[LAU] Yet another jack question

After successfully implementing the audio connection of my tracker with jack, I'm not trying to have the midi part running. It seems fairely easy from what I got however I'm facing a connection problem to be able to test it properly: In qjackctl, the midi connection I create appears correctly in the midi tab. However, all synth I've tried (amSynth/rtsynth) create their midi input from alsa and the connection appears in the alsa tab without any apparent way of connecting my output to their input. Is that normal ? Is there really two 'categories' or midi connection and does that mean I should use alsa driver instead ? I was kind of liking the apparent audio/midi syncronisation jack was providing... If anyone knows of a synth that uses jack for midi, it'd be nice too Thanks Marc