How are the sale of music CDs to be monitored?
CD sales are monitored for two main purposes. The first is to measure how much CD is sold overall, as a measure of how well the industry is holding during changes in the economy or the emergence of alternative ways of getting music. The second is to measure which CD sells best during a specific period, especially in the form of weekly graphs.
There are several ways to measure CD sales throughout the industry. One is to take the numbers reported by the shops themselves. Another is the use of characters created by recording labels. Generally, the latter method will be slightly more accurate, as there are a smaller range of recording labels on most markets than in sellers' stores, so it is easier to get a precise picture from less sources. For example, only in the United States is the four largest recording companies responsible for more than 80 percent of CD sales each year. This is designed to determine the balance in achieving accurate results without the cost of collecting data that are too high. UseThe sample is generally considered acceptable, because it does not necessarily depend on how many copies of each CD are sold if they can be assessed in the order of sales with sufficient accuracy.
usually will be extrapolated from complete sale from the sample shop to achieve the overall results. Shops will be selected to provide a reasonable overview of the whole market, so they will have to cover different geographical areas as well as various audiences, such as "serious" music lovers and more occasional, common audience. The selection of shops can be tuned in creating specialized charts, such as those for a particular music genre.
Some countries now include the sale of digital downloads and selling CDs in their official numbers. These sales may be more tough because each site has accurate numbers about how many "copies" of the album has been downloaded in a more accurate form than some retail chains were easily dosdull. There are different ways to integrate download data. One way is to take the actual number of paid downloads and then adjust this number so that it forms the "correct" share of total sales based on what is known about the balance between CD and downloading market sales.
The use of digital download numbers can drastically affect the composition of music charts. On the one hand, this means that the extremely popular edition will not become the risk of selling in stores, as can happen with the sale of CDs if the demand is underestimated. On the other hand, older songs can and do well. This is especially common when the musician dies and their rear catalog suddenly sells very well online. This is not always reflected so fast with the CD, because it may take time for the publishers to re -release albums at Meet for demand.