So just buy the program you are planning to promote, make some beats with it and then share them with the world! If you have the luck of being a music producer or a natural music talent, and you make great beats...it's even better!
By showing people that the program really works and you can make good music with it, they will definitely want to buy it! And as an example, here is the first video that I made using Dr Drum: "How to Make a House Beat in 3 Minutes".
Please support guys!