The Hymn software is meant to strip Apple's copy protection from music bought at the iTunes Store, without any loss in audio quality. Although the FairPlay technology is nominally meant to block music piracy, Hymn's founders note that it also prevents owners from listening to tracks under operating systems such as Linux, or loading them onto non-Apple media players. Similarly, FairPlay limits users to five computers, and makes it difficult to create backups without burning CDs. The coders of Hymn thus defend it as enabling fair use.