Mark, Thanks so much for the link. This is an amazing basics-of-digital-audio document. I never had the justification for this as I got into PC audio in 1999 and hadn't done much prior to that. I had worked from 1974-2004 designing audio and video systems (except the brief dalliance into designing audio equipment at McCurdy in Toronto from 1981-1983). I started getting interested in tape preservation in 1996-1997 worrying about my own tapes from the 1970s and realizing at that time not many people cared. I tried to fix the link which was broken when I received it. Cheers, Richard On 2017-06-05 5:21 PM, Mark Donahue wrote: > The LFI-10 was a necessary tool in the early days of digital audio. It > allowed you to look at the subcode data in the digital stream and modify > it. Most of the DAT machines did not conform to the standards and to get > things to work correctly you needed to modify the status bits. The manual > is required reading for anybody that wants to know about digital > interfacing. > http://lcweb2.loc.gov/master/mbrs/recording_preservation/manuals/Lexicon%20LFI-10%20Digital%20Audio%20Format%20Interface.pdf -- Richard L. Hess email: [log in to unmask] Aurora, Ontario, Canada 647 479 2800 http://www.richardhess.com/tape/contact.htm Quality tape transfers -- even from hard-to-play tapes.