JPH01179092A - rhythm generator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

[Technical Field of the Invention] The present invention relates to a rhythm generation device that automatically generates a rhythm (sequence of note lengths). [Background] Rhythm is based on the idea that when parts come together, it becomes a whole.
It can be thought of as a combination of mini-rhythm patterns of short length (for example, -beats). From this idea,
This creates an approach for automatic rhythm generation. That is, a set of mini-rhythm patterns is stored in a storage means, and mini-rhythm patterns are randomly extracted from this set using a random number generator and combined. With this configuration, it is possible to generate a wide variety of rhythms. However, this configuration does not include any elements that control the relationship between the mini-rhythm patterns that make up the rhythm.In other words, if we use a rhythm generating device with the above configuration, The probability that the desired rhythm will be generated is very low.
It becomes necessary to use the rhythm generating device for a long period of time. C. OBJECT OF THE INVENTION Accordingly, an object of the present invention is to provide a rhythm generating device that can efficiently generate a rhythm desired by a user in a relatively small number of times.

[Structure and operation of the invention]

In order to achieve the above object, the present invention provides mini-rhythm pattern storage means for storing a set of mini-rhythm patterns, as well as evaluation value storage means for storing rhythm evaluation values for each mini-rhythm pattern in the set,
Instruction information indicating the range of rhythm evaluation values that each mini-rhythm pattern constituting the generation rhythm should have is inputted from the input means as instruction information regarding the generated rhythm, and mini-rhythm patterns having evaluation values within the range specified by this instruction information are inputted from the input means. The present invention is characterized in that a rhythm pattern is selected from the mini-rhythm pattern storage means by the mini-rhythm pattern combining means, and the selected mini-rhythm patterns are combined. Therefore, according to the present invention, the instruction information from the input means has the function of mutually controlling the mini-rhythm patterns that constitute the generated rhythm.Therefore, a consistent rhythm is generated, and the user The desired rhythm can also be efficiently generated. [Embodiment 1] The present invention will be described in detail below with reference to one drawing. The 11th ffl shows the overall configuration of the rhythm generation device according to this embodiment.The rhythm generation device includes a mini rhythm pattern memory 1, an evaluation value memory 2, and a rhythm pattern characteristic data memory 3 as data memories for rhythm generation. Equipped with The mini-rhythm pattern memory l stores a set of relatively short-length rhythm patterns (mini-rhythm patterns). An example of this is shown in FIG. 2. In this example, the length of the mini-rhythm pattern is assumed to be one beat (quarter note), and a total of 16 types of mini-rhythm patterns are shown. - All possible mini-rhythm patterns are illustrated when the number of beat resolutions is 4. The evaluation value memory 2 stores evaluation values for each of the mini-rhythm patterns stored in the mini-rhythm pattern memory 1. The third wI shows an example of evaluation value data.
In this example, the types of evaluation values include the degree of syncopation and the fineness of the beat. Address 0~
The data at 15 represents the degree of syncopation for each of the 1st to 16th mini-rhythm patterns 1 to 10,000. On the other hand, the data at addresses 16 to 31 represent the fineness of the beat for each of the 1st to 16th mini-rhythm patterns. Data on the degree of syncopacy was obtained as follows. - Considering the four possible sound onset positions M (pulse points) within a beat, consider the following and assume the following as a 0-weight pattern (syncopation pulse scale) that gives each pulse point a weight related to syncopation. . In this pulse scale, the first pulse point (the beginning of the beat) is zero, the next pulse point (the point at which a sixteenth note has elapsed from the beginning of the beat) is 90, and the next pulse point is 45.
Let us express the weight of the first pulse point, where the last pulse point has a weight of 90, by PSi. On the other hand, let us express a -beat mini-rhythm pattern by Ri="l" when the note starts at the first pulse point, and Ri="0" when it does not start. For example, pattern R of D. It is expressed as The degree of syncopation, V, is given by: This becomes the data of the degree of syncopation shown in FIG. 3 (however, the value V which is not an integer value is approximated by an integer value). The rhythm pattern feature data memory 3 in FIG. 1 contains feature parameters (T
i) is stored. An example of a feature parameter is shown in FIG. 4, and is used to control rhythmic changes between beats within a bar. Input device 4 inputs instruction information that instructs the range of rhythm evaluation values that each mini-rhythm pattern of the rhythm to be generated should have. In this embodiment, as instruction information, (A ) Upper limit Uj (B) Lower limit Lj (C) Rate of change Xj are input. The input data is placed in the work memory 5 along with other data. The CPU 5 determines an upper limit U and a lower limit sentence for a 6-beat section within a measure from the input instruction information. Here, u=Uj+TiXXj/100 1=Lj+T i X X J/100
is given by Furthermore, the CPU 5 sets the upper limit U for the section 5 of one beat.
A mini-rhythm pattern having an evaluation value within the range of and lower limit is selected from the mini-rhythm pattern memory 1, and a rhythm for one measure is generated by combining the selected mini-rhythm patterns for each section. The generated rhythm is output through the monitor 7. If the user is dissatisfied with the output result of the monitor 7, he or she can request the rhythm generation to be restarted from the input device 4. FIG. 5 shows an overview of the overall operation of the embodiment. In step 5-1, the evaluation value for each mini-rhythm pattern is read into the work memory 5. In step 5-2, the characteristic data of the rhythm pattern is read. After that, from the user, The receiver takes the upper and lower limit reference data UJ, Lj for each evaluation value and the change rate data Xj with respect to the reference (5-3.5-4), and in the last 5-5, 1
The rhythm of a measure is given data Uj, Lj. Produced according to XJ, Ti. Details of reading the evaluation value 5-1 are shown in FIG. Initialize the pointer P to the start address of evaluation value memory 2 (6-1) and repeat steps 6-2 to 6-6 until the value of P exceeds (number of mini rhythm patterns) x (type of evaluation value). Repeat, for each P, i = int (P/1B)(
1B represents the number of mini-rhythm patterns), calculate the type I of the evaluation value.6-2), J=PmOdl
Calculate the number j of the mini rhythm pattern using B 6-3
), the data in P is set in vij as the first evaluation value for the pattern with pattern number j (6-
4). The details of reading the feature data 5-2 are shown in FIG. 7. The pointer P is initialized to the starting address of the feature data memory 3 (7-1), and the loop from 7-2 to 7-4 is described below as the data end code. Repeat until EOD is obtained.Set the feature data for the (P+1)th beat in P to Tp7-2), then set P to Jh6 (7-3), and P when Tp=EOD holds. , is set to N as the number of beats in one bar (7-5). Details of processing 5-3.5-4 for input from the user are shown in FIG. Initialize the evaluation value type counter i8-1), and set the upper limit input by the user for each type i,
Set the lower limit and rate of change to the registers Ui, Li, Xi - (1,% (8-2.8-3%8-4),
Advance the type number (8-5) until the value exceeds the total number of evaluation value types VTN (2 in this example) (8-6)
, loops 8-2 to 8-6 are repeated. Details of the rhythm generation 5-5 are shown in FIG. In the figure, i is the section number, i=0 represents the first beat, pp represents the rhythm data to be generated, the data format is a binary number, and each beat 2 beat position corresponds to each time. A bit of “1” indicates that the sound starts at that position.
The '0' bit indicates that the sound does not start at that position. The processing in 9-1 and 9-2 is to initialize i and pp. In 9-3, if the sound is within the upper and lower limits for interval i, It is checked whether a mini-rhythm pattern with a certain evaluation value exists. If it exists, a pattern PATi for section i is generated by means (1) (9-4), and if it does not exist, a pattern PATi for section i is generated by means (1). 2), a pattern PATi for one section i is generated (9-5), and the generated pattern PATi is PP=PPX (10)+6+PATi
is combined with the generated pattern (9-6)
In other words, the generated rhythm data in PP is shifted to the left by 4 bits, and PATi is set to the rightmost 4 bits.
When i=1000, PP=10101000 is obtained by the process of 9-6. Section number i is advanced (9-7), and i is the length of one measure N.
The processing from 9-3 onwards is repeated until reaching (4 in this case) (9-8). The details of check 9-3 are shown in Fig. 1θ, which checks whether there is a mini-rhythm pattern with an evaluation value between the upper limit uj and the lower limit 41j for the interval i for each evaluation value type j. be. 10-1-10-5, regarding interval i, type of evaluation value j
(j=0 to VTN-t), the upper limit uj
And the lower limit! Calculating Lj. In 1O-6 and 1O-7, the evaluation value type j and the mini-rhythm pattern number k are initialized to check the existence of a mini-rhythm pattern. 10-8 is a determination as to whether the first evaluation value VJ,k of the second mini-rhythm pattern satisfies the following conditions: uj≦Vj, and≦JLj. If the above conditions are not met, advance the pattern number (10
-9), we move on to checking whether vJ%k of the pattern satisfies the above conditions. When the incremented pattern number reaches the total number of mini rhythm patterns, 16,
We conclude that it does not exist (10-10.1O-16). When the condition is satisfied at 10-8, the evaluation value type number j is advanced (10-11), and for other evaluation value types, the evaluation value of the th mini-rhythm pattern is uj≦V3. , check whether the condition h≦jLj is satisfied (10-13
), when the evaluation values of all types of the th mini-rhythm pattern satisfy one condition. At 10-12, j=VTN is established. Therefore, it is concluded that it exists (10-15). If the condition 10-13 is not satisfied for any type j, return j to "0" (10-14), and add 1 to = +1. Proceed to step 9. FIG. 11 is a detailed flowchart of means (1). This process is performed when there is a mini-rhythm pattern that satisfies the upper and lower limit conditions. First, by random number generation, the number of the mini-rhythm pattern from θ to the 15th is generated, and that number is set to H (11
-1), which corresponds to sampling any one pattern from the set of mini-rhythm patterns. Initialize the evaluation value type j to "0" (1l-2), and set the flag fl to 1'' assuming that the mini rhythm pattern R is a usable pattern (11-3), 11-
4 and 11-5, calculate the upper limit U and lower limit sentence for the evaluation value type j, and calculate the evaluation value V of the type j of the mini rhythm pattern H.
s, * is. Check whether the following conditions are satisfied: ≦vj, R≦U (11-6)
, this check is performed for all evaluation value types j=Q ~V
If the condition is not met even once, perform the test against TN-1 (11-8, 1l-9). Reset the flag to “0” (lt-7) and use the mini rhythm pattern R as rhythm data! ! Remember that there is no. At step 11-10, the flag fl is checked, and if it is "O", a mini-rhythm pattern number R is generated again using a random number and the process is repeated. When the flag fil is "l" in step 11-10, the sampled 'mini-rhythm pattern satisfies the conditions of the upper limit U and the lower limit l for all types of evaluation values. Therefore, let R be the selected pattern for the i-th interval and P
Set to ATi (11-11). The process of means (2) that is executed when there is no mini-rhythm pattern that satisfies the conditions of the upper and lower ranges is the 12th
As shown in the figure. In this example, the pattern PATi for interval i is
The mini-rhythm pattern that is closest to the conditions defined by the upper limit U and lower limit sentence is selected. Specifically, the mini-rhythm pattern R that satisfies the following, that is, the mini-rhythm pattern R that minimizes the value of R=0 to 15, is set as the pattern PATi for the section i. According to FIG. 12, MIN is initialized to a large value in 12-1, and R is initialized to O" in 12-2. The evaluation value type j and the register S for accumulation are initialized.
-3), find the upper limit U and lower limit U Jumiko for each type j (Is!-4, 12-5), D=I 2-V
Find the difference between the evaluation value for type j of mini rhythm pattern H and the average value of the upper and lower limits using j, *I (
12-6), and then accumulates the value of D in the register S to obtain Σl-Vj,*1 (12-7). When the cumulative result S is smaller than the previous minimum value MIN (12-10), update MIN with S and set R at that time to P A T k (12-1O112-11
), this process is applied to all mini-rhythm patterns R (=θ~
15) (12-12.12-13),
As a result, a mini-rhythm pattern R is set for PATi that minimizes the sum of the differences between the upper and lower limits of the average U Jubun value □ and the evaluation values V, , and R within R=O~15. It turns out. In the above embodiment, the length of the rhythm to be generated is l measures, but it is easy to modify the rhythm to generate a longer rhythm. Also, although the length of the l measure is 4 beats, this can also be changed to other time signatures. Furthermore, −
We have shown 16 types of beat mini-rhythm patterns whose minimum time is the length of a 16th note.
It is also possible to use a set of mini-rhythm patterns that correspond to a series. Also, regarding the feature data Ti,
Multiple types may be prepared and the user may select one at the time of generation. Furthermore, in the above embodiment, only the degree of syncopation and the fineness of the beat are mentioned as types of evaluation values, but other types of evaluation values can also be used.
The number-likeness evaluation value obtained using the number pulse scale can be used. As for the evaluation value, it is desirable to select one that matches the subjective and sensory scale of one person in order to efficiently obtain the rhythm.
The fineness of the beat is an example of this. The present rhythm generating device described in detail above can be used as a function of an automatic composing machine. is generated by using the rhythm generated by the rhythm generating device as a reference rhythm and dividing/combining notes of this reference rhythm using a pulse scale. The details of generation of a tone length sequence using a pulse scale are shown in Japanese Patent Application No. 121037/1982 filed by the applicant of the present invention. [Effects of the Invention] As is clear from the above description, the present invention provides an evaluation value storage means for storing evaluation values for each mini-rhythm pattern, and inputs instruction information indicating a range for the evaluation value from an input means. Then, a rhythm is generated by selecting mini-rhythm patterns within the range specified by this instruction information and combining them. Therefore, a rhythm controlled by the instruction information specified by the user will be formed, and there is a high possibility that the characteristics of the rhythm intended by the user will be reflected in the rhythm generated by the instruction information. It becomes possible to efficiently obtain a desired rhythm with a small number of movements.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram of a rhythm generating device according to an embodiment of the present invention, 2nd wJ is a diagram showing an example of a set of mini rhythm patterns, and FIG. 3 is a diagram showing an example of evaluation value data stored in an evaluation value memory. 4 is a diagram showing an example of data stored in the feature data memory for each beat, FIG. 5 is a flowchart showing the overall operation of the embodiment, FIG. 6 is a flowchart for reading evaluation values, and FIG. Figure 8 is a flowchart for reading characteristic data for each beat, Figure 8 is a flowchart for user manual operation, Figure 9 is a flowchart for generation, Figure 1θ is a flowchart for checking the existence of mini rhythm patterns, and Figure 11 is a method (1). FIG. 1112 is a flowchart of means (2). ! ... Mini rhythm pattern, 2 ... Evaluation value memory, 4 ... Input device, 6 ...
CPU. Patent applicant: Casio Computer Co., Ltd. 01. -unij i≧= i book fu Flk B' Fig. 3 Figure 'f94@411 mhM nee' - human power left double'P shiren (1)

Claims (1)

[Scope of Claims] Mini-rhythm pattern storage means for storing a set of mini-rhythm patterns; evaluation value storage means for storing rhythm evaluation values for each of the mini-rhythm patterns; an input means for inputting instruction information indicating a range of rhythm evaluation values that each mini-rhythm pattern constituting the rhythm should have; A rhythm generation device comprising: mini-rhythm pattern combination means for selecting from pattern storage means and combining the selected mini-rhythm patterns.