The info that they gave you in the other thread is pretty much all correct. You've got a wide variety of music softwares to choose from, and most of them are geared towards making all sorts of music, from Techno, to Rock, to Classical.
Also, don't think you'll be able to find a program with which you can make awesome music out of nowhere and without practice. Music-making software can be hard to get used to at first, so if you plan on giving up after playing around with the program for a few minutes, then you won't get far, trust me. The only easy music-making programs are the ones where you grab short music loops and combine them together, and that's against the rules to submit here on Newgrounds.