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Music generation Navigation

Rhythmical structure


 

About

Intro

Music & computers

Attempts of generation

Computer based generation

Music generator

Main principles

Scale structure

Rhythmical structure

Rhythmical groups

Melodic groups

Melodic structure

Supporting notes

Harmonic structure

Algorithmization

Main conclusion

Interactive

Introduction

Some theory

Integration basis

Algorithmization principles

Main conclusion

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Rhythmic structure defines repetitions of the rhythmic figures in the period.
Sr = r1 r2 r3 r4
Where rj (j is the number of every two-bar) defines the same rhythmical two-bar.
The number of different rj values corresponds the number of different two-bars generated during program termination. Rhythmical structure defines the sequence of the two-bars created.

There are four variants do Sr in program:
Sr1 = 1 1 1 1;
Sr2 = 1 1 2 2;
Sr3 = 1 2 1 2;
Sr4 = 1 2 2 1;

Where structure Sr1 = 1 1 1 1 means that the 2-nd,the 3-d and the 4-th two-bar rhythmical figures will be based on first two-bar rhythmical figure. (During program termination only one test two-bar is being created. This two-bar is called "test" because the final rhythmical figure also depends on the current scale structure (Sn) and other generation parameters.)
The structure Sr4 = 1 2 2 1 shows that the 4-th two-bar rhythmical figure is based on the rhythm of the first two-bar and the 3-d two-bar rhythmical figure is based on the rhythm of the second two-bar.
Generally speaking the rhythmical figures of the first and second two-bars are different.
Repetition of the rhythmical figures doesn't mean their identity. The variation of the other generation parameters (as noted below) finally gives different note durations. This variation leads to random repeat of first note durations. Generally speaking the number of such a repetitions is also random.