Playing device, playing method, recording medium, and electronic musical instrument

Provided is a playing device which can naturally develop a playing segment musically. According to pressing of a development button, a CPU judges which stages the playing segments of the present selected tracks (1-4) belong to, thus acquiring hte number of playing segments of the different stages; in addition, the stage, which has the maximum value of the number of the stages of the playing segments, is determined as the present stage; and then the playing segments of the present selected tracks (1-4) are changed into the next stage next to the present stages, so that a naturally developed segment of the music can be formed. By means of the playing device, even a rookie who is lack in musical knowledge can set a proper playing segment which is matched with development of the present music. 提供能够变更为在音乐上成为自然展开的演奏段落的演奏装置。CPU(13)根据展开按钮的按下，对当前所选择的各音轨(Track(1)～(4))的演奏段落是属于哪个阶段，而取得不同阶段的演奏段落的数量。而且，将所取得的不同阶段的演奏段落的数量中成为最大值的阶段判断为"当前的阶段"，将各音轨(Track(1)～(4))的演奏段落变更为接着所判断出的"当前的阶段"的下个阶段，因此能够变更为在音乐上成为自然展开的演奏段落，由此即使是音乐知识缺乏的初学者用