What is the difference between Hits Daily Double numbers and Soundscan numbers?
Hits Daily Double tabulates their sales figures via store reports (as in, a store manager or someone phones/faxes in sales reports). Soundscan measures their sales via computerized scans. Each time you buy a CD and it’s scanned for pricing, that is counted as a Soundscan sale. This method is more accurate because store reports are influenced by human error and bias.