OpenMG on Sony's Network Walkman

Jun 22, 2001
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I am planning to buy Sony's Network Walkman...and I heard that it converts the MP3 into this file format called ATRAC3 via a program called OpenMG.

on ZDnet's review page of the product its says:


<< OpenMG also employs a checkout system, which restricts each track to three transfers to any Sony player. In order to check out a fourth instance of a particular tune, you have to check another song back in. >>


can someone please explain what that means??