Copybit inverter

The copybit eliminator published in the February 1994 issue of this magazine has two drawbacks. The first of these is that it cannot be used without modifying the digital audio equipment. The second is clear from the revisit to the eliminator in the September 1995 issue: from time to time, the eliminator needs updating - it is not 'future-proof'. The copy-permit converter described in this article does not have these drawbacks.