does not count as much as one played at 4 p.m., and a station with a large audience will influence the chart more than either a station in a smaller market or one with a specialized format that attracts less audience. The audience charts cross-reference plays information with listener information compiled by the Nielsen Audio ratings system to determine the approximate number of audience impressions made for each play. Others are based on audience impressions, including the all-format Radio Songs chart, Rock & Alternative Airplay, Country Airplay, R&B/Hip-Hop Airplay, Rap Airplay, Latin Airplay and Christian Airplay. The Mediabase system looks for an audio fingerprint, i.e., a characteristic that differentiates a song from all of the other ones that it tracks.Ĭertain airplay charts are based on the number of plays that each song received in a given format that week, including Pop Airplay (Mainstream Top 40), Adult Contemporary, Adult Pop Airplay (Adult Top 40), Alternative Airplay, Adult Alternative Airplay (Triple A), Mainstream Rock Airplay, Mainstream R&B/Hip-Hop Airplay, Rhythmic Airplay, Adult R&B Airplay, Christian AC Airplay, Gospel Airplay, Dance/Mix Show Airplay and Smooth Jazz Airplay. The Luminate system utilizes that same point-of-sale that music merchants use to track their inventory, so an itemized receipt from one’s last visit to a music retailer essentially doubles as a ballot cast for our charts.īillboard‘s radio charts are compiled using information tracked by Mediabase, which electronically monitors radio stations in more than 140 markets across the U.S., as provided to Billboard by Luminate. All sales charts use the entire Luminate panel. A limited array of verifiable sales from concert venues is also tabulated. The sample includes not only music stores and the music departments at electronics and department stores, but also direct-to-consumer transactions and Internet sales (both physical albums via Internet, and ones bought via digital downloads). Data for Billboard‘s sales charts, which include all album charts are compiled by Luminate from a universe of retailers that represents more than 90% of the U.S.
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