Of those recorder/players that could be connected to a PC via a USB lead, although it was possible to transfer audio from the PC to the MiniDisc recorder, for many years it was not possible to transfer audio the other way. This restriction existed in both the SonicStage software and in the MiniDisc player itself. SonicStage V3.4 was the first version of the software where this restriction was removed, but it still required a MiniDisc recorder/player that also had the restriction removed. The Hi-MD model MZ-RH1, was the only such player available.