New Package "MIDI Arpeggiator QMidiArp" (description from website). two parts: ebuild, and patch
Created attachment 40949 [details] v1, media-sound/qmidiarp/qmidiarp-0.0.2.ebuild ebuild.
Created attachment 40950 [details, diff] v1, qmidiarp-0.0.2-fix_qtdir_in_makefile.patch patch.
Checking this out right now :).
compiles, loads things, runtime looks fine. Added to portage, thanks for posting!