Am I missing something? Does it work for you? I did set the correct input device (/dev/rmidi1) in its settings but LMMS doesn't seem to see any kind of input from my MIDI keyboard. While I can confirm for fluidsynth, I can't for LMMS. The NetBSD Guide states that Digital Audio Workstations and other software with support for NetBSD MIDI in the Packages Collection include audio/lmms and audio/fluidsynth.