JPH0437440B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to an improvement in an automatic performance device that can automatically perform a desired piece of music with rhythmic accompaniment. [Summary of the Invention] This invention stores rhythm pattern selection information together with music information in a memory or the like, and when reading the music information and performing automatic performance, selects a rhythm pattern based on the rhythm pattern selection information and selects a rhythm pattern. By performing the music, it is possible to create a rhythmic accompaniment that is suitable for the performance piece and is rich in variety. [Prior Art] Conventionally, an automatic performance device has been known which starts an autorhythm device to provide rhythm accompaniment in synchronization with the start of automatic performance when performing automatic performance based on music information read from a memory. (See, for example, Japanese Patent Application Laid-open No. 130385/1985). [Problems to be solved by the invention] In the conventional automatic performance device described above, the rhythm to be played is manually selected, so it is necessary to select the appropriate rhythm for each piece of music to be played. It was a pain to do so. In addition, the autorhythm device includes march, waltz, swing...
Since only general rhythm patterns are stored for each type of rhythm such as, the range of rhythm selection is limited and the rhythm performance tends to become monotonous. In order to vary the rhythm performance, it would be possible to memorize a large number of rhythm patterns including fill-in patterns, ending patterns, etc. for each rhythm type and to be able to select them as appropriate. It is inevitable that operations will become even more complicated. [Means for Solving the Problems] This invention has been made to solve the above-mentioned problems, and it is possible to create a rhythmic accompaniment that is suitable for a piece of music and is rich in variety without any troublesome operations. The purpose is to The automatic performance device according to the present invention includes: (a) a first storage unit storing a plurality of sets of pattern data having different contents, with one set of pattern data representing a rhythm pattern of a performance section of a predetermined length; music information corresponding to the note progression of the music; first and second pattern selection information instructing to select one set of pattern data and another set of pattern data among the plurality of sets of pattern data; (c) a second storage unit storing first and second timing information respectively representing pattern selection timings regarding the first and second pattern selection information in relation to the note progression of the song; The music information is read out from the second storage unit according to the note progression of the music, and the music information is read out from the storage unit of the first
and reading means for sequentially reading out the first and second pattern selection information according to pattern selection timing indicated by second timing information; (d) reading out the first pattern selection from the second storage section; When the information is read out, the first pattern selection information is held, and when the second pattern selection information is read out from the second storage section, the second pattern selection information is stored in the first pattern selection information. (e) each time the holding means holds pattern selection information, a set of pattern data indicated by the pattern selection information is selected from among the pattern data in the first storage section; (f) a rhythm sound generating means that automatically generates a rhythm sound signal by reading the music information from the second storage section; The apparatus is equipped with musical tone generating means for generating musical tones. [Operation] According to the configuration of the present invention, the first and second
The first and second pattern selection information are sequentially read out in accordance with the pattern selection timing indicated by the timing information, and are sequentially held in the holding means. When the first pattern selection information is held by the holding means, rhythm performance is automatically performed according to the set of pattern data specified by the first pattern selection information, and the holding means holds the second pattern selection information. When the selection information is retained, the pattern data is
Automatic rhythm performance is performed by switching to the set of pattern data indicated by the pattern selection information.
Therefore, a rich variety of rhythm accompaniments can be created without the need for troublesome rhythm selection operations. [Embodiment] Fig. 1 shows an embodiment in which the present invention is applied to an electronic musical instrument.The electronic musical instrument of this embodiment can generate manually played sounds, automatically play music, and perform music automatically with the help of a microcomputer. Automatic rhythm accompaniment etc. are now controlled. Circuit configuration (Fig. 1) The bus 10 includes a keyboard circuit 12, a control switch circuit 14, a central processing unit (CPU) 16, a program memory 18, a working memory 20, a reading device 22, a performance data memory 24, and a tempo oscillator (OSC). )26, Tone generator for music (TG)
28 and rhythm tone generator (TG) 3
0 is connected. The keyboard circuit 12 is equipped with a manual performance keyboard having a large number of keys, and key scanning information is detected by scanning a key switch provided for each key. The control switch circuit 14 includes control switches for tone, volume, effects, etc., a performance data reading switch, an automatic performance start/stop switch, etc., and switch operation information is detected by scanning these switches. ing. The CPU 16 executes various processes such as manual performance sound generation, automatic musical performance, automatic rhythm accompaniment, etc. according to programs stored in a program memory 18 consisting of a ROM (read-only memory). Regarding the processing of
This will be described later with reference to FIGS. 12 to 12. The working memory 20 is RAM (random
access memory), and consists of 16 CPUs.
It includes recording areas used as registers, counters, flags, etc. during processing. Note that registers related to automatic performance of music and automatic rhythm accompaniment will be described later. The reading device 22 is for reading performance data from an external storage medium 32 made of, for example, a ROM pack, and starts the reading operation when the aforementioned performance data reading switch is turned on with the external storage medium 32 inserted into the receiving slot. I'm starting to do that. The performance data memory 24 is composed of a RAM, and is used to store the performance data read by the reading device 22. The tempo OSC 26 generates tempo clock pulses. When interrupts are enabled in the main routine of FIG. 7, the tempo OSC26
The interrupt routine of FIG. 8 is executed each time the tempo clock pulse is generated, thereby performing automatic musical performance and automatic rhythm accompaniment. The tempo of the song's automatic performance and rhythm accompaniment is set by the tempo.
It is determined according to the repetition frequency of the tempo clock pulse generated from the OSC 26. The musical piece TG 28 is a tone generator used for manual performance sound generation or automatic musical performance, and has, as an example, 16 time-sharing musical tone formation channels. Therefore, up to 16 sounds can be simultaneously produced as manual performance sounds or automatic performance sounds. The rhythm TG 30 is a tone generator used for automatic rhythm accompaniment, and has, for example, eight time-division percussion sound formation channels. Therefore, up to eight rhythm sounds can be produced simultaneously. The sound system 34 includes an output amplifier, a speaker, etc., and is configured to convert musical tone signals from the music TG 28 and rhythm sound signals from the rhythm TG 30 into sound. Performance Data Format (FIGS. 2 to 6) FIG. 2 shows the format of performance data in the external storage medium 32. As shown in FIG. The performance data is a header that shows the song number, song title, etc.
HD, music data MD that represents pitch, volume, key on/off timing, etc. for each channel of CH ₁ to CH ₁₆ , and control data for controlling tone, volume, effects, rhythm on/off, rhythm selection, etc. CD
and rhythm data RD representing rhythm patterns, etc.
Contains. These data are read in the order of description and stored in the performance data memory 24. Then, automatic performance and automatic rhythm accompaniment of the music piece are performed based on the performance data stored in this manner. As shown in detail in Figure 3, the header HD contains 2 bytes of data A representing the song number and 1 byte per character.
32-byte data B representing the song title in bytes,
16 sets of data C each representing the starting address of data for 16 channels of CH ₁ to _{CH 16} with 2 bytes per set, and 2 representing the starting address of control data CD.
It includes byte data D and 2-byte data E representing the starting address of rhythm data RD. The music data MD consists of 4-byte data EVM for one event arranged in sequence, as shown in Figure 4 for any one channel of CH ₁ to CH ₁₆ , and there are no breaks in the middle of the arrangement. The code data RS is arranged as appropriate, and the end code data MED is arranged at the end of the array. The 4-byte data EVM for one event consists of 1-byte key code data KC representing the pitch of the sound to be produced, 1-byte key-on timing data KON representing the sound generation timing, and 1-byte key-off data representing the mute timing. It consists of timing data KOF and 1-byte volume level data VOL representing the volume level of the sound to be produced. In addition, the rest data RS is inserted to realize a long rest period in units of measures, and consists of 1-byte rest code data RC and 1-byte measure number data BN indicating the number of measures. ing. If the timing data KON and KOF have 4 beats, the timing value is divided into 96 and 0.
-95; if it's a triple meter, it's divided into 72 and expressed as one of 0-71; if it's a double meter, it's divided into 48 and expressed as one of 0-47. Note that a rest period shorter than one bar can be realized by providing a difference corresponding to the desired rest period between the key-off timing value of one event and the key-on timing value of the next event. The control data CD is as shown in detail in Figure 5.
Three bytes of data EVC for one event are arranged in sequence, and end code data CED is placed at the end of the arrangement. 3 for 1 event
Byte data EVC represents control timing in the same way as described above for KON and KOF.
Byte control timing data CT and 1 byte control type data representing control types such as tone, volume, effect, rhythm on/off, rhythm selection, etc.
It consists of CS and control value data CV representing a desired control state or control amount. As the 3-byte data EVC related to rhythm control, data related to rhythm on/off control and data related to rhythm selection are used. The 3-byte data EVC regarding rhythm on/off control is
The control timing data CT indicates the timing when the rhythm should be turned on or off, the control type data CS indicates rhythm on/off control, and the control value data CV indicates rhythm on (“1”) or rhythm off (“0”). represents. Also,
The 3-byte data EVC regarding rhythm selection indicates the rhythm selection timing using control timing data CT, the rhythm selection using control type data CS, and the rhythm pattern number to be played (i.e. rhythm pattern number) using control value data CV. ). As shown in detail in Figure 6, the rhythm data RD includes 1-byte data PN representing the number N of rhythm patterns, attribute data PS representing the attributes (time signature, etc.) of each rhythm pattern, and N different rhythm data PN. It includes first to Nth rhythm pattern data PT ₁ to PT _N representing respective patterns. The attribute data PS consists of N bytes of data S ₁ to S _N. The upper two bits of each byte of data represent the beat BT, and the lower three bits represent the instrument group number IGN. The 2 bits that represent the time signature BT are "00" if it is a 4 time signature, "01" if it is a 3 time signature,
If it is a time signature, it is set to "10". In this embodiment, eight rhythm patterns can be stored, and the maximum value of N is eight. Further, musical instrument group numbers IGN of 0 to 7 are determined corresponding to these eight rhythm patterns (namely, rhythm pattern numbers 1 to 8), respectively. Each instrument group number IGN is used to allocate a group of percussion sounds necessary to play the corresponding rhythm pattern to the eight percussion sound formation channels of the rhythm TG30. For example, IGN
An example of sounds assigned to each channel for IGN=0 and IGN=7 is as follows.

〔Effect of the invention〕

As described above, according to the present invention, first and second pattern selection information and first and second timing information for pattern selection timing instructions regarding these information are stored in relation to the note progression of a song. Then, the first and second pattern selection information are sequentially read out according to the first and second timing information and sequentially held by the holding means, and the set of pattern data specified by the held pattern selection information is read out. Therefore, since automatic rhythm performance is performed, it is possible to enjoy rhythmic accompaniment that is suitable for a piece of music and is rich in variety, without the need for troublesome rhythm selection operations. Moreover, when the first pattern selection information is read out,
Since the pattern selection information is held until the second pattern selection information is read, (a) the first pattern selection is determined depending on the value of the pattern selection timing indicated by the second timing information. The length of the rhythm performance section based on the information or the first
(b) It is possible to arbitrarily set the timing at which the pattern selection information is switched to the second pattern selection information; (b)
No matter how long the rhythm performance section based on the first pattern selection information becomes, it is only necessary to store one set of pattern data representing the rhythm pattern of a performance section of a predetermined length, such as one measure, and the memory capacity is small. There are also benefits such as being able to work.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the circuit configuration of an electronic musical instrument according to an embodiment of the present invention, FIG. 2 is a format diagram of performance data in an external storage medium, FIG. 3 is a format diagram of a header, and FIG. is a format diagram of music data, Figure 5 is a format diagram of control data, Figure 6 is a format diagram of rhythm data, Figure 7 is a flowchart of the main routine, and Figure 8 is a diagram of the interrupt routine. Flowchart: FIG. 9 is a flowchart of control data processing; FIG. 10 is a flowchart of music data processing; FIG. 11 is a flowchart of channel-specific processing; FIG. 12 is a flowchart of rhythm sound processing. It is. 10...Bus, 14...Control switch circuit, 1
6...Central processing unit, 18...Program memory, 20...Working memory, 22...Reading device, 24...Performance data memory, 26...Tempo oscillator, 28...Tone generator for music, 3
0...Rhythm tone generator, 32...External storage medium, 34...Sound system.

Claims (1)

[Scope of Claims] 1 (a) a first storage unit storing a plurality of sets of pattern data having different contents, with one set of pattern data representing a rhythm pattern of a performance section of a predetermined length; (b) a desired music piece; music information corresponding to a note progression; first and second pattern selection information for instructing to select one set of pattern data and another set of pattern data among the plurality of sets of pattern data; (c) a second storage unit storing first and second timing information respectively representing pattern selection timings related to the first and second pattern selection information in relation to the note progression of the song; The music information is read out from the storage unit according to the note progression of the music, and the first
and reading means for sequentially reading out the first and second pattern selection information according to pattern selection timing indicated by second timing information; (d) reading out the first pattern selection from the second storage section; When the information is read out, the first pattern selection information is held, and when the second pattern selection information is read out from the second storage section, the second pattern selection information is stored in the first pattern selection information. (e) each time the holding means holds pattern selection information, a set of pattern data indicated by the pattern selection information is selected from among the pattern data in the first storage section; (f) a rhythm sound generating means that automatically generates a rhythm sound signal by reading the music information from the second storage section; An automatic performance device comprising a musical tone generating means.