KR0181483B1 - Composition method of midi data and chorus data - Google Patents

Abstract

The present invention relates to a half-cycle of computer music, and to provide a method of synthesizing midi data and chorus data, by which a chorus function is provided to synthesize a midi music performance and a chorus performance simultaneously. The method of synthesizing the MIDI data and the chorus data includes searching for whether a tick signal for generating a beat of music is generated, decreasing a unique MIDI duration value set for each song according to the tick signal, and Searching for whether the reduced MIDI duration value matches a predetermined reference value; transmitting MIDI data stored in a MIDI data buffer to the SIO when the reduced MIDI duration value matches the reference value; Reducing a unique chorus duration value set for each song according to a signal; comparing whether the reduced chorus duration value matches a set reference value; and reducing the chorus duration value that is decreased in the comparison process. When sending chorus data stored in chorus data buffer to PIO And synthesizing the MIDI data output from the SIO and the chorus data output from the PIO in a mixer.

Description

Synthesis of MIDI data and chorus data

The present invention relates to a half-cycle of computer music, and more particularly, to a method of synthesizing midi data and chorus data, which can synthesize and play midi music performance and chorus performance simultaneously.

FIG. 1 is a block diagram showing the structure of a computer music half cycle according to the prior art. When the MIDI data stored in the data storage device 12 is applied to the MIDI controller 18 by the system controller 16, a tick is generated by the MIDI controller 18. FIG. It receives the tick signal output from the device 24 and transmits the MIDI data stored in the MIDI data buffer 76 of FIG. 2 to the sound source module 20 through the SIO (Serial Input / Output) 78 at a constant speed according to the tick signal. have.

Therefore, in the prior art, it was a problem that the chorus function could not be given to the computer music half cycle, and a technique for synthesizing the chorus data and the MIDI data so as to be played simultaneously has not been developed yet.

On the other hand, Japanese Patent Application Laid-Open No. 07-49690 (hereinafter referred to as "first advanced technology") adds a tone corresponding to chord and single note in a normal karaoke apparatus, so that two people may sing. Music processing apparatus, characterized in that to make the effect has been disclosed.

Looking at the configuration of the first prior art, each sound signal from each sound generating means 10 is synthesized by the adder 26 and supplied to the chorus circuit 28, the envelope of each of the sound generating means 10 is an envelope detecting circuit 34, Detected by 36 and 38 and synthesized by adder 40. The output signal of the adder 40 is numerically converted by the numerical converter 42 and the numerically converted value is supplied to the chorus circuit 28 and the addition state of the chorus is controlled.

Here, the chorus circuit 28 shown in the first prior art not only has a completely different configuration from the chorus control device 26 of FIG. 3 shown in the present invention, but also has a significant difference in operational effects. That is, in FIG. 1 of the first leading technology, 331, 332, and 333 may be various input sources as a sound signal input means, but the most prominent is a performance or voice input from a microphone. Alternatively, when signals are input from all of the input terminals 331, 332, and 333, it may be regarded as playing a chord, and when only one of them is input, it may be regarded as being a single note. In either case, if the envelope of the input signal is detected, and the numerical conversion is performed using the digital converter 42, the synthesized voice is recombined and the voice of the man sounds like the woman's voice, and the tone of the tone is bold. Sometimes it changes to a robotic sound. Also, because the processed voice is re-synthesized through the delay circuit, even when playing a single note, the effect can be as if two people are singing, and in some cases, it can be as if several people are singing.

Therefore, since the above-described first prior art can realize the effect of chorus called by several people by this process, it is thought that the synthesis means including the delay circuit is named chorus circuit 28, but the chorus mentioned above Is a technology that merely does not have a separate chorus wave (Wave), but simply reconstructed the signal input by the input means, it is true that it is practically impossible to synthesize the MIDI data and the separate chorus data and play at the same time as in the present invention. .

In addition, Japanese Utility Model Publication No. 3000299 (hereinafter referred to as "2nd New Technology") initializes only functions that need to be initialized without having to initialize the functions frequently occurring according to the user's preference in the normal karaoke performance function. The music playback device has been disclosed, which is characterized in that the function is not performed and the initialization is not performed for a function that does not require initialization. In other words, the 2nd prior art does not reset all the functions of the 2-chorus function, which is the effect function at the end of the performance, or the ＃ or 되는 function used for sound adjustment, but initializes the ＃ or ♭ function every time the performance starts. Do not reset the 2-Chorus function, but insert the 2-Chorus effect at the end of the performance if the 2-Chorus function was selected as previously selected, or omit the 2-Chorus effect at the end of the performance if the 2-Chorus function was not previously selected. It is configured to.

However, since the second advance technology is only a simple effect function that adds or deletes a chorus effect sound that is uniformly made in advance at the end of the music performance, the second chorus technology is used when the user sings a song as in the present invention. It was not practical to synthesize chorus data so that it could be played simultaneously.

In addition, Korean Patent Publication No. 133844 (hereinafter referred to as "third precedent technology"), in a normal karaoke system, appropriately divides one back chorus into one piece, divides it into a plurality of chorus patterns, and divides them into units of this chorus pattern. Background Art A back chorus synthesizing apparatus has been disclosed which can minimize memory capacity by synthesizing the back chorus.

Looking at the configuration of the third prior art, the music reproducing means 20 for inputting music data configured in the MIDI standard and reproducing music by the music data, and a back chorus played in correspondence with one piece of music data is provided. A plurality of chorus patterns for each piece corresponding to the corresponding music data from the storage means 30 by inputting the information of the music data to be reproduced by storing the data of the plurality of chorus patterns obtained by appropriately dividing and storing the data; Chorus data synthesizing means (50) for reading the data of the chorus and chorus data synthesizing means (50) for receiving the output of the chorus data reading means (40) and sequentially selecting a chorus pattern in synchronization with the reproduction of the music data to synthesize the music. It is composed of.

However, since the third prior art is a device for synthesizing the back chorus with respect to music from the music data configured in the MIDI standard, the MIDI control device and the chorus composed of a duration decrement device, a reference value control device, and a duration comparison device as in the present invention The invention is different from the synthesis method of synthesizing a MIDI music performance and a chorus performance using a control device so that it can be played simultaneously.

Accordingly, an object of the present invention is to provide a method of synthesizing midi data and chorus data, which is capable of simultaneously playing a midi music performance and a chorus performance by giving a chorus function to a computer music half cycle.

Another object of the present invention is to provide a computer music half-cycle so that a user can obtain a musical effect such as a real performance when singing.

In order to achieve the above object, a method of synthesizing MIDI data and chorus data of the present invention includes a process of searching for whether a tick signal for making one beat of music is generated, and a unique signal set for each song according to the tick signal. Reducing the MIDI duration value; searching for whether the reduced MIDI duration value matches a set reference value; and storing the MIDI data stored in the MIDI data buffer when the reduced MIDI duration value matches the reference value. Transmitting to the SIO, reducing a unique chorus duration value set for each song according to the tick signal, comparing whether the reduced chorus duration value matches a set reference value, and decreasing the comparison process. Chorus data buffer when the selected chorus duration value matches the reference value Transmitting chorus data stored in the PIO; and synthesizing the MIDI data output from the SIO and the chorus data output from the PIO in a mixer.

1 is a block diagram showing the configuration of a computer music half cycle according to the prior art.

2 is a block diagram showing the internal configuration of the MIDI control device in FIG.

3 is a block diagram showing the configuration of a computer music half-period in which MIDI data and chorus data synthesizing apparatuses are installed according to a preferred embodiment of the present invention.

4 is a block diagram showing the configuration of a chorus control device in a computer music half cycle of the present invention.

5 is a flowchart illustrating a method for synthesizing MIDI data and chorus data in a computer music half cycle of the present invention.

6a and b are graphs showing audio output waveforms in a computer music half period of the present invention.

6c and d are graphs showing output waveforms of chorus data waveforms in a computer music half period of the present invention.

7 is a flowchart illustrating a control method of a chorus mute device in a computer music half cycle of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used for the same components, even if displayed on different drawings. In the following description, it should be noted that only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to obscure the subject matter of the present invention.

3 is a block diagram showing the configuration of a computer music half-period in which MIDI data and chorus data synthesizing apparatuses are installed according to an exemplary embodiment of the present invention. In the drawing, reference numeral 10 denotes a key input device for transmitting a music selection command or other command periodically input by the music half-cycle user to the system controller, and 12 denotes a data storage device that stores MIDI data and chorus data. Reference numeral 14 is a display device for displaying and informing the user of lyrics or video information and other information of a song to be played, and 16 is a system controller for controlling the entire system. Reference numeral 18 denotes a MIDI control apparatus which outputs the MIDI data recorded in the MIDI data buffer 76 through the SIO 48 at a moment of decreasing the duration of the MIDI data for every tick signal received from the tick generator 24 described later. 18. The structure of such a MIDI control apparatus 18 will be easily understood by description of FIG. 2 mentioned later.

2 is a block diagram showing an internal configuration of a conventional MIDI control device 18. In the drawing, the MIDI control device 18 includes a duration decrement device 70, a duration comparator 72, a reference value storage device 74, and a MIDI data buffer 76. . That is, the duration decrement apparatus 70 stores a unique duration value related to the MIDI for each song, and receives a tick signal from the tick generator 24 to decrease the duration value of the MIDI data by one. Device. The reference value storage device 74 is set to a predetermined reference value, preferably 0, and the duration comparison device 72 compares the duration value reduced by one according to the tick signal in the duration decrement device 70 with the reference value 0. . The chorus data buffer 76 is a device that receives and stores MIDI data from the data storage device 12 of FIG. 3 and has an internal SIO 78 therein.

Here, reference numeral 20 in FIG. 3 denotes a sound source module, which is preferably a device for receiving MIDI data from the MIDI control device 18 and converting the MIDI data from the SIO 78 of the MIDI data buffer to the corresponding instrument sound. It is a driving unit. Reference numeral 24 denotes a tick generator that generates a tick required to make a beat of music, and reference numeral 26 denotes a chorus control apparatus of the present invention, which reduces chorus duration for every tick signal received from the tick generator 24. In this case, the chorus data stored in the chorus data buffer 46 is output in accordance with the byte clock. The detailed configuration of the chorus control device 26 of the present invention will be easily understood by the description of FIG.

4 is a block diagram showing a configuration of a synthesizing apparatus for synthesizing MIDI data and chorus data according to an embodiment of the present invention. In the drawing, reference numeral 40 denotes a duration decrement for storing a unique duration value related to the chorus data of each song for each song, and receiving a tick signal from the tick generator 24 to decrease the duration value of the chorus data by one. Device. Reference numeral 44 denotes a reference value storage device, and a predetermined reference value is preferably set to 0, which is equal to the reference value set in the reference value storage device 74 of the MIDI control apparatus of FIG. 2, which is used when the MIDI data is output to the mixer 40. At the same time, the chorus data is output to the mixer 40. Reference numeral 42 is a duration comparison device for comparing the duration value reduced by one according to the tick signal in the duration decrement apparatus 40 with the reference value 0 in stages. Reference numeral 46 is a chorus data buffer which receives and stores chorus data from the data storage device 12 of FIG. 3 and has a PIO 48 built therein, and 28 is an audio amp pack for restoring the compressed chorus data output from the PIO 48. It has a built-in SIO 52. Finally, reference numeral 30 denotes an audio deck that converts and outputs chorus data (digital signal) output from the SIO 52 of the audio amp pack into an analog signal, and 23 denotes a chorus output from the audio DAC 30 as a mixer. The device synthesizes the MIDI music output from the sound source module 20 and simultaneously outputs it to the audio driver 22.

Hereinafter, a method of synthesizing MIDI data and chorus data in the computer music half cycle configured as described above will be described in detail with reference to FIGS. 2, 4, and 5.

First, when the power of the music half cycle is switched on, the system controller 16 stores the MIDI data and the chorus data stored in the data storage device 12 in the MIDI data buffer 76 and the chorus data buffer 46, respectively. Subsequently, when the performance of the music half cycle starts, a tick signal is output from the tick generator 24, and the system controller 16 searches whether the tick signal has occurred in step 100. If the tick signal is generated from the tick generator 24 in the search process, the system controller 16 decreases the corresponding MIDI duration value selected by the duration decrement apparatus 70 of FIG. For example, the MIDI duration value is decremented by 1 each time the tick signal is output once. Preferably, the MIDI duration value is decremented by 50 times when the tick signal is generated 50 times. Next, in step 104, the system controller 16 compares whether the MIDI duration value reduced by step 102 matches the reference value 0. If the MIDI duration value and the reference value match in the comparison process, the system controller 16 transmits the MIDI data stored in the MIDI data buffer 76 of FIG. 2 to the SIO 78 in step 106. If the MIDI duration value does not match the reference value in step 104, the system controller 16 performs step 108 without going through step 106. That is, in the music half cycle, only the chorus without MIDI music is output through the audio driver 22.

Next, the system controller 16 decreases the chorus duration value stored in the duration decrement apparatus 40 by 1 according to the tick signal of step 100 described above in step 108. Subsequently, in step 110, the system controller 16 compares and searches whether the chorus duration value reduced in step 108 matches the reference value 0. If the reduced chorus duration value and the reference value coincide with each other, the system controller 16 transmits the chorus data stored in the chorus data buffer 46 to the PIO 48 in step 112. If the chorus duration value and the reference value do not match in step 110, the system controller 16 transmits only the MIDI data without the chorus to the sound source module 20.

Thereafter, as illustrated in the flowchart of FIG. 5, the MIDI data and the chorus data are simultaneously output through the SIO 78 and the PIO 48, respectively. That is, the MIDI data is input to the sound source module 20 through SIO 78 after performing step 106, and at the same time, the chorus data is output to the audio amp pack 28 through PIO 48 after performing step 112. Next, the sound source module 20 converts the MIDI data into an audio wave form by outputting the periodicity synthesized by the corresponding instrument sound, preferably the MIDI data, and at the same time, the audio DAC 30 is connected to the SIO 52 of the audio amplifier. The chorus data (digital signal) output from the digital signal is converted into an analog signal and output. Next, the mixer 23 synthesizes the chorus (analog signal) output from the SIO 52 and the MIDI music output from the sound source module 20 and outputs the synthesized music to the audio driver 22. Thus, the MIDI data and the chorus data are synthesized and played simultaneously in the same manner as described above, which will be clearly understood by the graph of FIG.

Claim 6 (a) to turn to be the duration of the value as a graph illustrating the waveform outputted from the sound source module 20, from that t ₀ to the number of ticks in deuleoganeunga from t ₀ to t ₁ to t _1. Therefore, time t ₀ -t ₁ = the duration of one tick of the MIDI duration value (hereinafter referred to as Expression (1)). Wherein if t is called the waveform output from ₀ to ₄ t sound module 20 during the pattern (Pattern) t _0, t ₀ is a pattern waveform having a constant periodicity. This is because the sound source module 20 creates a wave table by sampling various kinds of musical instruments and other various effects. For example, if there are n _0, n _1, n _2, n _{3, and} n ₄ duplicate waveforms in pattern t _0, pattern t _1, pattern t _2, pattern t _{3, and} pattern t ₄ , respectively _, by reducing the number of overlapping by _{1/2 n 0/2, n 1} /2, n 2/2, n 3/2, n 4/2 there is a redundant number of this will appear the effect tempo is twice faster . This means that tempo control is possible in sound module 20.

FIG. 6B is a graph showing the waveform output from the audio DAC 30. From t ₀ to t _a , the chorus enable terminal of FIG. 3 is turned low so that the bit clock is not input. This is the case where the chorus mute device 32 described later is operated. After t _a , the chorus mute device 32 is not in operation and a waveform that restores the chorus data sampled at regular intervals appears at the output of the audio DAC 30. Here, the time from t ₀ to t _a to mute the output of the audio DAC 30 is the time (t ₀ -t _a ) = time of one tick of the chorus duration value (hereinafter referred to as Expression (2)). Accordingly, the time of one tick in Equation (1) or the time of one tick in Equation (2) is the same value, which is the value generated by the tick generator 24 of FIG.

Therefore, the chorus waveform appears at the output of the audio DAC 30 after exactly (t ₀ -t _a ) elapses after the output waveform (MIDI music) of the sound source module 20 starts to be output. By doing this, it is possible to combine with chorus data that contains a human voice directly through a chorus according to the output waveform of the sound source module 20.

Here, since the chorus wave form contains a voice signal and thus cannot have repeated data of a certain period, in order to solve the problem, the present invention adopts a method of creating and inputting a separate chorus wave form according to tempo variation as shown in FIG. . At this time, the chorus waveform shown in FIG. 6c is the same as that of FIG. 6b and is a chorus data waveform sampled at a reference tempo. FIG. 6D is a chorus data waveform in which chorus data is called twice as fast as the reference tempo.

That is, in the present invention, chorus data according to the tempo variable is sampled and stored in the chorus data buffer 46, and when there is chorus data of the tempo as shown in the flowchart of FIG. 7, the chorus data is transmitted to the chorus controller 26. If there is no chorus data of the tempo, the chorus mute device 32 is operated to mute the chorus. The control method of the chorus mute device 32 according to the present invention will be described in detail with reference to FIG.

First, the system controller 16 of FIG. 3 searches for the original tempo when the music half-cycle is played in step 200. If it is determined in the search process that the original tempo, the system control unit 16 transmits the chorus data to the control device 26 in step 202. In this case, the corresponding chorus data is stored in the chorus data buffer 46 of the chorus controller and proceeds according to the flowchart of FIG. 5. If it is determined in step 200 as not the original tempo, the system controller 16 searches whether there is chorus data of a variable tempo in step 204. If there is chorus data of a variable tempo in the data storage device 12 in the searching process, the system controller 16 transmits the chorus data to the chorus controller 26 in step 208, and the transmitted chorus data is stored in the chorus data buffer 46. And proceeds according to the flowchart of FIG. 5 described above. Here, if it is determined in step 204 that there is no chorus data of variable tempo, the system controller 16 sends a command to the chorus mute device 32 to mute the chorus in step 206, and the chorus mute device 32 mutes the chorus. .

As described above, the present invention can realize the same musical effect as the actual performance by synthesizing the MIDI music performance and chorus performance can be played at the same time, which allows the user to sing while enjoying more lively music There is an advantage to that.

Claims (1)

In a method of synthesizing MIDI data and chorus data in a computer music half period having a MIDI control device comprising a duration decrement device, a reference value control device, and a duration comparator and a chorus control device, a tick signal for making one beat of music Retrieving if it has occurred; Gradually decreasing a unique MIDI duration value set for each song according to the tick signal; Searching whether the reduced MIDI duration value coincides with a set reference value; Transmitting the MIDI data stored in the MIDI data buffer to the SIO when the MIDI duration value reduced in the searching process matches the reference value; Reducing a unique chorus duration value set for each song according to the tick signal; Comparing the reduced chorus duration value with a set unique reference value; Transmitting chorus data stored in the chorus data buffer to the PIO when the chorus duration value reduced in the comparison process matches the reference value; And synthesizing the MIDI data output from the SIO and the chorus data output from the PIO in a mixer.