[Summary] [challenge] lyrics and a well matched to generate that without each other's constraints melody. In A the present invention, the common music generation data used to generate the melody and lyrics. In one embodiment, music generation data of the original is fed in via the music generation data selecting section A3 generating unit A4 and melody generator from the music generating database A1 (1) A5, Lyrics and melody are generated on the basis of the music data generation. Number of notes of the melody that has been generated by the melody generator (1) A5 is a melody correction unit A6, generates means A4 In it is modified to match the number of syllables words generated, Consistency between the melody and the lyrics are taken. In another embodiment, fix portion is provided instead of the melody correction unit A6. In other embodiments, instead of the melody generator (1) A5 and melody modification unit A6, melody generator (2) having a function to match the melody generated number of syllables words are provided.
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