Abstract: An automatic performance device has a phrase performance information memory storing pieces of phrase performance information having predetermined phrase lengths, which each have phrase-discriminating information imparted thereto. A performance pattern memory stores pieces of performance pattern information for determining a sequence of performance of the pieces of phrase performance information. A CPU prepares pieces of performance pattern information by storing the pieces of phrase-discriminating information into the performance pattern memory in a sequence of performance of the pieces of phrase performance information, according to operation by an operator, and imparts to the prepared pieces of performance pattern information as many pieces of pattern-discriminating information. Pieces of performance pattern information are designated by means of the pattern-discriminating information.

Abstract: There is disclosed an electronic keyboard system capable of producing musical tones on the basis of a sequence of pieces of musical data information and comprising: (a) memory for storing the pieces of musical data information grouped by time durations with respect to a beginning of a performance; (b) modification range defining portion for specifying a head position and a terminational position in the pieces of musical data information; (c) setting portion for establishing a variation; (d) modifying portion for modifying each first musical data information between the head position and the terminational position on the basis of the variation.

Abstract: There is disclosed an electronic keyboard system capable of producing musical tones on the basis of a sequence of pieces of musical data information and comprising: a) memory for storing the pieces of musical data information grouped by time durations with respect to a beginning of a performance; b) modification range defining portion for specifying a head position and a terminational position in the pieces of musical data information; c) setting portion for establishing a variation; d) modifying portion for modifying each first musical data information between the head position and the terminational position on the basis of the variation.