Actually with software it acts in the dead opposite. You buy a license for the software, you don't buy the software. The original media it is on is not important. That you only load it on as many as currently licensed is. If you decommission an old machine that frees up one of the licenses.

So by IT standards you would buy a single user license for music. You then load the music to the place of your choice and play it from there. If you license is a single user then you can only load it to one machine at a time. If it is a multi-user license then the number of machines it can be loaded on is governed by that number. Typically it is a multiple of 5 as System admins can't add unless it is binary or multiples of 5. Now must software suppliers allow you to store the original software and a copy of it so that you can reload the media on to the licensed computer as needed.

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Things like DVD regions are restraint of fair trade. They create artificial barriers to free trade and are not used to determine the languages or other special features. It is merely used to stop DVDs that are sold cheaper in some regions being shipped to other ones.