 Other complete sets of Caruso's recordings in new remasterings were issued on CD on the Pearl label and in 2000–2004 by Naxos.The 12-disc Naxos set was remastered by the noted American audio-restoration engineer Ward Marston.In 1993, Pearl also released a two-CD collection devoted to RCA and EMI's electrically over-dubbed versions of some of Caruso's original acoustic discs, originally issued in the 1930s.