Patent ID: 7863513

Claim:
A recorder for recording a performance represented by pieces of first sort of music data in ensemble with a playback of a music passage represented by pieces of second sort of music data different in format from said first sort of music data, comprising: an interface connected to a data source of said pieces of said first sort of music data, another data source of said pieces of said second sort of music data and a destination to which a music data file is supplied; and a data processing unit connected to said interface, extracting pieces of reference characteristic data representative of particular features of an audio waveform expressing said music passage from said pieces of said second sort of music data for synchronization between said performance and another music passage produced in another playback, and forming said pieces of said first sort of music data, said pieces of reference characteristic data and pieces of time data representative of timing to reproduce tones produced in said performance into said music data file for supplying said music data file through said interface to said destination, in which said data processor extracts pieces of reference correlation data representative of variation of certain frequency components from said pieces of second sort of music data as said pieces of said reference characteristic data, and said pieces of reference correlation data are used in a correlation analysis between said music passage and said another music passage.