Control, timing, and other information may be exchanged between devices as indicated by lines 4Ab and 5Aa, while line 4Aa interconnects the CID 3A with the computer 4A. Recorded information from any one SSRPD 1A, may be copied to a PSD 2A, and then the PSD may be used to copy to as many other SSRPDs 5A-as desired without the requirement of additional devices.