Abstract: A keyboard instrument is configured such that a flat panel-like display unit such as a liquid crystal display for displaying character information and/or images is provided on an instrument main body and that speakers, a recording/reproducing unit for multi media such as sound and/or image recording media, a microphone and a "karaoke" reproduction unit are connected to the display unit so as to improve the function of displaying a notation and/or lyric at the time of a performance, a performance function such as an ensemble performance or "karaoke" performance, and a tuning function.

Abstract: 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.