Yamaha Corporation

Maki Kamiya

Eiichiro Aoki

Masao Sakama

Shigehiko Mizuno

Yutaka Tohgi

Hiroyuki Ohba

Hironori Osakabe

A normal automatic accompaniment performance is executed in accordance with an accompaniment pattern read out from a pattern memory. When a special performance is designated such as an intro, fill-in or ending performance, a modification suitable for the special performance is applied to a accompaniment pattern read out from the memory, so that the special performance is inserted in accordance with the thus-modified accompaniment pattern. At that time, the pattern may be modified by desired modifier data describing a manner of modifying the pattern. The pattern modification can be diversified by setting an individual modification condition to each musical instrument part of the accompaniment pattern in correspondence to the designated modifier. A memory is provided for storing a number of modifier data, and a further arrangement is provided for freely editing the modifier data stored in the memory. A still further arrangement is provided for dislaying the accompaniment pattern in the pre-modification state and the accompaniment pattern in the post-modification state for a visual comparison therebetween. There are also provided various methods to designated a desired modifier as well as various pattern modifying methods.

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Hamamatsu, Japan

Maki Kamiya