Part of the Theater of Blood Key Quest.
After completing all 3 Skylance Missions and turning in Tarnished Chime to Ao The 4th Born.
You turn in the Harmonic Chime to Arch Mage Galsin in a tent at the zone in area (Loc. -177.68,1465.70, 7.91) to receive the Silent Harmonic Chime.
Edited, Sat Apr 15 14:14:19 2006