The invented method includes the following steps: firstly, selecting partial original music and making conversion, for converted music event data making preanalysis of take-off time; according to preanalyzed result calculating the waiting time of every music event in the described music event; then according to the calculated result utilizing the original music event group to synthesize new musicevent data sequence; back-playing the described new music event data sequence, at the same time continuously converting subsequent original music, then cycling the above-mentioned processing steps.