Generating a musical part from an electronic music file

(57) the method of generating an owner pitch music part from the electronic music file which consists of summary musical instrument parts, The stage which generates the control stream (24) which shows which musical instrument part has the highest value over a certain period, It has a stage which chooses one of the musical instrument parts over the above-mentioned period based on a control stream (24), and a stage which outputs the musical instrument part selected over the above-mentioned period in order to generate a music part. The method of generating a non-pitch music part from an electronic music file has the stage of identifying the pattern (76) in an electronic music file, and a stage which combines a pattern (76) alternatively in order to generate a music part.