If you are looking for a free way to produce music, try Cakewalk by BandLab or Reaper (which has a very generous free trial). These are professional-grade tools that are safe and legal to use.
Using a keygen to obtain an authentication code for Sony Acid Pro 7 is relatively straightforward. Here's a step-by-step guide: Sony Acid Pro 7 Authentication Code Keygen 48 -FREE-