Hi If you sing or rap and need professionally pre-produced instrumentals for a debut CD or demo you have come to the right place. After you buy the physical CD for $150 you may use the music in any way you see fit to make money through dubbing your vocal performance. As long as your purchase of the physical CD is traceable you have bought a non-exclusive license to all audio material on that specific CD, so keep your receipt, it is your non-exclusive license. If you do not plan on republishing the material but only wish to use it for sharpening your writing or vocal skills then buying the digital version is perfect for such use, also the digital version will allow you to listen and judge the material before you by the physical version. Good Luck www.slrrecordsinc.com