Original sentence: The precursors to DAPs were portable CD players and Mini disc players (neither being generally considered a "digital audio player")
Edited sentence: Although these restricted formats are not anywhere near as popular as the MP3 format.In recent years it has become politically incorrect to manufacture a device which will only play non-restricted formats as these are almost exclusively used for pirated music and other activity such as ripping CD's which the music industry does not approve of.It should be noted however that CD's and Minidisc's store music in digital form, and strictly speaking these devices can also be referred to as digital audio players.The precursors to DAPs were portable CD players and Mini disc players.The term "digital audio player" is more neutral and takes away emphesis on the mp3 format and hints at its eventual replacement by proprietary DRM-laden formats