Initially, in the United States, there was a market separation between "music" CD-Rs and "data" CD-Rs, the former being notably more expensive than the latter due to industry copyright arrangements with the RIAA.[2] Specifically, the price of every music CD-R included a mandatory royalty disbursed to RIAA members by the disc manufacturer; this granted the disc an "application flag" indicating that the royalty had been paid. Standalone music recorders would refuse to burn CD-Rs that were missing this flag. The two types of discs are functionally and physically identical save for this, and computer CD burners can record any kind of data to either.[3] New music CD-Rs are still being manufactured as of late 2020, although demand for them has declined as CD-based music recorders have been supplanted by other devices incorporating the same or similar functionality.