hi
what do you use to compose your music? i'm trying to use rosegarden but there are some things i don't like (first of all the tremendous complexity to actually get sound to the speakers through fluydsynth and jack). what about muse? any others worth trying? i need something professional that lets me transpose notes, change clef, key, tempo without too much hassle. on windows i used guitar pro 4... actually rosegarden has some features that gp4 didn't have and in many cases it works ok, so for the moment i'm sticking with it. and what about drums? can i compose a pattern in hydrogen and then import it in one of these midi notation programs (rosegarden, muse etc.) ?

Sorry for a non-open source answer, but I use Sibelius. It's a bit pricey, but it is VERY]powerful. (I use the OS X version-no windoze for this guy.)