| 摘要 |
PURPOSE:To obtain an automatic accompaniment which matches the theory of music by reading an automatic accompaniment pattern out of an automatic accompaniment pattern memory and varying the automatic accompaniment pattern with root information. CONSTITUTION:The interval of the automatic accompaniment pattern 1 is converted by an interval conversion device 2 according to the root information 3. Namely, when the root sound information 3 is 'fa', the automatic accompaniment pattern is entered in C major, so the automatic accompaniment pattern is moved in parallel by the difference between a note number '38' having tonality information showing 'fa' and a note number '35' having tonality information showing 'do' to obtain an automatic accompaniment signal 4. Thus, the automatic accompaniment pattern memory where note numbers having tonality information are entered is provided to obtain the automatic accompaniment pattern matching the theory of music. |
