As far as I know, Schazam directly reads the ISRC codes that are embedded as meta data in most commercial recordings to allow artists to collect royalties from streamed and broadcasted performances of their work. Although it wouldn't be impossible to put such information in a live recording, the ISRC codes are usually put in by the mastering engineer of a studio recording. Actually, adding it LIVE, I think would be impossible. They could only be added to a RECORDING of a live performance.

More often than not, the actual recording is played in a movie, so the meta data is included in the playback for Schazam to process. However, a live performance of a song in a video is much less likely to have had the ISRC codes added by someone after the video was recorded.


Keith
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