
Read this: Now-playing information on TOKYO FM 100% correct - James Cridland

Summary: Its a laborious process, since you need to know exactly was and wasnt played, and include music from commercials and jingles. Instead, the music rights people in Japan have direct access to their now-playing information right off the playout system. Radio programmers must get the now-playing information correct before the songs played and therefore it drips through correctly to every other system and platform that the stations available on. - james.cridland.net
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