you obviously don't understand copyright then
because people can write their own... as long as it doesn't replicate any other which has been written. If freetrack did that... and didn't access anything to do with NP, then no problem
even musicians now, are starting to be sued (and winning) for other musos ripping off a couple of bars from someone else's work (Larrakin Music v's Men At Work) let's hope Clemete's estate doesn't get wind of this
, everyone will end up sued
plagiarism, with regard to books... the same
Software is no different.
You don't own the software, the developer does
You don't own the music, the writer does
You don't own the contents of the book, the author does