I brought this topic up a couple of years ago & got a lot of suggestions, all involving purchasing & using complicated equipment along with my computer. What I was looking for then & still looking for today is a stand alone digital unit to replace my 4 channel reel to reel. .................. Is there anything new along those lines ???? Over the last 6 months, I've noticed this company in the UK (Vocalion) is making SACD's of a lot of the 70's stuff with a 4.0 layer. It's called "SACD Surround". Is there anyway to make these 4.0 sacd's (or even dvd audio) at home ? I also noticed recently that someone is selling CD-4 albums with a 4.0 "homemade" DVD Audio disc (of the same album) on ebay. ..... How is this done ???? ... Is it as easy as using a 4 channel reel to reel ?