Ah, the beauty of TalkBass: I had no idea of
Mister Barrington relating to your questions above, so a quick jaunt to youtube clarified that. That's a great band that uses current tech to produce their live sound. The recipes to satisfy your sonic palate hunger can be approached from a couple of different angles.
1) The band, itself: A nice summary,
http://www.emusician.com/artists/0767/mister-barrington/151032 explaining software, gear, programming, live techniques, studio techniques used in live setting, sound and loop triggering
2) Use of Ableton Live: Check out this loop primer: [Invalid or Expired Link Removed] . Although loopcommunity is devoted to use of tracks in worship settings, the info contained there is helpful in all settings. For example, you'll find your connection answers there. You can also learn about tracking, playing tracks, triggering tracks within a song, and set mapping.
When it comes to use of Ableton Live, don't forget to Live user groups, stated on Ableton's web site. Finally, there are online resources for learning Ableton Live, including Berklee, Boston.
3) Speaking of Berklee, Boston, don't forget the musical skill aspects of Mister Barrington. That band has individual chops, performance skills, interactive chemistry, stage presence, and technology mastery. That's a full cup for a band!
4) Triggering synth sounds from your bass. This is the perennial question, to which many answers are available, most of which have varying shares of advantages and drawbacks. For example, you could follow route one, using Roland pickups, piezo pickups, pitch-to-midi converters, and a variety synth engines. Or, you could go route two, using your mono bass signal to a single pedal, or your mono bass signal to multiple pedals. There are many great threads covering this in TalkBass
Effects section.
Good luck in your quest, and thanks again for that heads ups on
Mister Barrington.