Resonance (Voice of the Serpent- Disciple Yelwitz [sp?] SSRA temple).
Harmonize (Sorrowsong Cloak- Shei Vinitras (sp again) Ahkeva Ruins) or (Bloodfiend's Throat Gem) (Cazic-Thule anniversary named)
Note.. they don't stack. I went and got the voice to check and make sure.
Any other cool clickies that enhance our songs? Not many focus effects do, I'm finding.