îLESONIQ Music Festival is going down on August 12-13, in the beautiful city of Montreal. For two glorious days (not counting their pre-show, îLESONIQ In The City happening on August 11), Park Jean-Drapeau will come to life with heavy bass, deep rhythms, uplifting melodies, and music that inspires hands-to-the-sky sing-alongs and a whole lot of head banging. Now six months out from the day the gates will open, îLESONIQ has graciously unleashed the lineup.