| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for acquiring a musical performance data file according to an audio music selected by a user.SOLUTION: Perfect matching retrieval of an index is performed with respect to an SMF database (DB) for karaoke on a cloud server based on audio data selected by a user (S303). When it is failed (S304 is NO), first melody data is calculated by subtracting audio data of a karaoke version from the audio data, and to the DB, matching retrieval of a pitch data string of an initial melody part is performed (S308). When it is failed (S309 is NO), or the karaoke version cannot be used (S305 is NO), and reliability of the melody data extracted by acoustic analysis (S310), partial matching retrieval of the index+matching retrieval of the pitch data string of the initial melody part are performed (S313 and S315 are YES). The SMF data retrieved by any one of these kinds of retrieval is extracted from the DB (S316). |
