This video is a demo, rather than a tutorial -- it's a live sequenced performance of my track "tiny droplets" using seq24, a pattern-based sequencer that's designed specifically with live performance in mind. Here, I'm playing the track by triggering pre-sequenced loops of MIDI data, which are being sent out to a couple of different synths (Hydrogen, and a Waldorf Blofeld). The audio from those is routed through Ardour, but Ardour's just being used as a live mixer and effects unit.
Many thanks to AutoStatic3000 for sorting out the technique I used to capture this video; if you're in to Linux audio, and you haven't seen his videos, be sure to check them out!