Dear all We are currently investigating different formats for the migration of ear ly videotape and have come across two media with which we are unfamiliar. These are DLT (digital linear tape) and UDO (optical tape). Does anybody have any experience with either of these which they would be willing to share? I'd be grateful to hear of both the positive and negative aspects of these media. Many thanks Alan Alan Crookham Archivist The National Gallery [log in to unmask]