Why does NPR/DS need to know the start times and end times or duration of each song?
Start and end times/duration are needed to calculate (1) the Actual Total Performances of each song, defined as the total number of people who heard a given song each time it was streamed, which we get by matching song play time with stream access during that time from your streaming logs and (2) your station’s Music Aggregate Tuning Hours (MATH), which is the total hours of music streamed times the number of people listening at the time music was played.