JP2006267342A - Musical sound controller and musical sound control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a musical sound controller capable of quickly controlling musical sounds corresponding to the pitch of an inputted musical sound and a musical sound control program. <P>SOLUTION: In the case that the number M of performance errors is 0 (S11:Yes), a sound source 11 is controlled so as to start the generation of the musical sounds by the pitch indicated by note information indicated by a pointer and a tone indicated by tone information stored corresponding to the note information (S12), and a sound generation completion flag indicating that the generation of the musical sounds is started is set. Then, the pointer indicating a performance position is advanced to the next note information (S14), and the string vibration start processing is ended. Thereafter, the pitch of the inputted musical sound is periodically detected by a DSP 10, and whether or not the performance position is correct is judged on the basis of the pitch. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a musical sound control apparatus and a musical sound control program that generate musical sounds according to the performance of a performer.

  Conventionally, there has been known an electronic musical instrument called a guitar synthesizer or a bass synthesizer that detects the pitch (pitch) or level of a musical sound generated by a stringed instrument or the like and generates a new musical sound according to the detected pitch or level. Yes.

  Japanese Unexamined Patent Publication No. 2000-105590 (Patent Document 1) discloses a bass synthesizer that detects the pitch of string vibration and generates a new musical tone having a pitch corresponding to the detected pitch.

  In addition, in an effect adding device that adds reverberation to a musical tone or changes the frequency characteristics of a musical tone, the pitch of the input musical tone is detected, and an effect according to the detected pitch is applied to the input musical tone. What to grant is known.

Japanese Patent Laid-Open No. 6-4076 (Patent Document 2) detects and changes the frequency characteristics of a cyclic filter by detecting the pitch of an input musical tone and setting a delay time according to the detected pitch. An effect imparting device that can be used is disclosed.
JP 2000-105590 A JP-A-6-4076

  However, the electronic musical instrument described in Patent Document 1 has a problem that it takes time to detect an accurate pitch after a string is played, and the generation of new musical sounds is delayed. In particular, when detecting the pitch of a musical tone having a low pitch, such as a bass, it is difficult to quickly and accurately detect the pitch because of the long waveform period.

  In addition, the effect applying device described in Patent Document 2 detects the pitch of an input musical tone, and detects an accurate pitch when setting the mode of the effect to be applied according to the detected pitch. There is a problem in that it takes time to do so, and there is a delay in the time from when the musical sound is input until the effect of the appropriate mode is applied.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a musical tone control apparatus and a musical tone control program that can quickly perform musical tone control according to the pitch of an inputted musical tone. It is said.

  In order to solve the above-mentioned problem, a musical tone control apparatus according to claim 1 includes an input means for inputting a musical tone, a pitch detecting means for detecting a pitch of a musical tone input by the input means, and a pitch detection thereof. Control means for controlling the musical tone generating means so as to generate a new musical tone based on the pitch detected by the means, and storing note information indicating a series of predetermined pitches Storage means, and performance position detection means for detecting a performance position for the series of note information by referring to the note information stored in the storage means based on the pitch detected by the pitch detection means; Musical tone input detecting means for detecting that a musical sound is input by the input means, and the control means detects the performance position when the musical sound input detecting means detects that a musical sound has been input. Generation of a musical tone is started at the pitch indicated by the note information set at the performance position detected by the stage, and when the pitch is detected by the pitch detector, the pitch is detected by the pitch detector The musical tone generating means is controlled to change the pitch of the musical tone that is being generated based on the pitch.

  The musical tone control apparatus according to claim 2 is the musical tone control apparatus according to claim 1, wherein the storage means stores musical note information indicating a series of predetermined pitches and musical tones having pitches indicated by the musical note information. Timbre information indicating a timbre is stored, and the control means is set to the performance position detected by the performance position detection means when it is detected that the music sound is input by the music sound input detection means. When tone generation starts with the pitch indicated by the note information and the tone indicated by the tone color information, and the pitch is detected by the pitch detection means, it is generated based on the pitch detected by the pitch detection means. The musical tone generating means is controlled to change the pitch of the middle musical tone.

  The musical tone control apparatus according to claim 3, wherein an effect is given to the musical sound inputted by the input means, the pitch detecting means for detecting the pitch of the musical tone inputted by the input means, and the input means. And a control means for controlling the mode of the effect imparted to the musical tone by the effect imparting means on the basis of the pitch detected by the pitch detecting means, a series of predetermined predetermined Storage means for storing note information for instructing a pitch, and a performance position for the series of note information by referring to the note information stored in the storage means based on the pitch detected by the pitch detection means And a musical tone input detecting means for detecting that a musical tone has been inputted by the input means, and the control means receives a musical tone by the musical tone input detecting means. Is detected, the effect is applied in a manner corresponding to the pitch indicated by the note information set at the performance position detected by the performance position detection means, and the pitch is detected by the pitch detection means. In such a case, the effect imparting means is controlled so as to impart an effect in a manner corresponding to the detected pitch.

  The musical tone control program according to claim 4 includes: an input step for inputting a musical tone; a pitch detecting step for detecting a pitch of a musical tone input by the input step; and a pitch detected by the pitch detecting step. And a control step for controlling the tone generation means so as to generate a new tone based on the pitch, and a series of predetermined pitches based on the pitch detected by the pitch detection step. A performance position detecting step for detecting a performance position with respect to the series of note information by referring to the note information stored in a storage means for storing note information for indicating a musical note; and detecting that a musical sound has been input from the input step A musical sound input detecting step, and when the controlling step detects that a musical sound has been input by the musical sound input detecting step, When a musical tone starts to be generated at the pitch indicated by the note information set at the performance position detected in the position detection step, and the pitch is detected in the pitch detection step, it is detected in the pitch detection step. The musical tone generating means is controlled so as to change the pitch of the musical tone that is being generated based on the generated pitch.

  The musical tone control program according to claim 5 is the musical tone control program according to claim 4, wherein the storage means stores a series of musical note information indicating a predetermined pitch and a musical tone having a pitch indicated by the musical note information. Timbre information for instructing a timbre is stored, and the control step is set to a performance position detected by the performance position detection step when it is detected that a musical sound is input by the musical sound input detection step. When a musical tone starts to be generated with the pitch indicated by the note information and the tone indicated by the tone information, and the pitch is detected by the pitch detection step, the tone is generated based on the pitch detected by the pitch detection step. The musical tone generating means is controlled to change the pitch of the middle musical tone.

  The musical tone control program according to claim 6 includes an input step for inputting a musical tone, a pitch detecting step for detecting a pitch of the musical tone input by the input step, and a pitch detected by the pitch detecting step. Based on the pitch detected by the pitch detection step, and a control step for controlling the mode of the effect imparted by the effect imparting means to the musical sound input based on the input step. A musical position is generated by a performance position detecting step for detecting a performance position for the series of note information by referring to the note information stored in a storage means for storing note information for instructing a predetermined pitch, and the input step. A musical sound input detecting step for detecting that the musical sound has been input, wherein the control step is configured to input a musical sound by the musical sound input detecting step. Is applied in an aspect corresponding to the pitch indicated by the note information set at the performance position detected by the performance position detection step, and the pitch is detected by the pitch detection step. In such a case, the effect imparting means is controlled so as to impart an effect in a manner corresponding to the detected pitch.

  According to the musical tone control apparatus of the first aspect, the storage means stores note information indicating a series of predetermined pitches, and the performance position detection means is based on the pitch detected by the pitch detection means. The performance position for a series of note information is detected by referring to the note information stored in the storage means, the tone input detection means detects that a tone has been input to the input means, and the control means detects the tone input. When it is detected that a musical tone has been input by the means, the generation of a musical tone is started at the pitch indicated by the note information set at the performance position detected by the performance position detecting means, and the pitch is detected by the pitch detecting means. Is detected, the musical sound generating means is controlled so as to change the pitch of the musical sound being generated based on the pitch detected by the pitch detecting means.

  Therefore, even if it takes time to detect the pitch of the input musical tone, the generation of the musical tone is started at the pitch based on the note information simply by detecting the input of the musical tone. Therefore, it is possible to prevent the delay of the start of the generation of the musical sound and to start the generation of the musical sound quickly. Further, since the pitch at which the musical tone starts to be generated is a pitch based on the note information stored at the performance position, there is a high possibility that the musical tone is generated at the correct pitch.

  According to the musical tone control apparatus according to claim 2, in addition to the effect produced by the musical tone control apparatus according to claim 1, the storage means is instructed by the musical note information indicating a series of predetermined pitches and the musical note information. Timbre information for instructing the timbre of the musical tone of the pitch is stored, and when the control means detects that a musical sound has been input by the musical sound input detection means, it is set to the performance position detected by the performance position detection means. If the musical tone starts to be generated with the pitch indicated by the note information being played and the tone indicated by the tone information, and the pitch is detected by the pitch detection means, it is generated based on the pitch detected by the pitch detection means. The musical tone generating means is controlled so as to change the pitch of the middle musical tone.

  Therefore, even if it takes time to detect the pitch of the input musical tone, the generation of the musical tone is started quickly at the pitch based on the note information simply by detecting the input of the musical tone. And the timbre assigned to the note.

  According to the musical tone control apparatus of claim 3, the storage means stores note information indicating a series of predetermined pitches, and the performance position detection means is based on the pitch detected by the pitch detection means. A performance position for a series of note information is detected by referring to the note information stored in the storage means, the tone input detection means detects that a tone has been input by the input means, and the control means detects a tone input detection When it is detected that a musical sound has been input by the means, an effect is given in a manner corresponding to the pitch indicated by the note information set at the performance position detected by the performance position detection means, and the pitch detection means When the pitch is detected, the effect applying means is controlled so as to apply the effect in a manner corresponding to the detected pitch.

  Therefore, even if it takes time to detect the pitch of the input musical tone, the effect of the aspect corresponding to the pitch based on the note information is detected only by detecting that the musical tone is input. The delay of giving an effect can be prevented.

  According to the musical tone control program of claim 4, the performance position detecting step is stored in the storage means for storing note information indicating a series of predetermined pitches based on the pitch detected by the pitch detecting step. Referring to the recorded note information, the performance position for the series of note information is detected, the musical sound input detection step detects that a musical sound has been input from the input step, and the control step detects the musical sound by the musical sound input detection step. When it is detected that the input has been made, the musical tone starts to be generated at the pitch indicated by the note information set at the performance position detected by the performance position detection step, and the pitch is detected by the pitch detection step. In this case, the musical tone generating means is controlled so as to change the pitch of the musical tone being generated based on the pitch detected by the pitch detecting step.

  Therefore, even if it takes time to detect the pitch of the input musical tone, the generation of the musical tone is started at the pitch based on the note information simply by detecting the input of the musical tone. Therefore, it is possible to prevent the delay of the start of the generation of the musical sound and start the generation of the musical sound quickly. Further, since the pitch at which the musical tone starts to be generated is a pitch based on the note information stored at the performance position, there is a high possibility that the musical tone is generated at the correct pitch.

  According to the musical tone control program of the fifth aspect, in addition to the effect produced by the musical tone control program according to the fourth aspect, the storage means is instructed by the musical note information indicating a series of predetermined pitches and the musical note information. Timbre information for instructing the timbre of the musical tone of the pitch is stored, and the control step is set to the performance position detected by the performance position detection step when it is detected that the musical sound is input by the musical sound input detection step. If tone generation is started with the pitch indicated by the note information and the tone indicated by the tone information, and the pitch is detected by the pitch detection step, the tone is generated based on the pitch detected by the pitch detection step. The musical tone generating means is controlled so as to change the pitch of the middle musical tone. Therefore, even if it takes time to detect the pitch of the input musical tone, the generation of the musical tone is started quickly at the pitch based on the note information simply by detecting the input of the musical tone. And the timbre assigned to the note.

  According to the musical tone control program of claim 6, the performance position detecting step is stored in the storage means for storing note information indicating a series of predetermined pitches based on the pitch detected by the pitch detecting step. The performance position for the series of note information is detected by referring to the recorded note information, the musical sound input detection step detects that a musical sound has been input by the input step, and the control step detects the musical sound by the musical sound input detection step. When input is detected, the effect is applied in a manner corresponding to the pitch indicated by the note information set at the performance position detected by the performance position detection step, and the pitch is detected by the pitch detection step. If it is, the effect imparting means is controlled so that the effect is imparted in a manner corresponding to the detected pitch.

  Therefore, even if it takes time to detect the pitch of the input musical tone, the effect of the aspect corresponding to the pitch based on the note information is detected only by detecting that the musical tone is input. The delay of giving an effect can be prevented.

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

  The electronic musical instrument 1 includes a CPU 2 (central processing unit), a ROM 3 (read-only memory) that stores a control program executed by the CPU 2, a work memory area when the CPU 2 executes the control program, and the like. A RAM 4 (random access memory) to be provided; an external storage device 5 in which a card-type storage medium such as a flash memory can be detachably attached; an operator 6 for giving instructions to the electronic musical instrument 1 by the performer; A display 7 for displaying parameters set by the operation element 6, a pickup 8 for converting the vibration of a string such as an electric guitar into an electric signal, and the electric signal converted by the pickup 8 are digitalized at a predetermined sampling period. The A / D converter 9 that converts the signal into a signal, and the pitch and level of the digital signal converted by the A / D converter 9 are detected. The DSP 10, the tone generator 11 that generates a tone signal corresponding to the performance information transmitted by the CPU 2, the amplifier 12 (amplifier) that amplifies the tone generated by the tone generator 11, and the tone that is amplified by the amplifier 12 The speaker 13 emits sound.

  When the CPU 2 detects that the electric guitar or the like is played and the string starts to vibrate, the CPU 2 stores the note information corresponding to the performance position of the score information stored in the RAM 4 and the corresponding note information. When the tone generator 11 is read out and the tone generator 11 is controlled to start generating a musical tone with the tone indicated by the note information and the tone indicated by the tone information, and the tone of the string vibration is detected, the tone is generated. The sound source 11 is controlled so that the pitch of the musical sound is corrected to the detected pitch.

  The ROM 3 stores a control program for performing the processes shown in the flowcharts of FIGS. 3, 4, and 5, various constants, and the like. In addition to the working memory area, the RAM 4 is provided with a score information memory 4a and a note-on buffer 4b.

  The musical score information memory 4a transfers and stores the musical score information corresponding to the music selected by the performer from the musical score information corresponding to the plurality of musical songs stored in the card-type memory attached to the external storage device 5. Is done. The note-on buffer 4b is an area for storing note-on messages. The note-on message is a message indicating that a key on the keyboard defined by the MIDI standard has been pressed, and is hereinafter abbreviated as note-on. A message indicating that a key on the keyboard has been released is a note-off message, and is hereinafter abbreviated as note-off.

  When the pitch of the vibration of the string is detected from the DSP 10, the CPU 2 receives a notification of the pitch and the level of the string vibration, and obtains the note number corresponding to the pitch and the velocity corresponding to the detected level. Generate note-on. Further, when the DSP 10 receives a notification that the tone level has fallen below a predetermined value, it generates a note-off for that note number.

  In the note-on buffer 4b, when the note-on occurs, the performance position is searched, and when the performance is wrong, that is, when the performance position cannot be specified, the note-on is stored. The maximum number of note-ons stored in the note-on buffer 4b is determined in advance as N. When more than N errors occur, the oldest note-on is erased from the note-on buffer 4b, and the newly generated note-on is stored.

  In addition, the RAM 4 stores a sounded flag indicating a musical sound generation state. This sounded flag is set to 1 when the sound source 11 is generating a musical sound, and is set to 0 when the generation of a musical sound is stopped.

  The external storage device 5 is equipped with a card-type memory, and uses musical note information for instructing the generation and stop of a series of musical sounds corresponding to a musical piece stored in the card-type memory, timbre information for instructing musical tone colors, and the like It reads and writes musical score information.

  Prior to the performance, the performer selects a desired song from the card-type memory mounted in the external storage device 5, and the performer plays the song. The musical score information corresponding to the selected song is read by the external storage device 5 and transferred to the RAM 4.

  The operation element 6 is a volume or switch for setting various parameters, and an operation element for selecting any one of a plurality of performance songs stored in a card-type memory mounted in the external storage device 5, It has controls such as a switch for selecting a timbre or a rotary encoder, and can set the timbre of a musical tone generated by the sound source 11. It is possible to imitate a musical instrument that can generate a plurality of musical sounds at the same time, such as a piano or a guitar, or a musical instrument that cannot generate a plurality of sounds at the same time, such as a wind instrument.

  The DSP 10 is a digital signal processing circuit (Digital Signal Processor), stores programs corresponding to various processes in the DSP 10, and executes these programs to thereby input a level of musical sounds such as string vibrations inputted. If the level exceeds a predetermined value, the CPU 2 is notified that the input of a musical tone has been started. If the level is detected to be lower than the predetermined value, the musical tone is input. The CPU 2 is notified that it has been stopped. Further, when a musical tone is input, the pitch of the musical tone input every predetermined time is detected, and when the pitch can be detected, the CPU 2 detects the detected pitch value. To be notified.

  Next, the score information will be described with reference to FIG. FIG. 2 shows an example of data constituting the score information. The musical score information is also called so-called automatic performance data and has note information and timbre information.

  The note information and the timbre information are stored in the order in which the performance is performed. One note information includes a time indicating the time when note-on occurs and a note number indicating the pitch indicated by the note-on (in the MIDI standard, the center number). C is defined as 60), a velocity indicating the key-on speed of the note-on, and a gate time which is a time from the occurrence of the note-on to the occurrence of the note-off corresponding to the note-on Is remembered. Note that the time indicates the time when note-on of note information is generated with the time when note-on of note information at the beginning of the musical score information is set to 0.

  Here, the unit of time representing time and gate time is a tick. The tick is a time interval corresponding to the tempo value, and is a time obtained by dividing the time length of one beat specified by the tempo value by a predetermined value (for example, 24). The tempo value is expressed in beats per minute (abbreviated as beat per minute, referred to as bpm). For example, if the tempo value is 120 bpm, the length of one beat is 500 msec, and dividing this by 24 gives one tick of 20.83 msec.

  In the musical score information, timbre information indicating the timbre of the musical tone generated by the musical note information is stored corresponding to each musical note information. This timbre information is a program change defined by the MIDI standard. These timbre information is, for example, the timbre used for crescendo performance where the volume gradually increases, the timbre used for deccrescendo performance where the volume gradually decreases, or the pitch gradually increases or decreases. Specifies the tone used for portamento performances that fall, the tone used for staccato performances with short gate times, and the normal tone used for general performances that are not the special performance methods described above. To do. The sound source 11 is configured so as to be able to generate musical tones corresponding to these timbre information.

  Next, a main process executed by the CPU 2 will be described with reference to FIG. FIG. 3 is a flowchart showing the main process, which is a process executed until the electronic musical instrument 1 is turned on after being turned on. First, initialization processing is performed (S1). In this initialization process, the sounded flag indicating the tone generation state is set to 0 (hereinafter referred to as reset, and the flag is set to 1), the note-on buffer 4b is cleared, and the performance is performed. Processing such as clearing the error number M to 0 is performed.

  When the note-on occurs, the number of performance errors M is compared with the pitch indicated by the note-on and the note number indicated by the pointer information indicated by the pointer. And the number of note-ons stored in it. The performance error number M is a value stored in a predetermined area of the RAM 4.

  In this embodiment, it is assumed that any one of the pieces of musical score information stored in the card-type memory attached to the external storage device 5 is selected by the performer. When a song is selected, a pointer indicating the performance position is set in the first note information of the song.

  Next to the initialization process, it is determined whether or not an operation for selecting a timbre has been performed (S2). When a timbre is selected (S2: Yes), a timbre setting process is performed (S3). The tone color setting process is, for example, a process of transmitting a program change corresponding to the type of tone color set for the sound source 11.

  In the process of S2, if no timbre setting is performed (S2: No) or if the timbre setting process of S3 is performed, it is next determined whether or not a musical tone is input from the pickup 8 (S4). ). When the DSP 10 monitors the digital signal converted by the A / D converter 9 and detects that a signal indicating string vibration is input from the absence of input (start of string vibration), the input is input to the CPU 2. It is to notify that there was. When the start of vibration is detected (S4: Yes), string vibration start processing is performed (S5). This string vibration start process will be described later with reference to FIG.

  If the string vibration has not started in the process of S4 (S4: No) or the string vibration start process of S5 has been performed, it is next determined whether any of the strings has stopped vibrating. (S6). The DSP 10 monitors the digital signal converted by the A / D converter 9 and notifies the CPU 2 of the stop of vibration when detecting that any of the strings has stopped from vibrating. . When the stop of the vibration is detected (S6: Yes), a note-off corresponding to the vibration of the string is generated, and the note-off is transmitted to the sound source 11 so that the generation of the musical tone is stopped to stop the generation of the musical sound (S7).

  In the process of S6, when the string vibration is not stopped (S6: No), or when the string vibration stop process of S7 is performed, other processes are performed next and the process returns to S2. The other processing is processing such as processing according to an operation detected by detecting an operation other than the above-described operation.

  Next, the string vibration start process in S5 will be described with reference to FIG. FIG. 4 is a flowchart showing the string vibration start process. First, it is determined whether or not the performance error number M is 0 (S11). If the performance error number M is 0 (S11: Yes), generation of a musical tone is started with the pitch stored in the note information indicated by the pointer and the tone indicated by the tone information corresponding to the note information. The sound source 11 is controlled (S12), and a sounded flag indicating that the generation of a musical sound has been started is set. Next, the pointer indicating the performance position is advanced to the next note information (S14), and the string vibration start process is terminated. The detected performance position is advanced by 1 in the process of S14, when the input of a musical sound is detected, based on the note information set at the performance position next to the note information set at the previously detected performance position. This is because the generation of musical sounds begins.

  On the other hand, if it is determined that the performance error number M is not 0 in the process of S11 (S11: No), the performance error number M is a value obtained by subtracting 1 from the maximum value N of the number of note-ons stored in the note-on buffer 4b. It is determined whether it is smaller (S15).

  If the performance error number M is smaller than the value N-1 (S15: Yes), 1 is added to the value of M (S16), the sounded flag is reset (S17), and this string vibration start process is terminated. If the performance error number M is not smaller than N-1 (S15: No), the sounded flag is reset by the process of S17 without performing the process of S16, and this string vibration start process is terminated.

  Therefore, in this string vibration start process, before the pitch of the string vibration is detected, the tone is stored with the pitch stored in the note information set at the performance position and the tone indicated by the tone information. The sound source 11 is controlled to start generation. However, if the performance error number M is not 0, no musical sound is generated.

  Next, the pitch detection process will be described with reference to FIG. In this pitch detection process, the DSP 10 periodically detects the pitch, and when the pitch is detected, the DSP 10 transmits the detected pitch value to the CPU 2. In the pitch detection processing, the string vibration is irregular immediately after the string vibration is started, and it takes time to accurately detect the period. In particular, when the pitch of string vibration is low, it takes a long time to detect an accurate pitch with a long period.

  Therefore, the pitch detection process is executed when the vibration of the string is started and then the accurate pitch is detected by the pitch detection means. FIG. 5 is a flowchart showing a pitch detection process executed by the CPU 2.

  First, it is determined whether or not the sounded flag stored in the RAM 4 is set to 1 (S21). If the sounded flag is set to 1 (S21: Yes), the sound source 11 is controlled to change the pitch of the musical sound generated by the sound source 11 to the pitch detected by the DSP 10 (S22). . This control is performed by transmitting pitch bend information defined by the MIDI standard.

  Therefore, even if the pitch detected after starting the generation of a musical tone at the pitch indicated by the note information set at the performance position is different from the pitch indicated by the note information, the detected pitch depends on the detected pitch. By controlling the generation of the musical tone, the pitch of the musical tone being generated can be corrected to the pitch actually played.

  Next, it is determined whether the performance error number M is 0 (S23). When the performance error number M is 0 (S23: Yes), the pitch detected by the DSP 10 is compared with the pitch stored in the note information immediately before the note information indicated by the pointer (S24). ). In this comparison, if the difference between the pitch detected by the DSP 10 and the pitch stored in the note information immediately before the note information indicated by the pointer is within a half semitone (50 cents), It is determined that the position is correct (S25: Yes), and this pitch detection process is terminated.

  When the difference from the pitch stored in the note information immediately before the note information indicated by the musical score information pointer is not within ½ semitone, it is determined that the performance position does not match (S25: No). The performance error number M is set to 1, note-on of the note number corresponding to the pitch detected by the DSP 10 is stored in the note-on buffer 4b (S27), and the pitch detection process is terminated.

  On the other hand, if it is determined in S21 that the sounded flag is not set to 1 (S21: No), the sounded flag is set (S30), and the performance error number M is stored in the note-on buffer 4b. It is determined whether or not the value is smaller than a value obtained by subtracting 1 from the maximum value N of the number of note-ons (S31). When the performance error number M is smaller than the value obtained by subtracting 1 from N (S31: Yes), 1 is added to the performance error number M (S32), and a musical tone is generated with the normal tone and the pitch detected by the DSP 10. Thus, the sound source 11 is controlled (S33), and the process proceeds to S27.

  If the performance error number M is not smaller than the value obtained by subtracting 1 from N in the determination process of S31 (S31: No), the note-on generated this time is stored in the note-on buffer 4b, and the performance position is searched. . The search of the performance position is to detect which position of the musical score information is played based on the N note-on note numbers stored in the note-on buffer 4b. As the method, a known method disclosed in Japanese Patent Application Laid-Open No. 2001-184059 can be used. In such a method, there are a case where the performance position can be specified and a case where the performance position cannot be specified.

  If the performance position can be specified (S35: Yes), the performance error number M is set to 0 (S36), and the note-on buffer 4b is cleared (S37). Further, the sound source 11 is controlled so as to be generated at the pitch at which the musical tone of the note information corresponding to the specified performance position is detected (S38), and the note information next to the performance position from which the pointer indicating the performance position is detected. (S39), and the pitch detection process is terminated.

  If the performance position cannot be specified in the determination process of S35, the sound source 11 is controlled to generate a musical tone with the normal tone color and the pitch detected by the DSP 10 (S40), and this pitch detection process is performed. finish. If N note numbers are already stored in the note-on buffer 4b in the process of S34, the oldest stored note number is deleted and the newly generated note number is stored.

  As described above, according to the first embodiment, the pitch of the vibration of the guitar string is detected, and the sound source is controlled so as to newly generate a musical tone having a pitch corresponding to the detected pitch. When the musical tone control device detects that a new string vibration has started, it specifies the performance position for the note information and starts the generation of a musical tone at the pitch indicated by the note information corresponding to the specified performance position. When the pitch of string vibration is detected after that, control is performed to change the pitch of the musical sound to the detected pitch. Therefore, even when it takes time to detect the pitch of the string vibration, it is possible to generate a musical sound at the time of detecting the string vibration, and prevent the start of the musical sound from being delayed. Can do.

  In addition, when the performance position for the note information can be specified, the musical tone is generated with the tone indicated by the tone color information stored corresponding to the note information, so the performer needs to perform an operation for setting the tone. There is no performance operation.

  Next, a musical tone control apparatus according to the second embodiment will be described with reference to FIGS. The same parts as those of the musical tone control apparatus according to the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. Only different parts will be described.

  The second embodiment shows a form in which the musical sound control device of the present invention is mounted on an effect device that imparts an effect to the input musical sound. Similar to the first embodiment, the input musical sound is shown in FIG. , And an effect corresponding to the detected pitch is given to the input musical sound. The type of effect corresponding to this pitch is the effect of applying a filter with a frequency corresponding to the pitch to the input signal, such as a comb filter that emphasizes the fundamental wave and its harmonics, and the fundamental wave and harmonics. There are sideband filters that control the waveforms present in the sidebands.

  FIG. 6 is a block diagram showing an electrical configuration of the effect device 20 having the musical tone control device according to the second embodiment. The effect device 20 includes a CPU 2 (central processing unit), a ROM 3 storing a control program, a RAM 4 providing a working memory area, an external storage device 5 to which a storage medium can be detachably mounted, a performance An operator 6 for giving an instruction to the effect device 20, a display 7 for displaying parameters, an input terminal 14 for inputting an electric signal output from a microphone, an electric guitar, or the like, and an input to the input terminal 14 An A / D converter 9 that converts an electrical signal into a digital signal at a predetermined sampling period, and detects the pitch and level of the digital signal converted by the A / D converter 9 and is effective for the input digital signal , DSP 12 for amplifying the musical sound to which the effect is imparted by DSP 10, and the musical sound amplified by the amplifier 12 are emitted It is constituted by a speaker 13 that.

  The ROM 3 stores a control program for performing the processes shown in the flowcharts of FIGS. 7, 8, and 9, various constants, and the like. In addition to the working memory area, the RAM 4 is provided with a score information memory 4a and a note-on buffer 4b. These score information memory 4a and note-on buffer 4b are the same as those in the first embodiment. Further, the RAM 4 stores a pitch confirmation flag indicating the final state of the pitch of the input musical sound. This pitch confirmation flag is set to 1 when the pitch of the input musical tone is confirmed, and is set to 0 when the pitch cannot be confirmed.

  As in the first embodiment, the DSP 10 monitors the level of the input musical tone such as the string vibration, and if it detects that the level exceeds a predetermined value, it indicates that the input of the musical tone to the CPU 2 has started. When the notification is made and the level is detected to be lower than the predetermined value, the CPU 2 is notified that the input of the musical sound has been stopped. Further, when a musical tone is input, the pitch of the musical tone input every predetermined time is detected, and when the pitch can be detected, the CPU 2 detects the detected pitch value. To be notified. Furthermore, a predetermined effect is given to the input musical sound and the result is output to the amplifier 12. The output of the DSP 10 may be converted into an analog signal by a D / A converter (not shown) and supplied to the analog amplifier 12. If the amplifier 12 is a digital amplifier, the D / A converter is Is not necessary.

  In the second embodiment, in the musical score information shown in FIG. 2, it is assumed that timbre information specifying a timbre is not stored, but effect type information indicating the type of effect is stored instead of the timbre information, The type of effect imparted by the DSP may be set based on this information.

  Next, a main process executed by the CPU 2 provided in the effect device 20 will be described with reference to FIG. FIG. 7 is a flowchart showing the main process, and is a process executed until the effect device 20 is turned on and then shut off. First, initialization processing is performed (S41). As this initialization processing, processing such as resetting the pitch confirmation flag, clearing the note-on buffer 4b, and setting the number of performance errors M to 0 is performed.

  In this embodiment, it is assumed that any one of the pieces of musical score information stored in the card-type memory attached to the external storage device 5 is selected by the performer. When a song is selected, a pointer indicating the performance position is set in the first musical score information of the song.

  Following the initialization process, it is determined whether or not an operation for selecting the type of effect has been performed (S42). When an effect is selected (S42: Yes), an effect setting process is performed (S43). The effect setting process is, for example, a process of transmitting an effect processing program corresponding to the type of effect set for the DSP 10.

  In the process of S42, when the effect setting is not performed (S42: No) or when the sound effect color setting process of S43 is performed, it is next determined whether or not a musical sound is input from the input terminal 14. (S44). The DSP 10 monitors the digital signal converted by the A / D converter 9 and notifies the CPU 2 that there is an input when detecting that the signal has been input from a state where there is no input. When the start of input is detected (S44: Yes), signal input start processing is performed (S45). This signal input start process will be described later with reference to FIG.

  In the process of S44, when the input has not started (S44: No), or when the signal input start process of S45 is performed, it is next determined whether or not the input is stopped (S46). The DSP 10 monitors the digital signal converted by the A / D converter 9 and notifies the CPU 2 of the stop of vibration when detecting that the input has stopped from a state where the input exists. When stop of input is detected (S46: Yes), signal input stop processing such as resetting the pitch determination flag is performed (S47).

  In the process of S46, when the input is not stopped (S46: No) or when the signal input stop process of S47 is performed, other processes are performed next and the process returns to S42. The other processing is processing according to the operation detected by detecting that an operation device other than the above-described operation device is operated.

  Next, the signal input start process in S45 will be described with reference to FIG. FIG. 8 is a flowchart showing signal input start processing. First, it is determined whether or not the performance error number M is 0 (S51). When the note-on occurs, the number of performance errors M is compared with the pitch indicated by the note-on and the note number indicated by the pointer information indicated by the pointer. And the number of note-ons stored in it.

  If the performance error number M is 0 (S51: Yes), the DSP 10 is controlled so as to give an effect to the musical tone input in the effect mode corresponding to the pitch stored in the note information indicated by the pointer. (S52) A pitch confirmation flag, which is a flag indicating that the pitch has been confirmed, is set (S53). Note that this pitch determination flag is a flag stored in a predetermined area of the RAM 4. Next, the pointer indicating the performance position is advanced to the next note information (S54), and this signal input start process is terminated. The detected performance position is advanced by 1 in the process of S54. When the input of a musical sound is detected, the musical note information set at the performance position next to the musical note information set at the previously detected performance position is added. It is because an effect is provided based on.

  On the other hand, if it is determined in the process of S51 that the performance error number M is not 0 (S51: No), the performance error number M is smaller than a value obtained by subtracting 1 from the maximum note-on value N stored in the note-on buffer 4b. Whether or not (S55).

  If the performance error number M is smaller than the value N-1 (S55: Yes), 1 is added to the value of M (S56), and an instruction is sent to the DSP 10 to give an effect corresponding to a predetermined pitch (S57). ). The effect corresponding to the predetermined pitch is an effect imparted to a musical tone having a predetermined pitch because the pitch of the input musical tone is unknown, and is set in advance. The predetermined pitch may be, for example, a pitch having the highest appearance frequency among musical notes of a musical piece to be played. Next, the pitch confirmation flag is reset (S58), and this signal input start process is terminated. If the performance error number M is not smaller than N−1 (S55: No), the process proceeds to S57 without performing S56.

  Next, the pitch detection process will be described with reference to FIG. In this pitch detection process, when the pitch is periodically detected by the DSP 10, and the pitch is detected, the detected pitch value is transmitted from the DSP 10 to the CPU 2, and the pitch value is set. This process is executed by the CPU 2 when it is received. FIG. 9 is a flowchart showing the pitch detection process.

  First, the DSP 10 is instructed to change the effect characteristics according to the detected pitch (S61). Therefore, even if the pitch detected after applying the effect in a manner corresponding to the pitch indicated by the note information set at the performance position is different from the pitch indicated by the note information, By controlling the application of the effect according to the effect, the effect being applied can be corrected to an effect of a mode corresponding to the actually played pitch.

  Next, it is determined whether or not the pitch determination flag is set to 1 (S62). If the pitch confirmation flag is set to 1 (S62: Yes), it is determined whether or not the performance error number M is 0. If the performance error number M is not 0 (S63: No), the pitch detection process is terminated. If the performance error number M is 0, the pitch indicated by the pitch detected by the DSP 10 and the score are displayed. The pitch stored in the note information immediately before the note information indicated by the information pointer is compared (S64). In this comparison, the difference between the pitch indicated by the pitch detected by the DSP 10 and the pitch stored in the note information immediately before the note information indicated by the musical score information pointer is ½ semitone (50 cents). ), It is determined that the performance position is correct (S65: Yes), and the pitch detection process is terminated.

  When the difference from the pitch stored in the note information immediately before the note information indicated by the musical score information pointer is not within half a semitone, it is determined that the performance position does not match (S65: No). The performance error number M is set to 1 (S66), note-on corresponding to the pitch and level detected by the DSP 10 is stored in the note-on buffer 4b (S67), and the pitch detection process is terminated.

  On the other hand, if the pitch determination flag is not set to 1 in the determination process of S62 (S62: No), the pitch determination flag is set (S70), and the performance error number M is then stored in the note-on buffer 4b. It is determined whether or not it is smaller than a value obtained by subtracting 1 from the maximum value N of the number of stored note-ons (S71). If the performance error number M is smaller than the value obtained by subtracting 1 from N (S71: Yes), 1 is added to the performance error number M (S72), and the process proceeds to S67.

  If the performance error number M is not smaller than the value obtained by subtracting 1 from N (S71: No), the performance position is searched (S73). This search for the performance position is executed in the same manner as in the first embodiment.

  If the performance position can be specified by this performance position search (S74: Yes), the performance error number M is set to 0 (S75), and the note-on buffer 4b is cleared (S76). Further, the pointer indicating the performance position is set to the note information next to the detected performance position (S77), and the pitch detection process is terminated.

  As described above, according to the second embodiment, the pitch of the input signal is detected, and the effect device that controls to apply the effect to the input musical sound according to the detected pitch. When the musical tone control device detects that a new input has been started, it specifies the performance position for the note information, and gives an effect to the musical tone at the pitch indicated by the note information corresponding to the specified performance position. Thereafter, when the pitch of the input signal is detected, control is performed so as to provide an effect corresponding to the detected pitch. Therefore, even when it takes time to detect the pitch of the input signal, it is possible to provide an effect at the time when the input is detected, and to prevent the start of the effect from being delayed. .

  The performance position detecting means according to claim 1 corresponds to the processes of S24, S25, S34, and S35 of the flowchart shown in FIG. 5, and the musical tone input detecting means corresponds to the process of S4 shown in FIG. The control means corresponds to the process of the flowchart shown in FIG. 4 and the process of the flowchart shown in FIG.

  The performance position detecting means according to claim 3 corresponds to the processes of S64, S65 and S73, S74 in the flowchart shown in FIG. 9, and the musical tone input detecting means corresponds to the process of S44 in the flowchart shown in FIG. The control means corresponds to the process of the flowchart shown in FIG. 8 and the process of the flowchart shown in FIG.

  The performance position detection step according to claim 4 corresponds to the processing of S24, S25, S34, and S35 of the flowchart shown in FIG. 5, and the musical sound input detection step corresponds to the processing of S4 shown in FIG. The control step corresponds to the process of the flowchart shown in FIG. 4 and the process of the flowchart shown in FIG.

  The performance position detection step according to claim 6 corresponds to the processing of S64, S65 and S73, S74 of the flowchart shown in FIG. 9, and the musical sound input detection step corresponds to the processing of S44 of the flowchart shown in FIG. The control step corresponds to the process of the flowchart shown in FIG. 8 and the process of the flowchart shown in FIG.

  As described above, the present invention has been described based on the embodiments, but the present invention is not limited to the above-described embodiments, and various improvements and modifications can be easily made without departing from the spirit of the present invention. It can be guessed.

  For example, in the first embodiment, the operation element 6 and the sound source 11 are connected to the CPU 2 via the bus, but may be connected via an interface such as MIDI.

  In the first and second embodiments, the performer selects a desired song from the score information of a plurality of songs stored in a storage medium attached to the external storage device 5. When a performer performs, the note information of a plurality of songs may be searched, and a song having note information that matches the performance information may be selected from the plurality of songs. In this case, since a predetermined number of pieces of performance information are required to specify a song, in the first embodiment, a musical tone is generated with a predetermined tone (normal tone) until the song can be specified. If the song can be specified, it is preferable to generate a musical tone with the tone set at the performance position of the song. In the second embodiment, until the song can be specified, If the effect can be given in a predetermined manner and the music can be specified, the effect should be given in a manner according to the pitch set at the performance position of the music.

  In the first and second embodiments, the performer performs in the same key as that of the music stored as the score information. However, if the performer performs in a different key, the performer performs. A key designating unit for designating a key to be played by the person may be provided, and the performance position may be detected based on the pitch of the key specified by the key designating unit and the key of the score information.

  Also, in the first and second embodiments, when searching for a performance position, if the pitch of some notes is wrong, if some notes are skipped and played, notes not included in the score information Even when a minor performance mistake is made, such as when playing the, a DP matching method that can accurately search the search position may be used.

  In the first and second embodiments, note-on is stored as note information, but a note number may be used instead of note-on. As note information, the time at which a note-on occurs and the gate time of that note are stored. However, for the purpose of merely detecting the performance position, the time and gate time may not be stored. Good.

  In the first and second embodiments, when the performance position is searched, the pitch indicated by the note-on is collated. However, the timing at which the note-on occurs and the gate time are also collated. It may be.

  In the first and second embodiments, the musical tone control program is stored in the ROM 3 of the electronic musical instrument 1, but is supplied via a storage medium attached to the external storage device 5 or the Internet. The program may be stored in the RAM 4 and executed, or may be executed by a personal computer.

  In the first and second embodiments, the pitch detection process is performed by the DSP 10, but the DSP 10 notifies the CPU 2 of the time of zero crossing or peak of the input waveform, and the CPU 2 detects the pitch. The pitch may be detected by executing a program.

It is a block diagram which shows the electric constitution of the electronic musical instrument in 1st Embodiment carrying the musical tone control apparatus by this invention. It is a figure which shows the data which comprise musical score information. It is a flowchart which shows a main process. It is a flowchart which shows a string vibration start process. It is a flowchart which shows a pitch detection process. It is a block diagram which shows the electric constitution of the effect apparatus in 2nd Embodiment. It is a flowchart which shows the main process in 2nd Embodiment. It is a flowchart which shows the signal input start process in 2nd Embodiment. It is a flowchart which shows the pitch detection process in 2nd Embodiment.

Explanation of symbols

1 Electronic musical instrument 2 CPU
3 ROM
4 RAM
4a Musical score information memory (storage means)
4b Note-on buffer 6 Controller 8 Pickup (input means)
10 DSP (pitch detection means, effect imparting means)
11 Sound source (musical sound generation means)
14 Input terminal (input means)
20 Effect devices

Claims (6)

An input means for inputting a musical sound, a pitch detecting means for detecting the pitch of the musical sound input by the input means, and a new musical tone is generated based on the pitch detected by the pitch detecting means. In a musical sound control device comprising control means for controlling the musical sound generating means
Storage means for storing note information indicating a series of predetermined pitches;
A performance position detection means for detecting a performance position for the series of note information by referring to the note information stored in the storage means based on the pitch detected by the pitch detection means;
A musical sound input detecting means for detecting that a musical sound has been input by the input means,
When the control means detects that a musical sound has been input by the musical sound input detection means, the control means generates a musical sound at the pitch indicated by the note information set at the performance position detected by the performance position detection means. When the pitch is detected by the pitch detector, the musical tone generator is controlled to change the pitch of the musical tone that is being generated based on the pitch detected by the pitch detector A musical sound control device characterized by that.   The storage means stores note information indicating a series of predetermined pitches, and timbre information indicating a tone color of a musical tone having a pitch indicated by the note information, and the control means detects the tone input detection When it is detected that a musical sound is input by the means, the generation of the musical sound is started with the pitch indicated by the note information set at the performance position detected by the performance position detection means and the timbre indicated by the timbre information, When the pitch is detected by the pitch detector, the musical tone generator is controlled so as to change the pitch of the musical tone that is being generated based on the pitch detected by the pitch detector. 2. The musical tone control apparatus according to claim 1, wherein the musical tone control apparatus is provided. Input means for inputting a musical sound, pitch detecting means for detecting the pitch of a musical sound input by the input means, effect applying means for applying an effect to the musical sound input by the input means, and the pitch detection A musical sound control device comprising: control means for controlling the mode of the effect imparted to the musical sound by the effect imparting means based on the pitch detected by the means;
Storage means for storing note information indicating a series of predetermined pitches;
A performance position detecting means for detecting a performance position for the series of note information by referring to the note information stored in the storage means based on the pitch detected by the pitch detection means;
A musical sound input detecting means for detecting that a musical sound has been input by the input means,
When the control means detects that a musical sound has been input by the musical sound input detection means, the control means has a mode according to the pitch indicated by the note information set at the performance position detected by the performance position detection means. When an effect is applied and the pitch is detected by the pitch detecting means, the effect providing means is controlled so as to give an effect in a manner corresponding to the detected pitch. Musical sound control device. An input step for inputting a musical tone, a pitch detecting step for detecting the pitch of the musical tone input by the input step, and a new musical tone is generated based on the pitch detected by the pitch detecting step. A musical sound control program comprising a control step for controlling the musical sound generating means
Based on the pitch detected by the pitch detection step, the performance position for the series of note information by referring to the note information stored in the storage means for storing the note information indicating a series of predetermined pitches A performance position detecting step for detecting
A musical sound input detection step for detecting that a musical sound has been input from the input step,
When the control step detects that a musical tone has been input by the musical tone input detection step, the control step generates a musical tone at a pitch indicated by the note information set at the performance position detected by the performance position detection step. And when the pitch is detected by the pitch detection step, the musical tone generation means is controlled to change the pitch of the musical tone being generated based on the pitch detected by the pitch detection step. A musical sound control program characterized by   The storage means stores note information that indicates a series of predetermined pitches, and tone information that indicates the tone of a musical tone having a pitch indicated by the note information, and the control step includes detecting the tone input When it is detected that a musical tone is input in step, the generation of musical tone is started with the pitch indicated by the note information set at the performance position detected by the performance position detection step and the tone color indicated by the tone color information, When the pitch is detected by the pitch detection step, the musical tone generation means is controlled to change the pitch of the musical tone being generated based on the pitch detected by the pitch detection step. 5. The musical tone control program according to claim 4, wherein the musical tone control program is provided. An input step for inputting a musical tone, a pitch detecting step for detecting the pitch of the musical tone input by the input step, and a musical tone input by the input step based on the pitch detected by the pitch detecting step A musical sound control program comprising a control step for controlling the mode of the effect imparted by the effect imparting means.
Based on the pitch detected by the pitch detection step, the performance position for the series of note information by referring to the note information stored in the storage means for storing the note information indicating a series of predetermined pitches A performance position detecting step for detecting
A musical tone input detecting step for detecting that a musical tone has been input by the input step, and when the controlling step detects that a musical tone has been input by the musical tone input detecting step, the performance position detecting step; The effect is applied in a manner corresponding to the pitch indicated by the note information set at the performance position detected by the step, and when the pitch is detected by the pitch detection step, the pitch is detected according to the detected pitch. A musical tone control program for controlling the effect applying means so as to give an effect in an aspect.

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