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you create a backup copy:
this is not illegal because there is an RIAA / CPCC levy on the blank disc for this exact reason

you put the original in a secure place and use the copy for testing purposes

another thing you can do in this case, is create a CD of partials,

Audacity is free and you can manipulate the songs to be worthless for anything but testing

ie. take the best parts of songs
Fade-in to the bumping / booming, rattle the neighbors windows parts then Fade-out

drop about 15 minutes of 1 - 2 minute samples onto a CD-R and you protect your investment