Just thought I would interject something else. Remember, you do not actually own the software or the music, you are purchasing a LICENSE to use it. (Most fine prints for software and also music, inform you that you are licensed to use it). Using the copy, as long as it is the only copy being used at any one time should not be a factor, if you have the original, and are not using both the copy and the original to run more than one show. If you are using the original in one system, but also use the copies in yet another show, that would be a violation of your license, if you have two seperate systems, it would most likely be a stretch of the copyright laws to say "I am only using one at a time." If they were a complete system, you most likely could be popped on that.
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