the first harmony table, and FIG. 7B shows an example of the second harmony table. The first and second harmony tables in FIGS. 7A and 7B correspond to the C Six (C ₆ ) code, and are used when code information indicating the C Six Code is acquired. It is done.

  In the present embodiment, the first harmony table includes only common sounds (hereinafter referred to as scale common sounds) respectively included in a plurality of scales that can be used for the corresponding chords as the harmony sounds. On the other hand, the second harmony table is a harmony sound that is included in at least one usable scale and not included in at least one other usable scale in addition to the common scale sound (hereinafter referred to as a specific sound). Called).

  The scale that can be used for each chord is, for example, a scale that starts from the root note of the chord and includes all the constituent sounds of the chord. Examples of scales that can be used for C Six Code are C Major Scale, C Lydian Scale, and C Mixoridian Scale. These scales begin with “C”, which is the chord root note, and include “C”, “E”, “G”, and “A”, which are chord constituent sounds. The common sounds of the C major scale, C ridian scale, and C mixolydian scale are “C”, “D”, “E”, “G”, and “A”, and the specific sounds are “F”, “F” #, “B” and “B ♭”.

  The first harmony table in FIG. 7A includes “C”, “D”, “E”, “G”, and “A”, which are common scale sounds, as harmony sounds. In the example of FIG. 7A, when the reference sound is a chord constituent sound, the added harmony sound is a chord constituent sound (“C”, “E”, “G” or “A”). is there. When the pitch of the reference sound is not a constituent sound of the chord, the added harmony sound is a scale common sound (“C”, “D”, “E”, “G” or “A”).

  The second harmony table in FIG. 7B includes “F”, “F #”, “B”, and “B ♭” that are specific sounds in addition to the above-mentioned common sound of scale as the harmony sound. In the example of FIG. 7B, when the reference sound is a chord constituent sound, the added harmony sound is a chord constituent sound. When the reference sound is not a chord constituent sound, the added harmony sound is a scale common sound or a specific sound. More specifically, when the reference sound is “D” which is a scale common sound other than the constituent sounds of the chord, or “F”, “F #”, “B” or “B ♭ (A #) ”, The added harmony sound is a scale common sound. When the reference sound is “C #”, “D #”, or “G #”, which is neither the scale common sound nor the specific sound, the added harmony sound includes the specific sound.

  In the example of FIG. 7B, since the specific sound is included as the harmony sound added to the reference sounds “C #”, “D #”, and “G #”, the reference sound and the harmony sound are used. A diminished code is constructed. “C #”, “D #”, and “G #” are not constituent sounds of a chord, and are neither a scale common sound nor a specific sound, so they are not continuous sounds and a process for shifting to another reference sound. It is likely to be used as sound. Diminished chords, when used over time, produce a unique sound while being audibly natural. Therefore, by adding the harmony sound constituting the diminished chord to “C #”, “D #”, and “G #”, it is effectively prevented that the harmony becomes monotonous.

  If the connection before and after the harmony is smooth and perceptually natural, a harmony sound different from the above example may be added. For example, when the reference sound is a chord constituent sound, a scale common sound or a specific sound other than the chord constituent sound may be added as a harmony sound.

(2) Functional Configuration FIG. 8 is a block diagram illustrating a functional configuration of the harmony information generation apparatus 100 according to the second embodiment. The example of FIG. 8 will be described while referring to differences from the example of FIG. The harmony information generation apparatus 100 in FIG. 8 includes a determination unit 24A and a generation unit 25A instead of the selection unit 24 and the generation unit 25 in FIG.

  Whether the determination unit 24A can add a specific sound as a harmony sound to each reference sound based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound. Determine whether or not. In this example, the determination unit 24A adds a specific sound to a predetermined number of reference sounds that are sequentially acquired from the acquisition time point of the code information among a plurality of reference sounds corresponding to common code information. Determine that it is not possible.

  When it is determined that the specific sound can be added, the generation unit 25A generates harmony information including pitch information of the specific sound, and when it is determined that the specific sound cannot be added, the sound of the specific sound Harmony information that does not contain high information is generated.

  Each functional unit in FIG. 8 performs the harmony information generation processing in FIG. 5 and FIG. 6 in the same manner as each functional unit in FIG. In this case, the process of steps S5, S11 to S14 is performed by the determination unit 24A instead of the selection unit 24, and the process of step S15 is performed by the generation unit 25A instead of the generation unit 25.

(3) Effects of Second Embodiment In the harmony information generation device 100 according to the second embodiment, when it is determined that a specific sound can be added as a harmony sound, the pitch information of the specific sound Harmony information including is generated. The addition of the specific sound as the harmony sound prevents the harmony from becoming monotonous. Further, it is determined whether or not a specific sound can be added as a harmony sound based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound. Thereby, it is possible to prevent a specific sound from being added at a timing when the harmony is likely to be unstable, and to add a harmony sound so as not to be unnaturally audible. Further, even when the reference sound is acquired in real time by the user's performance operation, the user does not need to perform a specific performance operation in order to add a specific harmony sound, so that the user's freedom of performance is ensured. The

(4) Modification In addition to the above temporal relationship, the determination unit 24A determines whether or not a specific sound can be added based on whether or not the corresponding chord information represents a chord including a tension sound. May be. Furthermore, in addition to the above temporal relationship, the determination unit 24A determines whether or not a tension sound can be added based on whether or not the corresponding code information represents a code that can be converted into a code including a tension sound. May be determined. Whether or not the chord can be converted into a chord including a tension sound depends on whether or not a musical failure occurs due to the chord conversion. The determination of whether or not conversion is possible may be performed based on the key, the code of the previous section, or the like, or may be performed based on a conversion table that defines a conversion pattern for each code.

  In this embodiment, the harmony sound is specified with reference to the first and second harmony tables, but the harmony sound may be specified by other methods. For example, a function representing the relationship between the pitch of the reference sound and the pitch of the harmony sound may be determined, and the harmony sound may be specified using the function. Or a harmony sound may be specified at random from a chord sound or a specific sound. In any case, when it is determined that the specific sound can be added, the harmony sound is specified to include the specific sound, and when it is determined that the specific sound cannot be added, the specific sound is Harmony sounds are specified so that they are not included.

  Further, in the harmony information generating apparatus 100 according to the first embodiment, the first and second harmony tables having the same characteristics as the example of FIG. 7 are used as the first and second correspondence information. Good.

[3] Other Examples of Harmony Table The first and second harmony tables used as the first and second correspondence information are not limited to the above example. As the first and second correspondence information, the following harmony table may be used.

  9 and 10 are diagrams showing another example of the harmony table. FIGS. 9A and 10A show the first harmony table, and FIGS. 9B and 10B show the second harmony table.

  The harmony tables in FIGS. 9A and 9B correspond to the C six code, and are used when code information indicating the C six code is acquired. The first harmony table in FIG. 9A includes “C”, “D”, “E”, “G”, and “A” as harmony sounds. These harmony sounds are the same as the harmony sounds included in the example of FIG. 7A, and are common sounds included in a plurality of scales (C major scale etc.) that can be used for the corresponding chords.

  The second harmony table in FIG. 9B includes “F” and “G #” in addition to the harmony sounds included in the first harmony table in FIG. 9A as the harmony sounds. These harmony sounds correspond to constituent sounds of the C major bebop scale. In the example of FIG. 9B, the harmony sound constituting the diminished chord is added to the reference sounds “D”, “F”, “G #”, and “B”.

  The harmony tables of FIG. 10A and FIG. 10B correspond to the C dominant seventh code, and are used when code information indicating the C dominant seventh code is acquired. The first harmony table in FIG. 10A includes “C”, “D”, “E”, “G”, and “A #” as harmony sounds. These harmony sounds are constituent sounds of the C mixolydian scale, which is one of the chords that can be used for the corresponding chords.

  In the second harmony table of FIG. 10B, in addition to the harmony sounds included in the first harmony table of FIG. 10A as the harmony sounds, “D #”, “F”, “F #” , “G #” and “B”. These harmony sounds are composed of a combination of constituent sounds of a plurality of scales (for example, a C blue note scale and a C hole tone scale) that can be used for a corresponding chord. In the example of FIG. 10B, harmony sounds constituting the diminished chord are added to the reference sounds “D”, “F”, “A”, and “B”.

  As described above, the first and second harmony tables having various characteristics can be used as the first and second correspondence information. In any example, the harmony sounds included in the first and second harmony tables are composed of combinations of sounds that can be used for the corresponding chords.

Moreover, you may use the structure sound of the code | cord | chord which can make a smooth transition between the object codes | symbols as a harmony sound. In the above example, the diminished code corresponds to a code that can be smoothly transferred to and from the target code. For example, in the example of FIG. 9, the transition from _{C 6} is the code of the target to _{C 6} from migration and Ddim to Ddim can be carried out smoothly. For this reason, the harmony sound that constitutes such a chord over time is used, so that it is audibly natural and the harmony does not become monotonous.

  9 and 10, the harmony sound specified based on the first harmony table is higher in harmony with the target chord than the harmony sound specified based on the second harmony table. Have sex. For this reason, the first and second harmony tables are selectively used to prevent the harmony from becoming monotonous. In addition, the harmony table is selected based on the temporal relationship between the time of acquisition of each chord information and the time of acquisition of the pitch information of each reference sound, so that harmony with low coherence at a timing when the harmony tends to become unstable. It is possible to prevent a sound from being added and to add a harmony sound so as not to make the sound unnatural.

  Specifically, it is possible to prevent a harmony sound having low consonance from being added to the chord sound at the timing when the chord sound is input by the left hand. Alternatively, when performing an ensemble with another player, it is possible to prevent a harmony sound having low consonance from being added to the chord sound when the other player plays the chord sound. In this way, in various situations, it is possible to generate a natural harmony that is not monotonous and audible.

[4] Other Embodiments In the above embodiment, the harmony information is generated in real time when the user performs, but the harmony information may be generated in non-real time after the performance data is acquired.

  In generating the harmony information, other conditions may be considered in addition to the above conditions. For example, it is determined whether the acquisition point of the pitch information of the reference sound is a strong beat or a weak beat, and the second harmony table may be selected only when it is a weak beat. Further, when the harmony information is generated in non-real time, the harmony information may be generated in consideration of the tone value of the input reference sound. For example, the second harmony table may be selected only when the reference sound has a length equal to or shorter than an eighth note.

  When the user actually performs, the chord and the melody to be played at the same timing may be played with a slight shift depending on how the user plays. Therefore, after the pitch information of the reference sound is input, the chord information corresponding to the reference sound is input, and the harmony information may not be generated appropriately. In order to avoid such inconveniences due to deviations in input timing, a certain delay time (for example, several ms to several tens of ms) is set between the input of the pitch information of the reference sound and the generation of harmony information. When the chord information is input within the delay time, harmony information corresponding to the previously input reference sound may be generated based on the chord information. Thereby, even when the input timing is shifted, it is possible to generate harmony information appropriately.

  Instead of the chord information being directly input by the user by operating the chord key range, the chord information may be detected by a known technique from the user's performance. Moreover, the chord information which should be acquired in each area of a music may be previously memorize | stored in the memory | storage device 13 grade | etc.,. Alternatively, code information may be detected from music data read from a storage medium or the like. Similarly, the pitch information of the reference sound may be stored in advance in the storage device 13 or the like, or may be detected from music data read from a storage medium or the like.

  The harmony information generation apparatus 100 is not limited to the electronic music apparatus 1 and may be applied to other electronic devices such as a personal computer or a smart device.

[5] Correspondence between each constituent element of claims and each part of the embodiment Examples of correspondence between each constituent element of the claims and each part of the embodiment will be described below, but the present invention is limited to the following examples. Not. As each constituent element in the claims, various other elements having configurations or functions described in the claims can be used.

  In the above embodiment, the harmony information generation device 100 is an example of a harmony information generation device, the code acquisition unit 21 is an example of a code acquisition unit, and the reference sound acquisition unit 22 is an example of a reference sound acquisition unit. The information acquisition unit 23 is an example of correspondence information acquisition means, the selection unit 24 is an example of selection means, the determination unit 24A is an example of determination means, and the generation units 25 and 25A are examples of generation means.

  The present invention can be effectively used for an electronic music apparatus or the like having a function of adding a harmony sound.

DESCRIPTION OF SYMBOLS 1 ... Electronic music apparatus, 2 ... Performance operator, 9 ... RAM, 10 ... ROM, 11 ... CPU, 13 ... Storage device, 21 ... Chord acquisition part, 22 ... Reference sound acquisition part, 23 ... Corresponding information acquisition part, 24 ... Selection unit, 24A ... Determination unit, 25, 25A ... Generation unit, 26 ... Output control unit, 100 ... Harmony information generation device

Claims (8)

Code acquisition means for sequentially acquiring code information;
Reference sound acquisition means for sequentially acquiring pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired chord information;
Correspondence information acquisition means for acquiring first and second correspondence information respectively indicating the correspondence between the pitch of the reference sound and the pitch of the harmony sound to be added for each chord;
Based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound, one of the first and second correspondence information is assigned to each reference sound. A selection means to select;
Generating means for identifying a harmony sound to be added to each reference sound based on the selected correspondence information, and generating harmony information including pitch information of the identified harmony sound;
The harmony information generating device, wherein the harmony sound specified based on the first correspondence information has higher harmony with the target chord than the harmony sound specified based on the second correspondence information . The selection means selects the first correspondence information with respect to a predetermined number of reference sounds acquired in order from the time of acquisition of the chord information among a plurality of reference sounds corresponding to common chord information. The harmony information generation device according to claim 1. Code acquisition means for sequentially acquiring code information;
Reference sound acquisition means for sequentially acquiring pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired chord information;
Whether a specific sound that satisfies a specific condition can be added as a harmony sound to each reference sound based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound Determination means for determining whether or not
When it is determined that the specific sound can be added, harmony information including pitch information of the specific sound is generated, and when it is determined that the specific sound cannot be added, the pitch of the specific sound is determined. Generating means for generating harmony information not including information,
The harmony information generation device, wherein the specific condition is that it is included in at least one scale among a plurality of scales that can be used for the corresponding code information and is not included in at least one other scale. The determination means is not capable of adding the specific sound to a predetermined number of reference sounds acquired in order from the acquisition time of the code information among a plurality of reference sounds corresponding to common chord information. The harmony information generation device according to claim 3 which judges. Sequentially obtaining code information;
Sequentially acquiring pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired chord information;
Obtaining first and second correspondence information respectively indicating a correspondence relationship between a pitch of a reference sound and a pitch of a harmony sound to be added for each chord;
Based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound, one of the first and second correspondence information is assigned to each reference sound. A step to choose;
Identifying a harmony sound to be added to each reference sound based on the selected correspondence information, and generating harmony information including pitch information of the identified harmony sound,
Let the computer run,
A harmony information generation program in which the harmony sound specified based on the first correspondence information has higher harmony with the target code than the harmony sound specified based on the second correspondence information . Sequentially obtaining code information;
Sequentially acquiring pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired chord information;
Obtaining first and second correspondence information respectively indicating a correspondence relationship between a pitch of a reference sound and a pitch of a harmony sound to be added for each chord;
Based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound, one of the first and second correspondence information is assigned to each reference sound. A step to choose;
Identifying a harmony sound to be added to each reference sound based on the selected correspondence information, and generating harmony information including pitch information of the identified harmony sound,
A harmony information generation method in which the harmony sound specified based on the first correspondence information has higher harmony with the target chord than the harmony sound specified based on the second correspondence information . Sequentially obtaining code information;
Sequentially acquiring pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired chord information;
Whether a specific sound that satisfies a specific condition can be added as a harmony sound to each reference sound based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound Determining whether or not
When it is determined that the specific sound can be added, harmony information including pitch information of the specific sound is generated, and when it is determined that the specific sound cannot be added, the pitch of the specific sound is determined. Generating harmony information that does not include information,
Let the computer run,
The harmony information generation program, wherein the specific condition is that it is included in at least one scale among a plurality of scales that can be used for the corresponding code information and is not included in at least one other scale. Sequentially obtaining code information;
Sequentially acquiring pitch information of a reference sound serving as a reference for harmony so as to correspond to the acquired chord information;
Whether or not a specific sound satisfying specific conditions can be added as a harmony sound to each reference sound based on the temporal relationship between the acquisition time of each chord information and the acquisition time of the pitch information of each reference sound Determining whether or not
When it is determined that the specific sound can be added, harmony information including pitch information of the specific sound is generated, and when it is determined that the specific sound cannot be added, the pitch of the specific sound is determined. Generating harmony information without information, and
The harmony information generation method, wherein the specific condition is that it is included in at least one scale among a plurality of scales that can be used for corresponding code information and is not included in at least one other scale.

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