JP2009053464A - Musical sound generator and electronic musical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To generate musical sound closer to the actual played sounds of stringed instruments. <P>SOLUTION: An electronic musical instrument 10 is provided with a waveform memory 31 for storing a string waveform data group 33 including string waveform data obtained by plucking strings of a stringed instrument or vibrating them with a bow and an open string waveform data group 32, including open string waveform data obtained, by making each string vibrate in an open string state by making the stringed instrument body vibrate; a key touch sounding circuit 25 for reading out prescribed string waveform data from the string waveform data group 33, based on given sound pitch to generate musical sound waveform data; an open string sounding circuit 26 for reading out open string waveform data for a prescribed open string from the open string waveform data, based on the given sound pitch to generate open string waveform synthesis data obtained by combining the open string waveform data being read out; and an adder 30 for adding the musical sound waveform data and the open string waveform combined data. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a musical tone generation apparatus and an electronic musical instrument that can generate musical tones of string instruments.

  An electronic musical instrument having a keyboard can generate musical tones of stringed instruments such as guitars and violins. An actual stringed instrument has a plurality of strings, the pitch of the string is determined by pressing the string at a desired position and making contact with the fingerboard, and the string is hit with a finger or a pick, or a bow By rubbing, etc., a musical tone with a predetermined pitch is emitted. Moreover, in the guitar, there are not only playing by picking but also a unique playing method such as a stroke playing method. Various ideas have been made to generate the tone color of a stringed instrument having such characteristics.

  For example, in Patent Document 1, a string corresponding to the key is specified by pressing a predetermined key with the high pitch range of the keyboard as the string designation key range, and the low pitch side is set as the pitch designation key range. The pitch to be pronounced with the specified string is specified. As a result, it is possible to realize an operation peculiar to a stringed instrument to specify a string to be generated and its pitch, and to reproduce a state closer to the sounding form of the stringed instrument.

Further, Patent Document 2 stores a fret position for each chord so that a chord corresponding to the depressed key is pronounced with the same string and pitch as in the case of actually playing a guitar. An electronic musical instrument capable of this is disclosed.
JP-A-8-146955 JP 2000-163066 A

  As described above, it is desirable to generate a musical sound that more closely approximates the timbre of a real stringed instrument by reproducing the sound generation pattern unique to the stringed instrument. However, in a conventional electronic musical instrument, although only a string and its pitch are specified, only a musical sound in a state where the string is vibrated is generated. When a stringed instrument is actually played, strings other than strings struck with fingers or picks or rubbed with a bow vibrate slightly and emit sound.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a musical sound generating apparatus and an electronic musical instrument that can generate a musical sound that is closer to the performance sound of an actual stringed instrument by adding a musical sound due to vibration of an open string.

The present invention relates to a string waveform data group including string waveform data obtained by vibrating a string of a stringed instrument with a string or a bow, and open string waveform data obtained by vibrating each stringed instrument body in an open string state. An open string waveform data group including a waveform memory storing
A key-press sound generation means for reading predetermined string waveform data from the string waveform data group stored in the waveform memory based on a pitch based on a key depression of a keyboard and generating musical tone waveform data of the pitch; ,
Based on the pitch, the open string waveform synthesis is performed by reading open string waveform data of a predetermined open string from the open string waveform data group stored in the waveform memory and synthesizing the read open string waveform data. Open string pronunciation means for generating data;
This is achieved by a musical sound generating device comprising addition means for adding the musical sound waveform data and the open string waveform synthesis data.

In a preferred embodiment, the open string sounding means is
The pitch of the first open string ≦ the pitch based on the key depression <the first open string that satisfies the pitch of the high-pitched open string adjacent to the first open string A second open string lower than the first open string is specified, and open string waveform data corresponding to each of the second open strings is read out.

In a preferred embodiment, the open string waveform data group includes open string n-fold waveform data which is waveform data of n-th harmonics of each open string waveform data,
The open string sounding means reads the open string waveform data of the predetermined open string and the open string n-fold sound waveform data of the nth harmonic of the predetermined open string, and the read open string waveform data and open string n are read out. Synthesizes double waveform data.

  In another preferred embodiment, the open string sound generation means generates and reads open string n-fold sound waveform data corresponding to the n-th overtone of the open string based on the read open string waveform data. The open string waveform data and the generated open string n-fold waveform data are synthesized.

In still another preferred embodiment, the string waveform data group includes string waveform data obtained by vibrating each open string of a stringed instrument with a string or a bow,
The key-press sounding means is
A pitch of the first open string ≦ a pitch based on the key depression <a first open string that satisfies the pitch of the open string on the high pitch side adjacent to the first open string is identified and specified. The string waveform data corresponding to the first open string is read out.

  Further, the object of the present invention is achieved by an electronic musical instrument comprising the above-described musical tone generating device and a keyboard.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the musical sound production | generation apparatus and electronic musical instrument which can produce | generate the musical sound closer to the performance sound of an actual stringed instrument by adding the musical sound by vibration of an open string.

  Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a block diagram showing the configuration of the electronic musical instrument according to the first embodiment of the present invention.

  As shown in FIG. 1, the electronic musical instrument 10 according to the present embodiment includes a keyboard 12, a CPU 14, a ROM 16, a RAM 18, a musical tone generator 20, and an operator group 22. The keyboard 12, the CPU 14, the ROM 16, the RAM 18, the musical tone generator 20 and the operator group 22 are connected via a bus 24. The tone generation unit 20 includes a key-press sound generation circuit 25, an open string sound generation circuit 26, and an acoustic system 27.

  The keyboard 12 can transmit to the CPU 14 information specifying the key that has been pressed and information indicating the velocity of the key that has been pressed, in accordance with the player's key pressing operation.

  The CPU 14 controls the system and generates various kinds of information to be given to the musical tone generation unit 20 for generating musical tones with a pitch corresponding to the pressed key. The ROM 16 stores a program, constants used when the program is executed, waveform data that is the basis of musical sound waveform data generated by the musical sound generation unit 20, and the like. The RAM 18 temporarily stores variables, parameters, input data, output data, and the like necessary in the course of program execution.

  FIG. 2 is a block diagram showing an example of an open string tone generation circuit and a key press tone generation circuit of the musical tone generation unit according to the present embodiment, and components related thereto.

  As will be described in detail later, the key pressing sound generation circuit 25 generates a musical tone having the pitch of the key pressed on the keyboard 12. Here, in order to generate the musical tone of a stringed instrument, it is determined which string fret is pressed based on the pitch of the key pressed, and the interval between the fret is pressed. It is configured to read the string waveform data of possible strings and generate tone data. Further, the open string sound generation circuit 26 generates open string waveform data corresponding to a string that vibrates in the open string state and emits sound with a string other than the string that is actually sounding.

  As shown in FIG. 2, the timbre information and the tone generation key press information are given from the CPU 14 to the key press generation circuit 25. The CPU 14 provides tone color information and open string tone generation information to the open string generation circuit 26. The timbre information is generated by the CPU 14 in response to the player operating the operators in the operator group 22. In the present embodiment, the timbre information indicates one of guitar-type timbres such as “acoustic guitar” and “electric guitar”.

  Further, according to the key pressed on the keyboard 12, the CPU 14 generates key press sound generation information and open string sound generation information, and outputs them to the key press sound generation circuit 25 and the open string sound generation circuit 26, respectively. Therefore, the CPU 14 and the key-press sounding circuit 25 correspond to a key-press sounding means, and the CPU 14 and the open string sounding circuit 26 correspond to an open string sounding means.

  FIG. 3 is a block diagram showing the configuration of the key-press sound generation circuit and the open string sound generation circuit. As shown in FIG. 3, the key pressing sound generation circuit 25 includes a waveform reproduction circuit 34, an envelope generation circuit 35, and a multiplication circuit 36. The open string sound generation circuit 26 also includes a waveform reproduction circuit 37, an envelope generation circuit 38 and a multiplication circuit 39. The waveform reproduction circuit 34 of the key depression sound generation circuit 25 reads the string waveform data according to the key depression sound generation information from the string waveform data group 33 of the waveform memory 31.

  Here, in the present embodiment, in order to generate a guitar tone, the string waveform data group 33 is a waveform data obtained by vibrating each of the six strings of the guitar with an open string. It includes certain first string waveform data to sixth string waveform data. The waveform memory 31 is realized by the ROM 16, for example.

  The first string waveform data is the waveform data obtained by vibrating the first string (E4) with an open string, and the second string waveform data is obtained by vibrating the second string (B3) with an open string. The waveform data, the third string waveform data, the waveform data obtained by vibrating the third string (G3) with an open string, and the fourth string waveform data, the fourth string (D3) with an open string. The 5th string data is the waveform data of the 5th string (A2) opened and the 6th string (E2) is opened. This is waveform data that is vibrated with a string.

  The waveform reproduction circuit 34 of the key-press sound generation circuit 25 reads any one of the string waveform data from the first string waveform data to the sixth string waveform data from the waveform memory 31, and presses the key-press based on the read string waveform data. Musical tone waveform data of a pitch according to the pitch information included in the pronunciation signal is generated. The envelope generation circuit 35 generates time-varying envelope data to be given to the multiplication circuit 36 in accordance with the velocity information included in the key depression sound generation information.

  The multiplication circuit 36 multiplies the musical sound waveform data and the envelope data, and outputs the musical sound waveform data to which the envelope is added.

  The waveform reproduction circuit 37 of the open string sound generation circuit 26 reads open string waveform data according to the open string sound information from the open string waveform data group 32 of the waveform memory 31.

  In the present embodiment, the open string waveform data group 32 uses, as the open string waveform data, the waveform of the vibration of the strings associated with the vibration of the guitar body, rather than by striking, for each of the five strings of the guitar. keeping. The open string waveform data group 32 includes the second string open string waveform data that is the resonance sound of the second string (B3), the third string open string waveform data that is the resonance sound of the third string (G3), and the fourth string ( The fourth string open string waveform data which is the resonance sound of D3), the fifth string open string waveform data which is the resonance sound of the fifth string (A2), and the sixth string which is the resonance sound of the sixth string (E2). Has open string waveform data.

  The waveform reproduction circuit 37 of the open string sound generation circuit 26 reads any open string waveform data from the second string open string waveform data to the sixth string open string waveform data from the waveform memory 31. The envelope generation circuit 38 generates time-varying velocity data to be given to the multiplication circuit 39 according to the velocity included in the open string pronunciation information.

  The multiplication circuit 39 multiplies the open string waveform data by the velocity data, and outputs the open string waveform data to which the velocity is added. When a plurality of open string data are read, the open string sound generation circuit 26 adds the open string waveform data to which the velocity is added, and outputs the added waveform data (open string waveform synthesis data).

  As shown in FIG. 2, the musical sound waveform data output from the key depression sound generation circuit 25 and the open string waveform synthesis data output from the open string sound generation circuit 26 are added by the adder 30 and output from the adder 30. The synthesized data is provided to the acoustic system 27.

  Hereinafter, generation of the key press sound generation information and the open string sound generation information in the CPU 14 will be described.

  When actually playing the guitar, the performer determines the pitch by holding the string with the left hand at an appropriate position between the frets. The strings of the guitar are arranged in the order of the first string, the second string, ... from the bottom when performing, and the left hand of the performer extends the finger from the lower side and bends the finger to the desired string. Hold the string at the position between the frets. Therefore, of the strings other than the strings that are actually struck with a finger or pick, the strings that are higher than the string that is struck (that is, the lower string) are in contact with the finger of the left hand, etc. There are many cases. Therefore, the vibration sound from these strings is not emitted. This tendency is particularly remarkable in the case of chord playing. In the present embodiment, in consideration of the form of guitar performance in this way, the string of the string that is struck and the string of the open string that emits sound by vibration are identified, and the key press pronunciation information including the information of the identified string And open string pronunciation information.

  FIG. 4 and FIG. 5 are flowcharts showing an example of generation processing of key-pressed pronunciation information and open string pronunciation information according to the present embodiment. When a key on the keyboard is pressed by the performer, key pressing information including the pitch and velocity of the pressed key is given to the CPU 14.

  When the CPU 14 accepts the key pressing information (step 401), the CPU 14 checks the pitch included in the key pressing information and determines whether the pitch is E4 or more (step 402). That the pitch is E4 or more means that the lowermost first string is struck at the time of performance. Therefore, when it is determined Yes in step 402, the CPU 14 performs the strings existing above the first string at the time of performance (second string: B3, third string: G3, fourth string: D3, fifth string : Open string pronunciation information including information indicating A2 and 6th string: E2) is generated (step 403). Note that the open string pronunciation information may include information indicating the string of the open string, or may include information indicating the pitch of the open string.

  Further, since the first string is struck, the CPU 14 generates key press sound generation information including information indicating the first string (step 404). Note that the key press sounding information includes information specifying a string (in the above-described step 404, “information indicating the first string” corresponds to this) and information indicating the pitch to be actually generated (this is: Corresponding to the pitch included in the key pressing information).

  When it is determined No in step 402, the CPU 14 determines whether or not the pitch is B3 or more (step 405). A pitch of B3 or higher means that the second string located second from the bottom is being struck during performance. Therefore, if it is determined Yes in step 405, the CPU 14 performs the strings that exist above the second string at the time of performance (third string: G2, fourth string: D3, fifth string: A2, and sixth string). : Open string pronunciation information including information indicating E2) is generated (step 406).

  Further, since the second string is struck, the CPU 14 generates key press sound generation information including information indicating the second string (step 407).

  When it is determined No in step 405, the CPU 14 determines whether the pitch is G3 or more (step 408). A pitch of G3 or higher means that the third string located third from the bottom is being struck during performance. Therefore, if it is determined Yes in step 408, the CPU 14 indicates information indicating the strings (fourth string: D3, fifth string: A1, and sixth string: E2) that exist above the third string during performance. Open string pronunciation information including is generated (step 409).

  Further, since the third string is struck, the CPU 14 generates key press sound generation information including information indicating the third string (step 410).

  When it is determined No in step 408, the CPU 14 determines whether or not the pitch is D3 or more (step 501). When the pitch is D3 or more, it means that the fourth string located fourth from the bottom is struck during performance. Therefore, when it is determined Yes in step 501, the CPU 14 releases the open string pronunciation information including information indicating the strings (fifth string: A2 and sixth string: E2) existing above the fourth string at the time of performance. Is generated (step 502).

  Further, since the fourth string is struck, the CPU 14 generates key depression sound generation information including information indicating the fourth string (step 503).

  When it is determined No in step 501, the CPU 14 determines whether or not the pitch is A2 or more (step 504). That the pitch is A2 or more means that the fifth string located fifth from the bottom is struck at the time of performance. Therefore, when it is determined Yes in step 504, the CPU 14 generates open string pronunciation information including information indicating a string (sixth string: E2) existing above the fifth string at the time of performance (step 505). ).

  Further, since the fifth string is struck, the CPU 14 generates key press sound generation information including information indicating the fifth string (step 506).

  If it is determined No in step 504, it means that the sixth string located at the top at the time of performance is struck. Therefore, in this case, open string pronunciation information is not generated. Since the sixth string is struck, the CPU 14 generates key depression sound generation information including information indicating the sixth string (step 507).

  The CPU 14 outputs key press sound generation information including information specifying the string, information indicating the pitch to be generated, and velocity information to the key press sound generation circuit 25 (step 508). Further, the CPU 14 outputs open string sound generation information including information indicating strings and velocity information to the open string sound generation circuit 26 (step 509).

In the processing of FIGS. 4 and 5, the following logic is followed. The CPU 14 specifies the first open string such that the pitch of the first open string ≦ the pitch based on the key depression <the pitch of the high-side open string adjacent to the first open string. The information indicating the first open string is information included in the key press sound generation information.

  In addition, the CPU 14 specifies a second open string that is lower than the first open string. Information indicating the second open string is information included in the open string pronunciation information.

  On the basis of the key depression sound generation information and the open string sound generation information generated in this way, the musical tone waveform data and the open string waveform data are generated in the key depression sound generation circuit 25 and the open string sound generation circuit 26 described above. The operation of the open string tone generation circuit 26 will be described again.

  As described with reference to FIGS. 4 and 5, the open string pronunciation information may include information indicating a plurality of strings. For example, if the pitch of the depressed key is E4 or higher, the open string pronunciation information includes information indicating five strings from the second string to the sixth string, and the pitch of the depressed key is Is B3 or more and less than E4, the open string pronunciation information includes information indicating four strings from the third string to the sixth string. When the open string sound generation information includes information indicating a plurality of strings, the waveform reproduction circuit 37 of the open string sound generation circuit 26 receives a plurality of open string waveform data (from the open string waveform data group 32 of the waveform memory 31). If the 2nd string to the 6th string, the 2nd string open string waveform data to the 6th string open string waveform data) are read out, and the plurality of read open string waveform data are added to obtain the open string waveform synthesis data. Generate and output.

  The key-pressed sound generation information includes information indicating strings and information indicating pitches to be sounded. Therefore, the waveform reproduction circuit 34 of the key-pressing tone generation circuit 25 selects one of the string waveform data from the first string waveform data to the sixth string waveform data of the string waveform data group 33 of the waveform memory 31 according to the information indicating the strings. , And the musical tone waveform data of the pitch to be generated is generated from the read string waveform data. As a result, it is possible to obtain a musical sound that is almost equivalent to that produced by pressing between the frets.

  According to the present embodiment, the waveform memory includes a string waveform data group including string waveform data obtained by vibrating a string of a stringed instrument with a string or a bow, and each string in an open string state by vibrating the stringed instrument body. Open string waveform data group including the open string waveform data that has been vibrated, and the open string sound generation circuit reads the open string waveform data of a predetermined open string and combines the open string waveform data with the open string waveform data. Generate. As a result, not only the musical sound generated by striking the string with a pick or finger, or by drawing the string with a bow, but also the musical sound of other open strings generated by the vibration of the stringed instrument body is added. It is possible to generate a musical sound close to the performance sound of an actual stringed instrument.

Moreover, according to the present embodiment,
A first open string is specified such that the pitch of the first open string ≦ the pitch based on the key press <the pitch of the open string on the high pitch side adjacent to the first open string, A second open string lower than the first open string is specified, and open string sound generation information including information indicating the second open string is supplied to the open string sound generation circuit 26. The open string tone generation circuit 26 reads open string waveform data based on the open string tone generation information, synthesizes the read open string waveform data, and generates open string waveform synthesis data. As a result, it is possible to generate a vibration sound of an open string in accordance with the performance form of an actual stringed instrument.

Moreover, according to the present embodiment,
The first open string is specified such that the pitch of the first open string ≦ the pitch based on the key press <the pitch of the open string on the high pitch side adjacent to the first open string, Key press sound generation information including information indicating an open string is given to the key press sound generation circuit 25. The key-press sound generation circuit 25 reads open string waveform data of an open string according to the key-press sound generation information from the waveform memory, and generates a musical tone waveform having a predetermined pitch. As a result, it is possible to generate a musical sound that approximates a musical sound that is actually generated by a player's string striking or vibrating with a bow.

  Next, a second embodiment of the present invention will be described. In the first embodiment, a guitar tone color tone is generated. In the second embodiment, a violin tone color is generated.

  The second embodiment also has a key depression sound generation circuit 125 and an open string sound generation circuit 126. The musical tone waveform data output from the key press sound generation circuit 125 and the open string waveform synthesis output from the open string sound generation circuit 126 are also provided. The data is added in the adder 30 and the synthesized data is provided to the acoustic system 20.

  FIG. 6 is a block diagram showing the configuration of the key-press sounding circuit and the open string sounding circuit according to the second embodiment. As shown in FIG. 6, the key pressing sound generation circuit 125 includes a waveform reproduction circuit 134, an envelope generation circuit 135, and a multiplication circuit 136. The open string sound generation circuit 126 also includes a waveform reproduction circuit 137, an envelope generation circuit 138, and a multiplication circuit 139. The waveform reproduction circuit 134 of the key pressing sound generation circuit 125 reads waveform data according to the key pressing sound generation information from the string waveform data group 133 of the waveform memory 131.

  Here, in the present embodiment, in order to generate a violin tone, the string waveform data group 133 is string waveform data obtained by vibrating each of the four strings of the violin with an open string using a bow. Includes E-line waveform data to G-line waveform data. The E-line waveform data is the waveform data obtained by vibrating the E-line (E5) with an open string, and the A-line data is the waveform data obtained by vibrating the A-line (A4) with an open string and the D-line waveform data is The waveform data obtained by vibrating the D line (D4) with an open string with a bow and the G line waveform data are waveform data obtained by vibrating the G line (G3) with an open string with a bow.

  Further, in the present embodiment, the waveform memory 131 holds, as an open string waveform data group 132, waveforms generated by the vibration of the strings accompanying the vibration of the violin body instead of vibrating by the bow. The open string waveform data group 32 includes A line open string waveform data that is A line resonance sound, A line double sound waveform data and A line quadruple sound waveform data that are the second and fourth harmonics thereof, and D line resonance sound. D-line open string waveform data, D-line double-sound waveform data and D-line quadruple-sound waveform data that are the second and fourth harmonics thereof, and D-line open string waveform data that is the resonance sound of the G-line, its second harmonic and It has G-line 2nd sound waveform data and G-line 4th sound waveform data which are 4th harmonics.

  When actually playing the violin, the performer presses the string with a left hand in a predetermined position, contacts the string with the fingerboard to determine the pitch, and vibrates the string with bow hair. Here, when viewed from the performer, the strings become higher from the left in the order of G-line, D-line, A-line, and E-line, and the finger holding the string extends from the right side of the fingerboard to the left side as viewed from the performer. . Therefore, of the strings other than the strings held by the performer, the string on the higher pitch side than the string vibrated by the bow (the string on the right side as viewed from the performer) is in contact with the finger of the left hand, etc. There are many. Therefore, no resonance sound is emitted from these strings. Therefore, in the second embodiment, appropriate open string pronunciation information is generated in consideration of the form of violin performance.

  FIG. 7 is a flowchart illustrating an example of a generation process of key press sound generation information and open string sound generation information according to the second embodiment. When a key on the keyboard is pressed by the performer, key pressing information including the pitch and velocity of the pressed key is given to the CPU 14.

  When the CPU 14 accepts the key depression information (step 701), the CPU 14 checks the pitch included in the key depression information and determines whether the pitch is E5 or more (step 702). A pitch of E5 or higher means that the E line located on the rightmost side when viewed from the performer is vibrated by the bow. Therefore, if it is determined Yes in step 702, the CPU 14 indicates the strings (A line: A4, D line: D4, and G line: G3) that exist on the right side when viewed from the performer from the E line during performance. Open string pronunciation information including the information is generated (step 703).

  Further, since the E line is vibrated by the bow, the CPU 14 generates key press sound generation information including information indicating the E line (step 704).

  When it is determined No in step 702, the CPU 14 determines whether or not the pitch is A4 or more (step 705). A pitch of A4 or higher means that the A line located second from the right when viewed from the performer is vibrated by the bow during performance. Therefore, when it is determined Yes in step 705, the CPU 14 is an open string including information indicating strings (D line: D4 and G line: G3) existing on the right side when viewed from the performer from the A line during performance. Pronunciation information is generated (step 706).

  Further, since the A line is vibrated by the bow, the CPU 14 generates key press sound generation information including information indicating the A line (step 707).

  When it is determined No in step 705, the CPU 14 determines whether or not the pitch is D4 or more (step 708). A pitch of D4 or more means that the D line located third from the right when viewed from the performer is vibrated by the bow during performance. Therefore, if it is determined Yes in step 708, the CPU 14 generates open string pronunciation information including information indicating a string (G line: G3) existing on the right side as viewed from the performer from the D line during performance. (Step 709).

  Further, since the G line is vibrated by the bow, the CPU 14 generates key press sound generation information including information indicating the G line (step 710).

  The determination of No in step 708 means that the G line located on the leftmost side when viewed from the performer is vibrated by the bow. Therefore, in this case, open string pronunciation information is not generated. Since the G line is vibrated by the bow, the CPU 14 generates key press sound generation information including information indicating the G line (step 711).

  The CPU 14 outputs key press sound generation information including information specifying the string, information indicating the pitch to be sounded, and velocity information to the key press sound generation circuit 125 (step 712). Further, the CPU 14 outputs open string sound generation information including information indicating strings and velocity information to the open string sound generation circuit 126 (step 712).

  The open string pronunciation information may include information indicating a plurality of strings. For example, if the pitch of the pressed key is E5 or higher, the open string pronunciation information includes information indicating three strings of A line, D line, and G line, and the sound of the pressed key If the height is A4 or more and less than E5, the open string pronunciation information includes information indicating two strings, D line and G line.

  The waveform reproduction circuit 137 of the open string sound generation circuit 126 reads the open string waveform data of the string, the double sound waveform data of the string, and the quadruple sound waveform data based on the information indicating the string included in the open string sound information. To synthesize the waveform data. When the open string sound generation information includes information indicating a plurality of strings, the waveform reproduction circuit 137 of the open string sound generation circuit 126 receives a plurality of open string waveform data (A line, D) from the open string waveform data group 32. If it is a line or a G line, the A line open string waveform data, the D line open string waveform data, and the G line open string waveform data), and the respective double sound waveform data and quadruple sound waveform data are read and read. A plurality of open string waveform data, double sound waveform data, and quadruple sound waveform data are added, and open string waveform synthesis data obtained by the addition is output.

  The key-pressed sound generation information includes information indicating strings and information indicating pitches to be sounded. Therefore, the waveform reproduction circuit 134 of the key depression sound generation circuit 125 selects any one of the E-line waveform data, the A-line waveform data, the D-line waveform data, and the G-line waveform data of the string waveform data group 133 according to the information indicating the strings. The string waveform data is read out, and tone waveform data of a pitch to be generated is generated from the read string waveform data. As a result, it is possible to obtain a musical tone that is almost the same as that obtained when the performer holds the string in contact with the fingerboard and vibrates the string with the bow.

  According to the second embodiment, the open string sound generation circuit converts the n-th harmonic (for example, second overtone, 4th harmonic) into the open string waveform data obtained by vibrating each string instrument body in the open string state by vibrating the stringed instrument body. Overtone) waveform data is added to generate open string waveform synthesis data. As a result, it is possible to generate a musical sound that is closer to the performance sound of a real stringed instrument.

  The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

  For example, in the first embodiment, in order to generate a musical tone of a guitar tone, the waveform memory includes first string waveform data to sixth string waveform data, and second string open string waveform data to second string. 6-string open string waveform data is stored, and the key-press sound generation circuit reads predetermined string waveform data from the first string waveform data to the sixth string waveform data, and the open string sound generation circuit reads the second string open string waveform. Predetermined open string waveform data is read out from data to sixth string open string waveform data.

  However, it goes without saying that it is also possible to generate musical tones such as violins. When generating a musical tone of a violin tone, the waveform memory stores E-line waveform data, A-line waveform data, D-line waveform data, G-line waveform data, A-line open string waveform data, and D-line open string waveform. Data and G-line open string waveform data are stored, and a key-pressing sound generation circuit reads out predetermined string waveform data from the E-line waveform data, A-line waveform data, D-line waveform data, and G-line waveform data. If the sound generation circuit reads predetermined open string waveform data from the A-line open string waveform data, D-line open string waveform data, and G-line open string waveform data, and generates musical tone waveform data and open string waveform synthesis data, respectively. Good.

  In the second embodiment, it is also possible to generate a musical tone waveform of a guitar tone. In this case, the waveform memory stores the second harmonic waveform data and the fourth harmonic waveform data of each open string waveform data as the open string waveform data, and the open string sound generation circuit, along with the open string waveform data, The waveform data of the second harmonic and the waveform data of the fourth harmonic may be read.

  Furthermore, in the second embodiment, the waveform memory stores the open string waveform data, the waveform data of the second harmonic and the waveform data of the fourth harmonic, but is limited to such a configuration. It is not a thing. For example, only the open string waveform data is stored in the waveform memory, and the waveform reproduction circuit 137 reads out predetermined open string waveform data, and based on the read open string waveform data, the waveform data of the second overtone and The fourth harmonic waveform data may be generated, and the open string waveform data, the second harmonic waveform data, and the fourth harmonic waveform data may be synthesized. By adopting such a configuration, the amount of open string waveform data to be stored in the waveform memory can be reduced.

  In the second embodiment, the second harmonic waveform data and the fourth harmonic waveform data of the open string waveform data are added to the open string waveform data, but harmonic data other than the second harmonic and the fourth harmonic are added. You may comprise so that it may add. For example, harmonic overtone data of n overtones (n is an integer) may be stored in the waveform memory or generated and added to the open string waveform data.

FIG. 1 is a block diagram showing the configuration of the electronic musical instrument according to the first embodiment of the present invention. FIG. 2 is a block diagram showing an example of an open string tone generation circuit and a key press tone generation circuit of the musical tone generation unit according to the present embodiment, and components related thereto. FIG. 3 is a block diagram showing the configuration of the key-press sounding circuit and the open string sounding circuit according to this embodiment. FIG. 4 is a flowchart showing an example of generation processing of key press sound generation information and open string sound generation information according to the present embodiment. FIG. 5 is a flowchart showing an example of the key press sounding information and open string sounding information generation processing according to the present embodiment. FIG. 6 is a block diagram showing the configuration of the key-press sounding circuit and the open string sounding circuit according to the second embodiment. FIG. 7 is a flowchart illustrating an example of a generation process of key press sound generation information and open string sound generation information according to the second embodiment.

Explanation of symbols

10 Electronic musical instrument 12 Keyboard 14 CPU
16 ROM
18 RAM
DESCRIPTION OF SYMBOLS 20 Musical sound production | generation part 22 Operation element group 24 Damper pedal 25 Key press sound generation circuit 26 Open string sound generation circuit 27 Acoustic system 30 Adder 31 Waveform memory 32 Open string waveform data 33 String waveform data 34, 37 Waveform reproduction circuit 35, 38 Envelope generation circuit 36, 39 multiplication circuit

Claims (6)

An open string waveform that includes string waveform data that includes string waveform data obtained by vibrating a stringed instrument with a string or a bow, and open string waveform data that causes each string to vibrate in an open string state by vibrating the stringed instrument body. A waveform memory storing data groups;
A key-press sound generation means for reading predetermined string waveform data from the string waveform data group stored in the waveform memory based on a pitch based on a key depression of a keyboard and generating musical tone waveform data of the pitch; ,
Based on the pitch, the open string waveform synthesis is performed by reading open string waveform data of a predetermined open string from the open string waveform data group stored in the waveform memory and synthesizing the read open string waveform data. Open string pronunciation means for generating data;
An apparatus for generating a musical sound, comprising: addition means for adding the musical sound waveform data and the open string waveform synthesis data. The open string pronunciation means,
The pitch of the first open string ≦ the pitch based on the key depression <the first open string that satisfies the pitch of the high-pitched open string adjacent to the first open string 2. A musical tone generating apparatus according to claim 1, wherein a second open string on a lower side than the first open string is specified, and open string waveform data corresponding to each of the second open strings is read out. The open string waveform data group includes open string n-fold waveform data that is waveform data of n-th harmonics of each open string waveform data;
The open string sounding means reads the open string waveform data of the predetermined open string and the open string n-fold sound waveform data of the nth harmonic of the predetermined open string, and the read open string waveform data and open string n are read out. 3. The musical tone generating apparatus according to claim 1, wherein the harmonic wave shape data is synthesized.   Based on the read open string waveform data, the open string sound generation means generates open string n-fold sound waveform data corresponding to the nth harmonic of the open string, and the read open string waveform data and the generated 3. The musical tone generating apparatus according to claim 1, wherein the open string n-fold sound waveform data is synthesized. The string waveform data group includes string waveform data in which each open string of a stringed instrument is vibrated by a string or a bow,
The key-press sounding means is
A pitch of the first open string ≦ a pitch based on the key depression <a first open string that satisfies the pitch of the open string on the high pitch side adjacent to the first open string is identified and specified. 5. A musical tone generating apparatus according to claim 1, wherein the string waveform data corresponding to the first open string is read out. A musical sound generating device according to any one of claims 1 to 5,
The keyboard,
An electronic musical instrument characterized by comprising:

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